MAX4237EUT+T中文资料

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MAX4173TEUT-T中文资料

Applications
Notebook Computers
Portable/Battery-Powered Systems
Smart Battery Packs/Chargers
Cell Phones
Power-Management Systems
General System/Board-Level Current Monitoring
The combination of three gain versions and a userselectable external sense resistor sets the full-scale current reading. This feature offers a high level of integration, resulting in a simple and compact currentsense solution.
+20V/V (MAX4173T) +50V/V (MAX4173F) +100V/V (MAX4173H) ♦ ±0.5% Full-Scale Accuracy ♦ ±0.3mV Input Offset Voltage (MAX4173T) ♦ 420µA Supply Current ♦ Wide 1.7MHz Bandwidth (MAX4173T) ♦ +3V to +28V Operating Supply ♦ Available in Space-Saving SOT23-6 Package
Typical Operating Circuit
0 TO +28V
VSENSE
+3V TO +28V 0.1µF

MAX4238AUT-T中文资料

General DescriptionThe MAX4238/MAX4239 are low-noise, low-drift, ultra-high precision amplifiers that offer near-zero DC offset and drift through the use of patented autocorrelating zeroing techniques. This method constantly measures and compensates the input offset, eliminating drift over time and temperature and the effect of 1/f noise. Both devices feature Rail-to-Rail ®outputs, operate from a single 2.7V to 5.5V supply, and consume only 600µA.An active-low shutdown mode decreases supply cur-rent to 0.1µA.The MAX4238 is unity-gain stable with a gain-band-width product of 1MHz, while the decompensated MAX4239 is stable with A V ≥10V/V and a GBWP of 6.5MHz. The MAX4238/MAX4239 are available in 8-pin narrow SO and 6-pin SOT23 packages.ApplicationsThermocouples Strain Gauges Electronic Scales Medical Instrumentation Instrumentation AmplifiersFeatureso Ultra-Low, 0.1µV Offset Voltage2.0µV (max) at +25°C2.5µV (max) at -40°C to +85°C3.5µV (max) at -40°C to +125°C o Low 10nV/o C Drifto Specified over the -40o C to +125o C Automotive Temperature Range o Low Noise: 1.5µV P-P from DC to 10Hz o 150dB A VOL , 140dB PSRR, 140dB CMRR o High Gain-Bandwidth Product1MHz (MAX4238)6.5MHz (MAX4239)o 0.1µA Shutdown Mode o Rail-to-Rail Output (R L = 1k Ω)o Low 600µA Supply Current o Ground-Sensing Inputo Single 2.7V to 5.5V Supply Voltage Rangeo Available in a Space-Saving 6-Pin SOT23 PackageMAX4238/MAX4239Ultra-Low Offset/Drift, Low-Noise,Precision SOT23 Amplifiers________________________________________________________________Maxim Integrated Products1Typical Application Circuit19-2424; Rev 1; 12/02For pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at .Pin Configurations appear at end of data sheet.Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.Ordering InformationM A X 4238/M A X 4239Ultra-Low Offset/Drift, Low-Noise, Precision SOT23 Amplifiers 2_______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGSELECTRICAL CHARACTERISTICS(2.7V ≤V CC ≤5.5V, V CM = GND = 0V, V OUT = V CC /2, R L = 10k Ωconnected to V CC /2, SHDN = V CC , T A = +25°C ,Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.Power-Supply Voltage (V CC to GND).......................................6V All Other Pins.................................(GND - 0.3V) to (V CC + 0.3V)Output Short-Circuit Duration(OUT shorted to V CC or GND)...............................Continuous Continuous Power Dissipation (T A = +70°C)6-Pin Plastic SOT23 (derate 9.1mW/°C above +70°C).727mW 8-Pin Plastic SO (derate 5.88mW/°C above +70°C).....471mWOperating Temperature Range..........................-40°C to +125°C Junction Temperature......................................................+150°C Storage Temperature Range..............................-65°C to +150°C Lead Temperature (soldering, 10s).................................+300°CMAX4238/MAX4239Ultra-Low Offset/Drift, Low-Noise,Precision SOT23 Amplifiers_______________________________________________________________________________________3ELECTRICAL CHARACTERISTICS (continued)(2.7V ≤V CC ≤5.5V, V CM = GND = 0V, V OUT = V CC /2, R L = 10k Ωconnected to V CC /2, SHDN = V CC , T A = +25°C , unless otherwise noted.)M A X 4238/M A X 4239Ultra-Low Offset/Drift, Low-Noise, Precision SOT23 Amplifiers 4_______________________________________________________________________________________ELECTRICAL CHARACTERISTICS(2.7V ≤V CC ≤5.5V, V CM = GND = 0V, V OUT = V CC /2, R L = 10k Ωconnected to V CC /2, SHDN = V CC , T A = -40°C to +125°C , unless other-wise noted.) (Note 5)testing. Devices are screened during production testing to eliminate defective units.Note 2:IN+ and IN- are gates to CMOS transistors with typical input bias current of 1pA. CMOS leakage is so small that it isimpractical to test and guarantee in production. Devices are screened during production testing to eliminate defective units.Note 3:Leakage does not include leakage through feedback resistors.Note 4:Overload recovery time is the time required for the device to recover from saturation when the output has beendriven to either rail.Note 5:Specifications are 100% tested at T A = +25°C, unless otherwise noted. Limits over temperature are guaranteed by design.MAX4238/MAX4239Ultra-Low Offset/Drift, Low-Noise,Precision SOT23 Amplifiers_______________________________________________________________________________________5Typical Operating Characteristics(V CC = 5V, V CM = 0V, R L = 10k Ωconnected to V CC /2, SHDN = V CC , T A = +25°C, unless otherwise noted.)MAX4239GAIN AND PHASE vs. FREQUENCY (T A = +25°C)FREQUENCY (Hz)G A I N A N D P H A S E (d B /D E G R E E S )1M100k10k1k-160-140-120-100-80-60-40-20020406080-1800.1k10MMAX4238GAIN AND PHASE vs. FREQUENCY (T A = -40°C)FREQUENCY (Hz)G A I N A N D P H A S E (d B /D E G R E E S )1M100k10k1k-160-140-120-100-80-60-40-20020406080-1800.1k10MMAX4238GAIN AND PHASE vs. FREQUENCY (T A = +25°C)FREQUENCY (Hz)G A I N A N D P H A S E (d B /D E G R E E S )1M100k10k1k-160-140-120-100-80-60-40-20020406080-1800.1k10MOUTPUT LOW VOLTAGE vs. OUTPUT SINK CURRENTSINK CURRENT (mA)O U T P U T L O W V O L T A G E (V )151050.050.100.150.200.250.350.300020OUTPUT HIGH VOLTAGE vs. OUTPUT SOURCE CURRENTSOURCE CURRENT (mA)O U T P U T H I G H V O L T A G E(V )151050.050.100.150.200.250.300020OFFSET VOLTAGEvs. COMMON-MODE VOLTAGECOMMON-MODE VOLTAGE (V)O F F S E T V O L T A G E (µV )2.71.80.9-0.20.20.4-0.43.6OFFSET VOLTAGE vs. SUPPLY VOLTAGESUPPLY VOLTAGE (V)O F F S E T V O L T A G E (µV )4.84.13.4-0.200.20.4-0.42.75.5INPUT OFFSET DISTRIBUTIONOFFSET VOLTAGE (µV)P E R C E N T A G E O F U N I T S (%)1.51.20.90.60.30-0.3-0.6-0.9-1.2-1.510203040500MAX4238GAIN AND PHASE vs. FREQUENCY (T A = +125°C)FREQUENCY (Hz)G A I N A N D P H A S E (d B /D E G R E E S )1M100k10k1k-160-140-120-100-80-60-40-20020406080-1800.1k10MM A X 4238/M A X 4239Ultra-Low Offset/Drift, Low-Noise, Precision SOT23 Amplifiers 6_______________________________________________________________________________________Typical Operating Characteristics (continued)(V CC = 5V, V CM = 0V, R L = 10k Ωconnected to V CC /2, SHDN = V CC , T A = +25°C, unless otherwise noted.)COMMON-MODE REJECTION RATIOvs. FREQUENCYFREQUENCY (kHz)C M R R (d B )100100.11-140-120-100-80-60-40-2000.011000-160POWER-SUPPLY REJECTION RATIOvs. FREQUENCYM A X 4238/39 t o c 13FREQUENCY (kHz)P S R R (d B )100100.11-140-120-100-80-60-40-200-1600.011000MAX4239GAIN AND PHASE vs. FREQUENCY (T A = -40°C)FREQUENCY (Hz)G A I N A N D P H A S E (d B /D E G R E E S )1M100k10k1k-160-140-120-100-80-60-40-20020406080-1800.1k10MMAX4239SMALL-SIGNAL TRANSIENT RESPONSEMAX4238/39 toc17A V = 10V/V R L = 2k ΩC L = 100pF10µs/divOUTIN500mV/div50mV/divMAX4238LARGE-SIGNAL TRANSIENT RESPONSEMAX4238/39 toc15A V = 1V/V R L = 2k ΩC L = 100pF10µs/divOUT IN 1V/div1V/divMAX4239GAIN AND PHASE vs. FREQUENCY (T A = +125°C)FREQUENCY (Hz)G A I N A N D P H A S E (d B /D E G R E E S )1M100k10k1k-160-140-120-100-80-60-40-20020406080-1800.1k10MOVERVOLTAGE RECOVERY TIMEMAX4238/39 toc18A V = 100V/V R L = 10k ΩV CC = 2.5V V EE = -2.5V400µs/divOUT IN1V/div50mV/divMAX4238SMALL-SIGNAL TRANSIENT RESPONSEMAX4238/39 toc16A V = 1V/V R L = 2k ΩC L = 100pF10µs/divOUT 50mV/divIN50mV/divSUPPLY CURRENT vs. SUPPLY VOLTAGESUPPLY VOLTAGE (V)S U P P L Y C U R R E N T (µA )432120030040050060010005Detailed DescriptionThe MAX4238/MAX4239 are high-precision amplifiers that have less than 2.5µV of input-referred offset and low 1/f noise. These characteristics are achieved through a patented autozeroing technique that samples and cancels the input offset and noise of the amplifier.The pseudorandom clock frequency varies from 10kHz to 15kHz, reducing intermodulation distortion present in chopper-stabilized amplifiers.Offset Error SourcesTo achieve very low offset, several sources of error common to autozero-type amplifiers need to be consid-ered. The first contributor is the settling of the samplingcapacitor. This type of error is independent of input-source impedance, or the size of the external gain-set-ting resistors. Maxim uses a patented design technique to avoid large changes in the voltage on the sampling capacitor to reduce settling time errors.The second error contributor, which is present in both autozero and chopper-type amplifiers, is the charge injection from the switches. The charge injection appears as current spikes at the input, and combined with the impedance seen at the amplifier ’s input, con-tributes to input offset voltage. Minimize this feedthrough by reducing the size of the gain-setting resistors and the input-source impedance. A capacitor in parallel with the feedback resistor reduces the amount of clock feedthrough to the output by limiting the closed-loop bandwidth of the device.The design of the MAX4238/MAX4239 minimizes the effects of settling and charge injection to allow specifi-cation of an input offset voltage of 0.1µV (typ) and less than 2.5µV over temperature (-40°C to +85°C).1/f Noise1/f noise, inherent in all semiconductor devices, is inversely proportional to frequency. 1/f noise increases 3dB/octave and dominates amplifier noise at lower fre-quencies. This noise appears as a constantly changing voltage in series with any signal being measured. The MAX4238/MAX4239 treat 1/f noise as a slow varying offset error, inherently canceling the 1/f noise.MAX4238/MAX4239Ultra-Low Offset/Drift, Low-Noise,Precision SOT23 Amplifiers_______________________________________________________________________________________7Typical Operating Characteristics (continued)(V CC = 5V, V CM = 0V, R L = 10k Ωconnected to V CC /2, SHDN = V CC , T A = +25°C, unless otherwise noted.)SHUTDOWN WAVEFORMMAX4238/39 toc20R L = 10k ΩC L = 100pF10µs/divOUT2V/div1V/divSHDNDC TO 10Hz NOISEMAX4238/39 toc19V CC = 2.5V V EE = -2.5V1s/divOUT 2µV/divM A X 4238/M A X 4239Output Overload RecoveryAutozeroing amplifiers typically require a substantial amount of time to recover from an output overload. This is due to the time it takes for the null amplifier to correct the main amplifier to a valid output. The MAX4238/MAX4239 require only 3.3ms to recover from an output overload (see El ectrical Characteristics and Typical Operating Characteristics ).ShutdownThe MAX4238/MAX4239 feature a low-power (0.1µA)shutdown mode. When SHDN is pulled low, the clock stops and the device output enters a high-impedance state. Connect SHDN to V CC for normal operation.Applications InformationMinimum and Maximum GainConfigurationsThe MAX4238 is a unity-gain stable amplifier with a gain-bandwidth product (GBWP) of 1MHz. The MAX4239 is decompensated for a GBWP of 6.5MHz and is stable with a gain of 10V/V. Unlike conventional operational ampli-fiers, the MAX4238/MAX4239 have a maximum gain specification. To maintain stability, set the gain of the MAX4238 between A V = 1000V/V to 1V/V, and set the gain of the MAX4239 between A V = 6700V/V and 10V/V.ADC Buffer AmplifierThe low offset, fast settling time, and 1/f noise cancella-tion of the MAX4238/MAX4239 make these devices ideal for ADC buffers. The MAX4238/MAX4239 are well suited for low-speed, high-accuracy applications such as strain gauges (see Typical Application Circuit ).Error Budget ExampleWhen using the MAX4238/MAX4239 as an ADC buffer,the temperature drift should be taken into account when determining the maximum input signal. With a typical off-set drift of 10nV/°C, the drift over a 10°C range is 100nV.Setting this equal to 1/2LSB in a 16-bit system yields a full-scale range of 13mV. With a single 2.7V supply, an acceptable closed-loop gain is A V = 200. This provides sufficient gain while maintaining headroom.Chip InformationTRANSISTOR COUNT: 821PROCESS: BiCMOSUltra-Low Offset/Drift, Low-Noise, Precision SOT23 Amplifiers 8_______________________________________________________________________________________MAX4238/MAX4239Ultra-Low Offset/Drift, Low-Noise,Precision SOT23 Amplifiers_______________________________________________________________________________________9Package Information(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,go to /packages .)M A X 4238/M A X 4239Ultra-Low Offset/Drift, Low-Noise, Precision SOT23 Amplifiers Maxim cannot assume responsibil ity for use of any circuitry other than circuitry entirel y embodied in a Maxim product. No circuit patent l icenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.10____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600©2002 Maxim Integrated ProductsPrinted USAis a registered trademark of Maxim Integrated Products.Package Information (continued)(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,go to /packages .)。

MAX1722EZK-T中文资料

GND 2
MAX1722
FB 3
4
OUT
THIN SOT23-5
Pin Configurations are continued at end of data sheet.
________________________________________________________________ Maxim Integrated Products
元器件交易网
19-1735; Rev 0; 7/01
1.5µA IQ, Step-Up DC-DC Converters in Thin SOT23-5
General Description
The MAX1722/MAX1723/MAX1724 compact, high-efficiency, step-up DC-DC converters are available in tiny, 5pin thin SOT23 packages. They feature an extremely low 1.5µA quiescent supply current to ensure the highest possible light-load efficiency. Optimized for operation from one to two alkaline or nickel-metal-hydride (NiMH) cells, or a single Li+ cell, these devices are ideal for applications where extremely low quiescent current and ultra-small size are critical. Built-in synchronous rectification significantly improves efficiency and reduces size and cost by eliminating the need for an external Schottky diode. All three devices feature a 0.5Ω N-channel power switch. The MAX1722/ MAX1724 also feature proprietary noise-reduction circuitry, which suppresses electromagnetic interference (EMI) caused by the inductor in many step-up applications. The family offers different combinations of fixed or adjustable outputs, shutdown, and EMI reduction (see Selector Guide). o o o o o o o o o o o

MAX1873数据手册的中文翻译

简单的限流开关模式Li +电池充电控制器--------------------------------------------------------------------------概述低成本的MAX1873R/S/T提供所有功能需要对高达4A或以上的2 - ，3 - 或4 - 系列的锂离子电池进行简单而有效的充电。

它提供调节充电电流和电压，少于±0.75％时，总电压在电池端出现错误。

在降压的DC - DC配置下，外部P沟道MOSFET有效地为电池充电，这是低成本的设计。

MAX1873R/S/T使用两个控制回路调节电池电压和充电电流，一起工作的两个控制回路在电压和电流调节之间顺利转换。

一个额外的控制回路限制电流来自输入端，可以使AC适配器尺寸和成本最小化。

模拟电压还提供其输出正比于充电电流，以便ADC或微控制器可以监控充电电流。

在多化学充电器设计时，MAX1873也可能被用来作一个有效的有限电流源对镍镉或镍氢电池充电。

MAX1873R/S/T采用节省空间的16引脚QSOP封装是可用的。

使用评估板（MAX1873EVKIT），可以帮助减少设计时间。

--------------------------------------------------------------------------应用笔记本电脑便携式网络片2 - ，3 - ，或4节锂离子电池充电器6 - ，9 – 10节镍电池充电器手持式仪表便携式桌面助理（PDA）台式插座充电器引脚配置在数据资料的最后。

--------------------------------------------------------------------------特征•低成本和简单电路•可对2 - ，3 - ，或4节串联锂离子电池充电•AC适配器输入电流限制回路•还可对以镍为主的电池充电•模拟输出监视充电电流•± 0.75％的电池调节电压•5μA关断电池电流•输入电压高达28V•200mV的压差电压/100％占空比•可调充电电流•为300kHz的PWM振荡器降低了噪音•采用节省空间的16引脚QSOP•采用MAX1873评估板以加快设计----------------------------------------------------------------------订购信息部分温度 .范围 PIN的封装MAX1873REEE -40 °C至85 °C 16 QSOPMAX1873SEEE-40 °C至85 °C16 QSOPMAX1873TEEE-40 °C至85 °C16 QSOP------------------------------------------------------------------典型工作电路极限值CSSP，CSSN，DCIN接GND ·······················- 0.3V至30V VL，ICHG / EN接GND ························- 0.3V至6V VH，EXT接DCIN ····························- 6V至0.3V VH，EXT接GND ·······················( V DCIN 0.3V） - 0.3V EXT接VH ······························6V至- 0.3V DCIN接VL······························30V至- 0.3V VADJ，REF，CCI，CCV，CCS， IOUT接GND··············- 0.3V至（VL 0.3V）BATT，CSB接GND···························- 0.3V至20V CSSP接CSSN·····························- 0.3V至0.6V CSB接BATT·····························- 0.3V至0.6V VL源电流··································+50mA VH反向电流································+40mA 连续功耗（TA=70℃）16引脚QSOP封装（在70° C以上，功率衰减8.3mW/° C···········+667mW 工作温度范围MAX1873_EEE·····················-40°C至+85°C 结点温度································+150 °C 存储温度范围··························-65°C至+150°C 引线温度（焊接，10S)···························300°C 超出“绝对最大额定值”中所列的压力可能会造成设备的永久性损坏。

MAX3207EAUT+中文资料

General DescriptionThe MAX3205E/MAX3207E/MAX3208E low-capaci-tance, ±15kV ESD-protection diode arrays with an inte-grated transient voltage suppressor (TVS) clamp are suitable for high-speed and general-signal ESD protec-tion. Low input capacitance makes these devices ideal for ESD protection of signals in H DTV, PC monitors (DVI™, HDMI™), PC peripherals (FireWire ®, USB 2.0),server interconnect (PCI Express™, Infiniband ®), datacom, and interchassis interconnect. Each channel consists of a pair of diodes that steer ESD current puls-es to V CC or GND.The MAX3205E/MAX3207E/MAX3208E protect against ESD pulses up to ±15kV H uman Body Model, ±8kV Contact Discharge, and ±15kV Air-Gap Discharge, as specified in IEC 61000-4-2. An integrated TVS ensures that the voltage rise seen on V CC during an ESD event is clamped to a known voltage. These devices have a 2pF input capacitance per channel, and a channel-to-channel capacitance variation of only 0.05pF, making them ideal for use on high-speed, single-ended, or dif-ferential signals.The MAX3207E is a two-channel device suitable for USB 1.1, USB 2.0 (480Mbps), and USB OTG applica-tions. The MAX3208E is a four-channel device for Ethernet and FireWire applications. The MAX3205E is a six-channel device for cell phone connectors and SVGA video connections.The MAX3205E is available in 9-bump, tiny chip-scale (UCSP™), and 16-pin, 3mm x 3mm, thin QFN pack-ages. The MAX3207E is available in a small 6-pin SOT23 package. The MAX3208E is available in 10-pin µMAX ®and 16-pin, 3mm x 3mm TQFN packages. All devices are specified for the -40°C to +125°C automo-tive operating temperature range.ApplicationsDVI Input/Output Protection Set-Top Boxes PDAs/Cell Phones Graphics Controller Cards Displays/ProjectorsHigh-Speed, Full-Speed and Low-Speed USB Port ProtectionFireWire IEEE 1394 Ports Consumer EquipmentHigh-Speed Differential Signal ProtectionFeatures♦Low Input Capacitance of 2pF Typical♦Low Channel-to-Channel Variation of 0.05pF from I/O to I/O♦High-Speed Differential or Single-Ended ESD Protection±15kV–Human Body Model±8kV–IEC 61000-4-2, Contact Discharge ±15kV–IEC 61000-4-2, Air-Gap Discharge ♦Integrated Transient Voltage Suppressor (TVS)♦Optimized Pinout for Minimized Stub Instances on Controlled-Impedance Differential-Transmission Line Routing♦-40°C to +125°C Automotive Operating Temperature Range♦UCSP Packaging AvailableMAX3205E/MAX3207E/MAX3208EDual, Quad, and Hex High-Speed Differential ESD-Protection ICsOrdering Information19-3361; Rev 2; 3/05For pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at .*EP = Exposed pad.FireWire is a registered trademark of Apple Computer, Inc.PCI Express is a trademark of PCI-SIG Corporation.DVI is a trademark of Digital Display Working Group.HDMI is a trademark of HDMI Licensing, LCC.InfiniBand is a registered trademark of InfiniBand Trade Association.UCSP is a trademark and µMAX is a registered trademark of Maxim Integrated Products, Inc.Typical Operating Circuit and Pin Configurations appear at end of data sheet.M A X 3205E /M A X 3207E /M A X 3208EDual, Quad, and Hex High-Speed Differential ESD-Protection ICs 2_______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGSELECTRICAL CHARACTERISTICSStresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.Note 3:Guaranteed by design, not production tested.V CC to GND...........................................................-0.3V to +6.0V I/O_ to GND................................................-0.3V to (V CC + 0.3V)Continuous Power Dissipation (T A = +70°C)6-Pin SOT23 (derate 8.7mW/°C above +70°C)............696mW 9-Pin UCSP (derate 4.7mW/°C above +70°C).............379mW 10-Pin µMAX (derate 5.6mW/°C above +70°C)...........444mW 16-Pin Thin QFN (derate 20.8mW/°C above +70°C).1667mWOperating Temperature Range .........................-40°C to +125°C Storage Temperature Range.............................-65°C to +150°C Junction Temperature .....................................................+150°C Lead Temperature (soldering, 10s).................................+300°C Bump Temperature (soldering)Infrared (15s)...............................................................+220°C Vapor Phase (60s).......................................................+215°CMAX3205E/MAX3207E/MAX3208EDual, Quad, and Hex High-Speed Differential ESD-Protection ICs_______________________________________________________________________________________3CLAMP VOLTAGE vs. DC CURRENTDC CURRENT (mA)C L A M P V O L T A G E (V )130110907050300.50.70.91.11.31.50.310150LEAKAGE CURRENT vs. TEMPERATUREM A X 3205E t o c 02TEMPERATURE (°C)L E K A G E C U R R E N T (p A )804010100100010,0001-40120INPUT CAPACITANCE vs. INPUT VOLTAGEM A X 3205E t o c 03INPUT VOLTAGE (V)I N P U T C A P A C I T A N C E (p F )43211234005Typical Operating Characteristics(V CC = +5V, T A = +25°C, unless otherwise noted.)M A X 3205E /M A X 3207E /M A X 3208EDetailed DescriptionThe MAX3205E/MAX3207E/MAX3208E low-capacitance,±15kV ESD-protection diode arrays with an integrated transient voltage suppressor (TVS) clamp are suitable for high-speed and general-signal ESD protection. Low input capacitance makes these devices ideal for ESD protection of signals in HDTV, PC monitors (DVI, HDMI),PC peripherals (FireWire, USB 2.0), Server Interconnect (PCI Express, Infiniband), Datacom, and Inter-Chassis Interconnect. Each channel consists of a pair of diodes that steer ESD current pulses to V CC or GND. The MAX3205E, MAX3207E, and MAX3208E are two, four,and six channels (see the Functional Diagram ).The MAX3205E/MAX3207E/MAX3208E are designed to work in conjunction with a device’s intrinsic ESD pro-tection. The MAX3205E/MAX3207E/MAX3208E limit theexcursion of the ESD event to below ±25V peak voltage when subjected to the H uman Body Model waveform.When subjected to the IEC 61000-4-2 waveform, the peak voltage is limited to ±60V when subjected to Contact Discharge. The peak voltage is limited to ±100V when subjected to Air-Gap Discharge. The device protected by the MAX3205E/MAX3207E/MAX3208E must be able to withstand these peak volt-ages, plus any additional voltage generated by the par-asitic of the board.A TVS is integrated into the MAX3205E/MAX3207E/MAX3208E to help clamp ESD to a known voltage. This helps reduce the effects of parasitic inductance on the V CC rail by clamping V CC to a known voltage during an ESD event. For the lowest possible clamp voltage dur-ing an ESD event, placing a 0.1µF capacitor as close to V CC as possible is recommended.Dual, Quad, and Hex High-Speed Differential ESD-Protection ICs 4_______________________________________________________________________________________Functional DiagramApplications InformationDesign ConsiderationsMaximum protection against ESD damage results from proper board layout (see the Layout Recommendations section). A good layout reduces the parasitic series inductance on the ground line, supply line, and protect-ed signal lines. The MAX3205E/MAX3207E/MAX3208E ESD diodes clamp the voltage on the protected lines during an ESD event and shunt the current to GND or V CC . In an ideal circuit, the clamping voltage (V C ) is defined as the forward voltage drop (V F ) of the protec-tion diode, plus any supply voltage present on the cath-ode.For positive ESD pulses:V C = V CC + V F For negative ESD pulses:V C =-V FThe effect of the parasitic series inductance on the lines must also be considered (Figure 1).For positive ESD pulses:For negative ESD pulses:where, I ESD is the ESD current pulse.During an ESD event, the current pulse rises from zeroto peak value in nanoseconds (Figure 2). For example,in a 15kV IEC-61000 Air-Gap Discharge ESD event, the pulse current rises to approximately 45A in 1ns (di/dt =45 x 109). An inductance of only 10nH adds an addi-tional 450V to the clamp voltage, and represents approximately 0.5in of board trace. Regardless of the device’s specified diode clamp voltage, a poor layout with parasitic inductance significantly increases the effective clamp voltage at the protected signal line.Minimize the effects of parasitic inductance by placing the MAX3205E/MAX3207E/MAX3208E as close to the connector (or ESD contact point) as possible.A low-ESR 0.1µF capacitor is recommended between V CC and GND in order to get the maximum ESD protec-tion possible. This bypass capacitor absorbs the charge transferred by a positive ESD event. Ideally, the supply rail (V CC ) would absorb the charge caused by a positive ESD strike without changing its regulated value. All power supplies have an effective output impedance on their positive rails. If a power supply’s effective output impedance is 1Ω, then by using V = I x R, the clamping voltage of V C increases by the equa-tion V C = I ESD x R OUT . A +8kV IEC 61000-4-2 ESD event generates a current spike of 24A. The clamping voltage increases by V C = 24A x 1Ω, or V C = 24V.Again, a poor layout without proper bypassing increas-es the clamping voltage. A ceramic chip capacitor mounted as close as possible to the MAX3205E/MAX3207E/MAX3208E V CC pin is the best choice for this application. A bypass capacitor should also beplaced as close to the protected device as possible.MAX3205E/MAX3207E/MAX3208EDual, Quad, and Hex High-Speed Differential ESD-Protection ICs_______________________________________________________________________________________5Figure 1. Parasitic Series InductanceFigure 2. IEC 61000-4-2 ESD Generator Current WaveformM A X 3205E /M A X 3207E /M A X 3208E±15kV ESD ProtectionESD protection can be tested in various ways. The MAX3205E/MAX3207E/MAX3208E are characterized for protection to the following limits:•±15kV using the Human Body Model•±8kV using the Contact Discharge Method specified in IEC 61000-4-2•±15kV using the IEC 61000-4-2 Air-Gap Discharge MethodESD Test ConditionsESD performance depends on a number of conditions.Contact Maxim for a reliability report that documents test setup, methodology, and results.Human Body ModelFigure 3 shows the H uman Body Model, and Figure 4shows the current waveform it generates when dis-charged into a low impedance. This model consists of a 100pF capacitor charged to the ESD voltage of inter-est, which is then discharged into the device through a 1.5k Ωresistor.IEC 61000-4-2The IEC 61000-4-2 standard covers ESD testing and performance of finished equipment. The MAX3205E/MAX3207E/MAX3208E help users design equipment that meets Level 4 of IEC 61000-4-2. The main differ-ence between tests done using the Human Body Modeland IEC 61000-4-2 is higher peak current in IEC 61000-4-2. Because series resistance is lower in the IEC 61000-4-2 ESD test model (Figure 5), the ESD-withstand voltage measured to this standard is general-ly lower than that measured using the H uman Body Model. Figure 2 shows the current waveform for the ±8kV, IEC 61000-4-2 Level 4, ESD Contact Discharge test. The Air-Gap Discharge test involves approaching the device with a charged probe. The Contact Discharge method connects the probe to the device before the probe is energized.Dual, Quad, and Hex High-Speed Differential ESD-Protection ICs 6_______________________________________________________________________________________Figure 4. Human Body Model Current WaveformLayout RecommendationsProper circuit-board layout is critical to suppress ESD-induced line transients (See Figure 6). The MAX3205E/MAX3207E/MAX3208E clamp to 100V; however, with improper layout, the voltage spike at the device can be much higher. A lead inductance of 10nH with a 45A current spike results in an additional 450V spike on the protected line. It is essential that the layout of the PC board follows these guidelines:1)Minimize trace length between the connector or input terminal, I/O_, and the protected signal line.2)Use separate planes for power and ground to reduce parasitic inductance and to reduce the impedance to the power rails for shunted ESD current.3)Ensure short low-inductance ESD transient return paths to GND and V CC .4)Minimize conductive power and ground loops.5)Do not place critical signals near the edge of the PC board.6)Bypass V CC to GND with a low-ESR ceramic capaci-tor as close to V CC as possible.7)Bypass the supply of the protected device to GND with a low-ESR ceramic capacitor as close to the supply pin as possible.UCSP Applications InformationFor the latest application details on UCSP construction,dimensions, tape carrier information, printed circuit board techniques, bump-pad layout, and recommend-ed reflow temperature profile, as well as the latest infor-mation on reliability testing results, go to the Maxim website at /ucsp for the Application Note, UCSP—A Wafer-Level Chip-Scale Package .Chip InformationDIODE COUNT:MAX3205E: 7MAX3207E: 3MAX3208E: 5PROCESS: BiCMOSMAX3205E/MAX3207E/MAX3208EDual, Quad, and Hex High-Speed Differential ESD-Protection ICs_______________________________________________________________________________________7Typical Operating CircuitM A X 3205E /M A X 3207E /M A X 3208EDual, Quad, and Hex High-Speed Differential ESD-Protection ICs 8_______________________________________________________________________________________Pin ConfigurationsMAX3205E/MAX3207E/MAX3208EDual, Quad, and Hex High-Speed Differential ESD-Protection ICs_______________________________________________________________________________________9Package Information(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,go to /packages .)M A X 3205E /M A X 3207E /M A X 3208EDual, Quad, and Hex High-Speed Differential ESD-Protection ICs 10______________________________________________________________________________________Package Information (continued)(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,go to /packages .)MAX3205E/MAX3207E/MAX3208EDual, Quad, and Hex High-Speed Differential ESD-Protection ICs______________________________________________________________________________________11Package Information (continued)(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,go to /packages .)M A X 3205E /M A X 3207E /M A X 3208EDual, Quad, and Hex High-Speed Differential ESD-Protection ICs 12______________________________________________________________________________________Package Information (continued)(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,go to /packages .)Dual, Quad, and Hex High-SpeedDifferential ESD-Protection ICs Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses areimplied. Maxim reserves the right to change the circuitry and specifications without notice at any time.Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________13©2005 Maxim Integrated Products Printed USAis a registered trademark of Maxim Integrated Products, Inc. Package Information (continued)(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,go to /packages.)MAX3205E/MAX3207E/MAX3208E。

MAX4236-MAX4237高精度运算放大器简介

MAX4236/MAX4237高精度运算放大器简介MAX4236/MAX4237 为高精度运放，在不采用斩波技术的情况下取得了优异的低失调电压和低失调电压温度系数。

MAX4236 和MAX4237 的典型大信号开环电压增益为120dB。

这些器件的输入偏置电流极小，仅为1pA。

MAX4236 的增益带宽积为1.7MHz，单位增益稳定。

而MAX4237 可稳定工作于大于5V/V 的闭环增益，增益带宽积为7.5MHz。

两种器件均有关断功能，使静态电流降至小于0.1µA，输出呈高阻态。

MAX4236/MAX4237 的共模输入范围可低于负电源，输出可达到满摆幅。

这些特性使其非常适合于采用+3V 或+5V 单电源供电的应用。

MAX4236/MAX4237 的额定温度范围为-40°C 至+85°C，可提供微型SOT23，µMAX®和SO 封装。

对于较高精度的应用，A 级µMAX 和SO 封装的器件经过测试可以保证在+25°C 下失调不超过20µV，漂移小于2µV/°C。

关键特性超低失调电压20µV (最大值，A 级，+25°C) 50µV (最大值，B 级，6 引脚SOT23，+25°C)超低失调漂移2µV/°C (最大值，A 级) 4.5µV/°C (最大值，B 级，6 引脚SOT23) 5.5µV/°C (最大值，6 引脚SOT23)超低输入偏置电流：1pA 高开环电压增益：110dB (最小值，RL = 100kΩ) 适用于+3V 和+5V 单电源系统输入允许到地：共模输入范围覆盖电源负端驱动1kΩ负载时输出可达满摆幅350µA 静态电流增益带宽积 1.7MHz (MAX4236，AV = 1V/V) 7.5MHz (MAX4237，AV = 5V/V)具有带200pF 容性负载的能力关断模式：静态电流仅0.1µA，输出置于高阻状态提供节省空间的SOT23 和µMAX 封装应用/使用。

MAX4237EUT+T中文资料

MAX4237EUT+T中文资料General DescriptionThe MAX4236/MAX4237 are high-precision op amps that feature an exceptionally low offset voltage and off-set voltage temperature coefficient without using any chopper techniques. The MAX4236 and MAX4237 have a typical large-signal, open-loop voltage gain of 120dB.These devices have an ultra-low input-bias current of 1pA. The MAX4236 is unity-gain stable with a gain-bandwidth product of 1.7MHz, while the MAX4237 is stable for closed-loop gains greater than 5V/V with a gain-bandwidth product of 7.5MHz. Both devices have a shutdown function in which the quiescent current is reduced to less than 0.1μA, and the amplifier output is forced into a high-impedance state.The input common-mode range of the MAX4236/MAX4237 extends below the negative supply range, and the output swings Rail-to-Rail ?. These features make the amplifiers ideal for applications with +3V or +5V single power supplies. The MAX4236/MAX4237 are specified for the extended temperature range (-40°C to +85°C) and are available in tiny SOT23, μMAX, and SO packages. For greater accuracy, the A grade μMAX and SO packages are tested to guarantee 20μV (max) offset voltage at +25°C and less then 2μV/°C drift.ApplicationsStrain Gauges Piezoelectric Sensors Thermocouple Amplifiers Electrochemical Sensors Battery-Powered Instrumentation Instrumentation AmplifiersFeatureso Ultra-Low Offset Voltage20μV (max) at +25°C (Grade A)50μV (max) at +25°C (Grade B, 6-Pin SOT23)o Ultra-Low Offset Voltage Drift2μV/°C (max) (Grade A)4.5μV/°C (max) (Grade B, 6-Pin SOT23)5.5μV/°C (max) (6-Pin SOT23)o Ultra-Low 1pA Input Bias Currento High Open-Loop Voltage Gain: 110dB (min)(R L = 100k ?)o Compatible with +3V and +5V Single-Supply Power Systems o Ground Sensing: Input Common-Mode Range Includes Negative Rail o Rail-to-Rail Output Swing into a 1k ?Load o 350μA Quiescent Current o Gain-Bandwidth Product1.7MHz (MAX4236, A V = 1V/V)7.5MHz (MAX4237, A V = 5V/V)o 200pF Capacitive Load Handling Capability o Shutdown Mode: 0.1μA Quiescent Current, Places Output in a High-Impedance State o Available in Space-Saving SOT23 and μMAX PackagesMAX4236/MAX4237SOT23, Very High Precision, 3V/5VRail-to-Rail Op Amps________________________________________________________________ Maxim Integrated Products 1Pin ConfigurationsOrdering Information19-2110; Rev 0; 8/01For pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-4642, or visitMaxim’s website at /doc/041864369.html .Rail-to-Rail is a registered trademark of Nippon Motorola, Inc.M A X 4236/M A X 4237SOT23, Very High Precision, 3V/5V Rail-To-Rail Op Amps 2___________________________________________________________________ ____________________ABSOLUTE MAXIMUM RATINGSELECTRICAL CHARACTERISTICS (SO-8 and μMAX-8)(V= +2.4V to +5.5V, V = 0, V = 0, V = V /2, R = 100k ?to V /2, T = T to T , unless otherwise noted. Typical Stresses beyond those listed u nder “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.Supply Voltage (V CC - V EE )......................................-0.3V to +6V Analog Input Voltage (IN+ or IN-)....(V EE - 0.3V) to (V CC + 0.3V)Logic Input Voltage (SHDN )............(V EE - 0.3V) to (V CC + 0.3V) Current into Any Pin............................................................20mA Output Short-Circuit Duration....Continuous to Either V CC or V EE Continuous Power Dissipation (T A = +70°C)6-Pin SOT23-6 (derate 8.7mW/°C above +70°C).........696mW 8-Pin μMAX (derate 4.5mW/°C above +70°C)..............362mW 8-Pin SO (derate 5.9mW/°C above +70°C)...................471mWOperating Temperature Range ...........................-40°C to +85°C Junction Temperature......................................................+150°C Storage Temperature Range.............................-65°C to +150°C Lead Temperature (soldering, 10s).................................+300°CMAX4236/MAX4237SOT23, Very High Precision, 3V/5VRail-To-Rail Op Amps________________________________________________________________ _______________________3ELECTRICAL CHARACTERISTICS (SO-8 and μMAX-8) (continued)(V CC = +2.4V to +5.5V, V EE = 0, V CM = 0, V OUT = V CC /2, R L = 100k ?to V CC /2, T A = T MIN to T MAX , unless otherwise noted. Typical values are at V CC = +5V and T A = +25°C.) (Note 1)M A X 4236/M A X 4237SOT23, Very High Precision, 3V/5V Rail-To-Rail Op AmpsELECTRICAL CHARACTERISTICS (SO-8 and μMAX-8) (continued)(V CC = +2.4V to +5.5V, V EE = 0, V CM = 0, V OUT = V CC /2, R L = 100k ?to V CC /2, T A = T MIN to T MAX , unless otherwise noted. Typical values are at V CC = +5V and T A = +25°C.) (Note 1)ELECTRICAL CHARACTERISTICS (SOT23-6)(V CC = +2.4V to +5.5V, V EE = 0, V CM = 0, V OUT = V CC /2, R L = 100k ?to V CC /2, T A = T MIN to T MAX , unless otherwise noted. Typical values are at V CC = +5V and T A =+25°C.) (Note 1)MAX4236/MAX4237SOT23, Very High Precision, 3V/5VRail-To-Rail Op AmpsELECTRICAL CHARACTERISTICS (SOT23-6) (continued)(V CC = +2.4V to +5.5V, V EE = 0, V CM = 0, V OUT = V CC /2, R L = 100k ?to V CC /2, T A = T MIN to T MAX , unless otherwise noted. Typical values are at V CC = +5V and T A = +25°C.) (Note 1)M A X 4236/M A X 4237SOT23, Very High Precision, 3V/5V Rail-To-Rail Op Amps 6___________________________________________________________________ ____________________42108612141618-10-6-4-8-2246810V OS DISTRIBUTIONV OS (μV)P E R C E N T O F U N I T S (%)515102025TCV OS DISTRIBUTIONTCV OS (μV/°C)P E R C E N T O F U N I T S (%)-2.0-1.5-1.0-0.50.51.0 1.52.0OFFSET VOLTAGE vs. TEMPERATUREM A X 4236 t o c 02-80-60-20-40406020080O F F S E T V O L T A G E (μV )-5025-255075100125TEMPERATURE (°C)Typical Operating Characteristics(V CC = +5V, V EE = 0, V CM = V CC /2, R L = 100k ?to V CC /2, T A = +25°C, unless otherwise noted.)ELECTRICAL CHARACTERISTICS (SOT23-6) (continued)(V= +2.4V to +5.5V, V = 0, V = 0, V = V /2, R = 100k ?to V /2, T = T to T , unless otherwise noted. Typical unless otherwise specified.Note 2:Guaranteed by design, not production tested.Note 3:Maxim specification limits for the temperature coefficient of the offset voltage (TCV OS ) are 100% tested for the A-grade, 8-pin SO and μMAX packages.MAX4236/MAX4237SOT23, Very High Precision, 3V/5VRail-To-Rail Op Amps________________________________________________________________ _______________________704020806012010014003.0COMMON-MODE REJECTION RATIO vs. COMMON-MODE INPUT VOLTAGECOMMON-MODE INPUT VOLTAGE (V)C O M M O N -M O DE R E J E C T I O N R A T I O (d B )2.02.51.51.00.5COMMON-MODE REJECTION RATIOvs. FREQUENCY (V CC = 5V)M A X 4236 t o c 06FREQUENCY (kHz)C O M M O N -M ODE R E J E C T I O N R A T I O (d B )12004060801000.011010010000.1110,00020COMMON-MODE REJECTION RATIOvs. FREQUENCY (V CC = 3V)M A X 4236 t o c 07FREQUENCY (kHz)C O M M O N -M ODE R E J E C T I O N R A T I O (d B ) 14004060801000.011010010000.1110,000201201200.1110100100010,0001008040200POWER-SUPPLY REJECTION RATIO vs. FREQUENCY (V CC = 5V)M A X 4236 t o c 08FREQUENCY (kHz)P S S R (d B )600.0011010000.10.01110010,000100,000MAX4237OPEN-LOOP GAIN/PHASEvs. FREQUENCY FREQUENCY (kHz)G A I N (d B )-20206014012010080400P H A S E (D E G R E E S )Typical Operating Characteristics (continued)(V CC = +5V, V EE = 0, V CM = V CC /2, R L = 100k ?to V CC /2, T A = +25°C, unless otherwise noted.)0.0011010000.10.01110010,000MAX4236OPEN-LOOP GAIN/PHASEFREQUENCY (kHz)G A I N (d B )-20206014012010080400P H A S E (D E G R E E S )25201510500.011100.1100INPUT VOLTAGE NOISE vs. FREQUENCYM A X 4236 t o c 11FREQUENCY (kHz)I N P U T VO L T A G E N O I S E (n V √H z )10.00011010010k100kTOTAL HARMONIC DISTORTION 0.0010.010.1FREQUENCY (Hz)T H D + N O I S E (%)1k 040208060120100140021345COMMON-MODE REJECTION RATIO vs. COMMON-MODE INPUT VOLTAGEM A X 4236 t o c 05COMMON-MODE INPUT VOLTAGE (V)C O M M O N -M ODE R E J E C T I O N R A T I O (d B )V CC = 5VM A X 4236/M A X 4237SOT23, Very High Precision, 3V/5V Rail-To-Rail Op Amps 8___________________________________________________________________ ____________________300330320310350340390380370360400-50-25255075100125SUPPLY CURRENT vs. TEMPERATURETEMPERATURE (°C)S U P P L Y C U R R E N T (μA )Typical Operating Characteristics (continued)(V CC = +5V, V EE = 0, V CM = V CC /2, R L = 100k ?to V CC /2, T A = +25°C, unless otherwise noted.)3153253203353303403452.53.54.03.04.55.05.5SUPPLY CURRENT vs. SUPPLY VOLTAGESUPPLY VOLTAGE (V)S U P P L Y C U R R E N T (μA )6080100120LARGE-SIGNAL GAIN vs. TEMPERATURE TEMPERATURE (°C)G A I N (d B )140-502550-257510012501510525204540353050-50-25255075100125MINIMUM OUTPUT VOLTAGEvs. TEMPERATURETEMPERATURE (°C)M I N I M U M O U T P U T V O L T A G E(m V )60402010080180160140120200-50-25255075100125MAXIMUM OUTPUT VOLTAGEvs. TEMPERATURETEMPERATURE (°C)M A X I M U M O U T P U T V O L T A G E (m V ) 604020801001201401601802003.03.54.04.55.0OUTPUT VOLTAGE vs. SUPPLY VOLTAGESUPPLY VOLTAGE (V)O U T P U T V O L T A G E (m V )00.51.01.52.02.53.03.54.03.03.54.04.55.0OUTPUT VOLTAGE vs. SUPPLY VOLTAGESUPPLY VOLTAGE (V)O U T P U T V O L T A G E (m V )642810122.01.50.5 1.0 2.53.0 3.54.0 4.55.0OUTPUT SOURCE CURRENT vs. OUTPUT VOLTAGE OUTPUT VOLTAGE (V)O U T P U T S O U R C E C U R R E N T (mA )321456789101.00.51.52.02.53.0OUTPUT SOURCE CURRENT vs. OUTPUT VOLTAGE OUTPUT VOLTAGE (V)O U T P U T S O U R C E C U R R E N T (m A )MAX4236/MAX4237SOT23, Very High Precision, 3V/5VRail-To-Rail Op Amps_______________________________________________________________________________________90201030607050408001.0 1.52.0 2.50.53.0 3.54.0 4.55.0OUTPUT SINK CURRENT vs. OUTPUT VOLTAGEOUTPUT VOLTAGE (V)O U T P U T S I N K C U R R E N T (m A )2010403050600 1.0 1.50.5 2.0 2.5 3.0OUTPUT SINK CURRENT vs. OUTPUT VOLTAGEOUTPUT VOLTAGE (V)O U T P U T S I N K C U R R E N T (m A )05101520SHORT-CIRCUIT CURRENT vs. TEMPERATURETEMPERATURE (°C)S H O R T -C I R C U I T C U R R E N T (m A )-502550-2575100125Typical Operating Characteristics (continued)(V CC = +5V, V EE = 0, V CM = V CC /2, R L = 100k ?to V CC/2, T A = +25°C, unless otherwise noted.)SHORT-CIRCUIT CURRENTvs. TEMPERATURE0515103035252040S H O R T -C I R C U I T C U R R E N T (m A )-5025-255075100125TEMPERATURE (°C)-2.5-1.0-1.5-2.0-0.500.51.01.52.02.5-100-50050100DC I/O TRANSFER CURVE(R LOAD = 100k ?)DIFFERENTIAL INPUT VOLTAGE (μV)O U T P U T V O L T A G E (V )-2.5-1.0-1.5-2.0-0.500.51.01.52.02.5-100-50050100DC I/O TRANSFER CURVE(R LOAD = 1k ?)DIFFERENTIAL INPUT VOLTAGE (μV)O U T P U T V O L T A G E (V )1μs/divMAX4236NONINVERTING SMALL-SIGNAL RESPONSEINPUT 10mV/divOUTPUT 10mV/divMAX4236 toc28V CC = ±2.5VR L = 1k ?, C L = 15pF A V = 1V/V1μs/divMAX4237NONINVERTING SMALL-SIGNAL RESPONSEINPUT 10mV/divOUTPUT 50mV/divMAX4236 toc29V CC = ±2.5VR L = 1k ?, C L = 15pF A V = 5V/VM A X 4236/M A X 4237SOT23, Very High Precision, 3V/5V Rail-To-Rail Op Amps 10 ________________________________________________________________ ______________________2μs/divMAX4237NONINVERTING LARGE-SIGNAL RESPONSEINPUT 200mV/divOUTPUT 1V/divMAX4236 toc30V CC = ±2.5VR L = 1k ?, C L = 15pF A V = 5V/VTypical Operating Characteristics (continued)(V CC = +5V, V EE = 0, V CM = V CC /2, R L = 100k ?to V CC /2, T A = +25°C, unless otherwise noted.)MAX4236 toc31INPUT 1V/divMAX4236 toc32MAX4236 toc33MAX4236/MAX4237SOT23, Very High Precision, 3V/5VRail-To-Rail Op Amps________________________________________________________________ ______________________11Detailed DescriptionThe MAX4236/MAX4237 are high-precision op amps with a CMOS input stage and an excellent set of DC and AC features. The combination of tight maximum voltage offset, low offset tempco and very low input current make them ideal for use in high-precision DC circuits. They feature low-voltage operation, low-power consumption, high-current drive with rail-to-rail output swing and high-gain bandwidth product.High AccuracyThe MAX4236/MAX4237 maximum input offset voltage is 20μV (5μV, typ) for grade A version and 50μV for grade B version at +25°C. The maximum temperature coefficient of the offset voltage f or grade A and B are guaranteed to be 2μV/°C and 4.5μV/°C respectively.The parts have an input bias current of 1pA. Noise characteristics are 14nV/√Hz , and a low frequency noise (0.1Hz to 10Hz) of 0.2μVp-p. The CMRR is 102dB, and the PSRR is 120dB. The combination is what is necessary for the design of circuits to process signals while keeping high signal-to-noise ratios, as in stages preceding high-resolution converters, or when they are produced by sensors or transducers generat-ing very small outputs.Rail-to-Rail Outputs, Ground-Sensing InputThe input common-mode range extends from (V EE -0.15V) to (V CC - 1.2V) with excellent common-mode rejection. Beyondthis range, the amplifier output is a nonlinear function of the input, but does not undergo phase reversal or latch-up (see Typical Operating Characteristics ).The output swings to within 150mV of the power-supply rails with a 1k ?load. The input ground sensing and the rail-to-rail output substantially increase the dynamic range.Power-Up and Shutdown ModeThe MAX4236/MAX4237 have a shutdown option.When the shutdown pin (SHDN ) is pulled low, the sup-ply current drops to 0.1μA, and the amplifiers are dis-abled with the output in a high-impedance state. Pulling SHDN high enables the amplifiers. The turn-on time for the amplifiers to come out of shutdown is 4μs.Applications InformationAs described above, the characteristics of the MAX4236/MAX4237 are excellent for high-precision/accuracy circuitry, and the high impedance, low-cur-rent, low-offset, and noise specifications are very attractive for piezoelectric transducers applications. In these applications, the sensors generate an amount of electric charge proportional to the changes in the mechanical stress applied to them. These charges are transformed into a voltage proportional to the applied force by injecting them into a capacitance and then amplifying the resulting voltage. The voltage is an inverse function of the capacitance into which the charges generated by the transducer/ sensor are injected. This capacitance and the resistance that dis-charges it, define the low-frequency response of the circuit. It is desirable, once the preferred low-frequency response is known, to maintain the capacitance as low as possible, because the amount of necessary upstream amplification (and the signal-to-noise ratio deterioration) is directly proportional to thecapacitance value. The MAX4236/MAX4237 high-impedance, low-Pin DescriptionM A X 4236/M A X 4237SOT23, Very High Precision, 3V/5V Rail-To-Rail Op Amps 12__________________________________________________________________ ____________________current, low-noise inputs allow a minimum of capaci-tance to be used.Piezoresistive transducers applications require many of the same qualities. For those applications the MAX4236/MAX4237 high CMRR, PSRR, and offset sta-bility are also a good match.A typical application for a piezoresistive transducer instrumentation amplifier design using the MAX4236/MAX4237 is shown in the Typical Application Circuit .In general, the MAX4236/MAX4237 are good compo-nents for any application in which an amplifier with an almost zero input current is required, including high-precision, long time-constant integrators and electro-chemical sensors.Power SuppliesThe MAX4236/MAX4237 can operate from a single +2.4V to +5.5V power supply, or from ±1.2V to ±2.75V power supplies. The power supply pin(s) must be bypassed to ground with a 0.1μF capacitor as close to the pin as possible.Layout and Physical DesignA good layout improves performance by decreasing the amount of parasitic and stray capacitance, induc-tance and resistance at the amplifier ’s inputs, outputs,and power-supplyconnections. Since parasitics might be unavoidable, minimize trace lengths, resistor leads,and place external components as close to the pins as possible.In high impedance, low input current applications, input lines guarding and shielding, special grounding, and other physical design and layout techniques, are mandatory if good results are expected.The negative effects of crosstalk, EMI and other forms of interference and noise (thermal, acoustic, etc.) must be accounted for and prevented beforehand for good performance in the type of sensitive circuitry in which the MAX4236/MAX4237 are likely to be used.Selector GuideTypical Application CircuitChip InformationTRANSISTOR COUNTS: 224PROCESS: BiCMOSMAX4236/MAX4237SOT23, Very High Precision, 3V/5VRail-To-Rail Op Amps________________________________________________________________ ______________________13Package InformationM A X 4236/M A X 4237SOT23, Very High Precision, 3V/5V Rail-To-Rail Op Amps Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuitpatent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.14____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600?2001 Maxim Integrated ProductsPrinted USAis a registered trademark of Maxim Integrated Products.Package Information (continued)。

MAX3087ESA中文资料

375
256
MAX3084
Full
0.5
Yes
No
No
375
256
MAX3085
Half
0.5
Yes
Yes
Yes
375
256
MAX3086
Full
10
No
Yes
Yes
375
256
MAX3087
Full
10
No
No
No
375
256
MAX3088
Half
10
No
Yes
Yes
375
256
MAX3089 Selectable Selectable Selectable
These transceivers typically draw 375µA of supply current when unloaded, or when fully loaded with the drivers disabled.
All devices have a 1/8-unit-load receiver input impedance that allows up to 256 transceivers on the bus. The MAX3082/MAX3085/MAX3088 are intended for halfduplex communications, while the MAX3080/MAX3081/ MAX3083/MAX3084/MAX3086/MAX3087 are intended for full-duplex communications. The MAX3089 is selectable between half-duplex and full-duplex operation. It also features independently programmable receiver and transmitter output phase via separate pins.

MEMORY存储芯片MAX4372TEUK中文规格书

Low-Cost, Precision, High-Side Current-Sense Amplifier
Electrical Characteristics (continued)
(V+ = +3V to +32V; VRS+, VRS- = 0 to 32V; TA = TMIN to TMAX; unless otherwise noted. Typical values are at V+ = +12V, VRS+ = 12V, TA = +25°C.)
V+ (V)
IOUT = 0mA
30
40
PARAMETER Operating Voltage Range Input Voltage Range Supply Current Input Offset Voltage
Positive Input Bias Current Negative Input Bias Current Maximum VSENSE Voltage Low-Level Current Error
PARAMETER
SYMBOL
CONDITIONS
MIN
Maximum Output Voltage (OUT)
IOUT ≤ 1.5mA
Bandwidth Maximum Output Current Transconductance
V+ Threshold for PG Output Low (Note 2)
TYP MAX UNITS
V+ - 1.2 V
800
kHz
200
1.75
mA
10 10.2 mA/V

MAX4372TEUK中文资料

For pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at .General DescriptionThe MAX4372 low-cost, precision, high-side current-sense amplifier is available in a tiny, space-saving SOT23-5-pin package. Offered in three gain versions (T = 20V/V, F = 50V/V, and H = 100V/V), this device operates from a single 2.7V to 28V supply and con-sumes only 30µA. It features a voltage output that elimi-nates the need for gain-setting resistors and is ideal for today’s notebook computers, cell phones, and other systems where battery/DC current monitoring is critical.High-side current monitoring is especially useful in bat-tery-powered systems since it does not interfere with the ground path of the battery charger. The input com-mon-mode range of 0 to 28V is independent of the sup-ply voltage and ensures that the current-sense feedback remains viable even when connected to a 2-cell battery pack in deep discharge.The user can set the full-scale current reading by choosing the device (T, F, or H ) with the desired volt-age gain and selecting the appropriate external sense resistor. This capability offers a high level of integration and flexibility, resulting in a simple and compact cur-rent-sense solution. For higher bandwidth applications,refer to the MAX4173T/F/H data sheet.ApplicationsPower-Management SystemsGeneral-System/Board-Level Current Monitoring Notebook ComputersPortable/Battery-Powered Systems Smart-Battery Packs/Chargers Cell PhonesPrecision-Current SourcesFeatures♦Low-Cost, Compact Current-Sense Solution♦30µA Supply Current ♦2.7V to 28V Operating Supply ♦0.18% Full-Scale Accuracy ♦0.3mV Input Offset Voltage ♦Low 1.5ΩOutput Impedance ♦Three Gain Versions Available20V/V (MAX4372T)50V/V (MAX4372F)100V/V (MAX4372H)♦Wide 0 to 28V Common-Mode Range,Independent of Supply Voltage♦Available in a Space-Saving 5-Pin SOT23 Package and 3 x 2 UCSP™(1mm x 1.5mm) PackageMAX4372T/F/HLow-Cost, UCSP/SOT23, Micropower, High-Side Current-Sense Amplifier with Voltage Output________________________________________________________________Maxim Integrated Products119-1548; Rev 3; 12/05Pin ConfigurationsOrdering InformationTypical Operating CircuitNote:Gain values are as follows: 20V/V for the T version, 50V/V for the F version, and 100V/V for the H version.Ordering Information continued at end of datasheet.UCSP is a trademark of Maxim Integrated Products, Inc.M A X 4372T /F /HCurrent-Sense Amplifier with Voltage OutputABSOLUTE MAXIMUM RATINGSELECTRICAL CHARACTERISTICS(V RS+= 0 to 28V, V CC = 2.7V to 28V, V SENSE = 0, R LOAD = 1M Ω, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.) (Note 1)Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.V CC , RS+, RS- to GND...........................................-0.3V to +30V OUT to GND...........................................................-0.3V to +15V Differential Input Voltage (V RS+- V RS-)..............................±0.3V Current into Any Pin..........................................................±10mA Continuous Power Dissipation (T A = +70°C)5-Pin SOT23 (derate 7.1mW/°C above +70°C).............571mW 8-Pin SO (derate 5.88mW/°C above +70°C).................471mW 3 x 2 UCSP (derate 3.4mW/°C above +70°C)...........273.2mWOperating Temperature Range ...........................-40°C to +85°C Storage Temperature Range.............................-65°C to +150°C Lead Temperature (soldering, 10s).................................+300°C Bump Temperature (soldering)Infrared (15s)................................................................+200°C Vapor Phase (20s)........................................................+215°CMAX4372T/F/HCurrent-Sense Amplifier with Voltage Output_______________________________________________________________________________________3ELECTRICAL CHARACTERISTICS (continued)(V RS+= 0 to 28V, V CC = 2.7V to 28V, V SENSE = 0, R LOAD = 1M Ω, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.) (Note 1)Note 1:All devices are 100% production tested at T A = +25°C. All temperature limits are guaranteed by design.Note 2:Guaranteed by PSR test.Note 3:Guaranteed by OUT Voltage Error test.Note 4:Output voltage is internally clamped not to exceed 12V.Note 5:V OS is extrapolated from the gain accuracy tests.Note 6:Total OUT voltage error is the sum of gain and offset voltage errors.Note 7:Measured at I OUT = -500µA (R LOAD = 4k Ωfor gain = 20V/V, R LOAD = 10k Ωfor gain = 50V/V, R LOAD = 20k Ωfor gain =100V/V).Note 8:6.25mV = 1/16 of 100mV full-scale voltage (C/16).Note 9:The device will not reverse phase when overdriven.M A X 4372T /F /HCurrent-Sense Amplifier with Voltage Output 4_______________________________________________________________________________________Typical Operating Characteristics(V CC = 12V, V RS+= 12V, V SENSE = 100mV, T A = +25°C, unless otherwise noted.)25.027.530.032.535.0SUPPLY CURRENT vs. SUPPLY VOLTAGESUPPLY VOLTAGE (V)S U P P L Y C U R R E N T (µA )1216482024280510152025303540-401060-153585SUPPLY CURRENT vs. TEMPERATURETEMPERATURE (°C)S U P P L Y C U R R E N T (µA )28.029.028.530.029.531.531.030.532.0SUPPLY CURRENTvs. COMMON-MODE VOLTAGECOMMON-MODE VOLTAGE (V)S U P P L Y C U R R E N T (µA )-1.2-0.8-1.0-0.2-0.4-0.60.40.200.610515202530TOTAL OUTPUT ERROR vs. SUPPLY VOLTAGESUPPLY VOLTAGE (V)O U T P U T E R R O R (%)00.20.40.60.81.01.21.41.6010515202530TOTAL OUTPUT ERROR vs. COMMON-MODE VOLTAGECOMMON-MODE VOLTAGE (V)O U T P U T E R R O R (%)-1.0-0.50.51.01.510050150200250300TOTAL OUTPUT ERROR vs. V SENSEV SENSE (mV)O U T P U T E R R O R (%)-45-90100100k10k 1k POWER-SUPPLY REJECTIONvs. FREQUENCY-75-85-55-65-40-70-80-50-60M A X 4372T t o c 06FREQUENCY (Hz)P S R (d B )-1.0-0.9-0.8-0.7-0.6-0.5-0.4-0.3-0.2-0.10GAIN ACCURACY vs. TEMPERATURETEMPERATURE (°C)G A I N A C C U R A C Y (%)-401060-153585-1.0-0.8-0.6-0.4-0.200.20.40.60.81.0-401060-153585TOTAL OUTPUT ERROR vs. TEMPERATURETEMPERATURE (°C)T O T A L O U T P U T E R R O R (%)V OUTV SENSE600mV200mV30mV10mVMAX4372TSMALL-SIGNAL TRANSIENT RESPONSEMAX4372T toc1020µs/div V OUTV SENSE1.5V0.5V30mV 10mVMAX4372FSMALL-SIGNAL TRANSIENT RESPONSEMAX4372T toc1120µs/div V OUTV SENSE3V1V30mV10mVMAX4372HSMALL-SIGNAL TRANSIENT RESPONSEMAX4372T toc1220µs/divV OUTV SENSE1V3V50mV 150mV MAX4372TLARGE-SIGNAL TRANSIENT RESPONSEMAX4372T toc1320µs/divV OUTV SENSE2.5V7.5V50mV 150mVMAX4372FLARGE-SIGNAL TRANSIENT RESPONSE20µs/divMAX4372T toc143-81k100k10k1MSMALL-SIGNAL GAIN vs. FREQUENCY-7FREQUENCY (Hz)G A I N (d B )-6-5-4-3-2-1012V OUTV SENSE10V0100mVMAX4372HLARGE-SIGNAL TRANSIENT RESPONSE20µs/div MAX4372T toc15MAX4372T/F/HCurrent-Sense Amplifier with Voltage Output_______________________________________________________________________________________5Typical Operating Characteristics (continued)(V CC = 12V, V RS+= 12V, V SENSE = 100mV, T A = +25°C, unless otherwise noted.)_______________Detailed DescriptionThe MAX4372 high-side current-sense amplifier fea-tures a 0 to 28V input common-mode range that is inde-pendent of supply voltage. This feature allows the monitoring of current flow out of a battery in deep dis-charge, and also enables high-side current sensing at voltages far in excess of the supply voltage (V CC ).Current flows through the sense resistor, generating a sense voltage (Figure 1). Since A1’s inverting input is high impedance, the voltage on the negative terminal equals V IN - V SENSE . A1 forces its positive terminal to match its negative terminal; therefore, the voltage across R G1(V IN - V1-) equals V SENSE . This creates a current to flow through R G1equal to V SENSE / R G1. The transistor and current mirror amplify the current by a factor of β. This makes the current flowing out of the current mirror equal to:I M = βV SENSE / R G1A2’s positive terminal presents high impedance, so this current flows through R GD , with the following result:V2+ = R GD β·V SENSE / R G1R1 and R2 set the closed-loop gain for A2, which ampli-fies V2+, yielding:V OUT = R GD ·β·V SENSE / R G1(1 + R2 / R1) The gain of the device equals:V OUT= R GD ·β(1 + R2 / R1) / R G1V SENSE__________Applications InformationRecommended Component ValuesThe MAX4372 operates over a wide variety of current ranges with different sense resistors. Table 1 lists com-mon resistor values for typical operation of the MAX4372.Choosing R SENSEGiven the gain and maximum load current, select R SENSE such that V OUT does not exceed V CC - 0.25V or 10V. To measure lower currents more accurately, use a high value for R SENSE . A higher value develops a higher sense voltage, which overcomes offset voltage errors of the internal current amplifier.In applications monitoring very high current, ensure R SENSE is able to dissipate its own I 2R losses. If the resistor’s rated power dissipation is exceeded, its value may drift or it may fail altogether, causing a differential voltage across the terminals in excess of the absolute maximum ratings.M A X 4372T /F /HCurrent-Sense Amplifier with Voltage Output 6_______________________________________________________________________________________Pin DescriptionFigure 1. Functional DiagramMAX4372T/F/HCurrent-Sense Amplifier with Voltage Output_______________________________________________________________________________________7Using a PC Board Trace as R SENSEIf the cost of R SENSE is an issue and accuracy is not critical, use the alternative solution shown in Figure 2.This solution uses copper PC board traces to create a sense resistor. The resistivity of a 0.1-inch-wide trace of 2-ounce copper is about 30m Ω/ft. The resistance tem-perature coefficient of copper is fairly high (approxi-mately 0.4%/°C), so systems that experience a wide temperature variance must compensate for this effect.In addition, self-heating will introduce a nonlinearity error. Do not exceed the maximum power dissipation of the copper trace.For example, the MAX4372T (with a maximum load cur-rent of 10A and an R SENSE of 5m Ω) creates a full-scale V SENSE of 50mV that yields a maximum V OUT of 1V.R SENSE , in this case, requires about 2 inches of 0.1-inch-wide copper trace.UCSP Applications InformationFor the latest application details on UCSP construction,dimensions, tape carrier information, printed circuit board techniques, bump-pad layout, and recommend-ed reflow temperature profile, as well as the latest infor-mation on reliability testing results, go to the Maxim's website at /ucsp to find the Application Note: UCS P—A Wafer-Level Chip-S cale Package.Table 1. Recommended Component ValuesFigure 2. Connections Showing Use of PC BoardM A X 4372T /F /HCurrent-Sense Amplifier with Voltage Output 8_______________________________________________________________________________________Chip InformationTRANSISTOR COUNT: 225PROCESS: BiCMOSPin Configurations (continued)Ordering Information (continued)Package Information(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,go to /packages .)Note : MAX4372_EBT uses package code B6-2.MAX4372T/F/HCurrent-Sense Amplifier with Voltage Output_______________________________________________________________________________________9Package Information (continued)(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,go to /packages .)M A X 4372T /F /HCurrent-Sense Amplifier with Voltage Output Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.10____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600©2005 Maxim Integrated ProductsPrinted USAis a registered trademark of Maxim Integrated Products, Inc.Package Information (continued)(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,go to /packages .)。

CAT4237TD-GT3;CAT4237TD-T3;中文规格书,Datasheet资料

CAT4237High Voltage CMOS Boost White LED DriverDescriptionThe CAT4237 is a DC/DC step−up converter that delivers an accurate constant current ideal for driving LEDs. Operation at a constant switching frequency of 1 MHz allows the device to be used with small value external ceramic capacitors and inductor. LEDs connected in series are driven with a regulated current set by the external resistor R1. LED currents up to 40 mA can be supported over a wide range of input supply voltages from 2.8 V to 5.5 V, making the device ideal for battery−powered applications. The CAT4237 high−voltage output stage is perfect for driving six, seven or eight white LEDs in series with inherent current matching in LCD backlight applications.LED dimming can be done by using a DC voltage, a logic signal, or a pulse width modulation (PWM) signal. The shutdown input pin allows the device to be placed in power−down mode with “zero”quiescent current.In addition to thermal protection and overload current limiting, the device also enters a very low power operating mode during “Open LED” fault conditions. The device is housed in a low profile (1mm max height) 5−lead thin SOT23 package for space critical applications.Features•Drives 6 to 8 White LEDs in Series from 3 V•Up to 87% Efficiency•Low Quiescent Ground Current 0.6 mA•Adjustable Output Current (up to 40 mA)•High Frequency 1 MHz Operation•High V oltage Power Switch•Shutdown Current Less than 1 m A•Open LED Low Power Mode•Automatic Shutdown at 1.9 V (UVLO)•Thermal Shutdown Protection•Thin SOT23 5−lead (1 mm Max Height)•These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS CompliantApplications•Color LCD and Keypad Backlighting•Cellular Phones•Handheld Devices•Digital Cameras•PDAs•Portable Game MachineTSOT−23TD SUFFIXCASE 419AEPIN CONNECTIONSUDYMMARKING DIAGRAMSDevice Package Shipping (Note 4)ORDERING INFORMATION (Note 3)CAT4237TD−T3(Note 1)TSOT−23(Pb−Free)3,000/Tape & Reel LT = CAT4237TD−T3UD = CAT4237TD−GT3Y = Production Year (Last Digit)M = Production Month (1−9, A, B, C)(Top View)VINSHDNSWGNDFB1LTYMCAT4237TD−GT3(Note 2)TSOT−23(Pb−Free)3,000/Tape & Reel1.Matte−Tin Plated Finish (RoHS−compliant).2.NiPdAu Plated Finish (RoHS−compliant)3.For detailed information and a breakdown ofdevice nomenclature and numbering systems, please see the ON Semiconductor Device No-menclature document, TND310/D, available at 4.For information on tape and reel specifications, in-cluding part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifica-tions Brochure, BRD8011/D.Figure 1. Typical Application CircuitL: Sumida CDRH3D16−330D: Central CMDSH05−4 (rated 40 V)C2: Taiyo Yuden UMK212BJ224 (rated 50 V)V IN Table 1. ABSOLUTE MAXIMUM RATINGSParametersRatings Units V IN , FB voltage −0.3 to +7V SHDN voltage −0.3 to +7V SW voltage−0.3 to +55V Storage Temperature Range −65 to +160_C Junction Temperature Range −40 to +150_C Lead Temperature300_CStresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.Table 2. RECOMMENDED OPERATING CONDITIONSParametersRange Units V IN2.8 to 5.5V SW pin voltage0 to 30V Ambient Temperature Range −40 to +85_C 6, 7 or 8 LEDs1 to 40mANOTE:Typical application circuit with external components is shown above.5.Thin SOT23−5 package thermal resistance q JA = 135°C/W when mounted on board over a ground plane.Table 3. DC ELECTRICAL CHARACTERISTICS(V IN = 3.6 V, ambient temperature of 25°C (over recommended operating conditions unless otherwise specified))Symbol Parameter Conditions Min Typ Max UnitI Q Operating Current V FB= 0.2 VV FB= 0.4 V (not switching)0.60.11.50.6mAI SD Shutdown Current V SHDN = 0 V0.11m A V FB FB Pin Voltage8 LEDs with I LED = 20 mA285300315mV I FB FB pin input leakage1m AI LED Programmed LED Current R1 = 10 WR1 = 15 WR1 = 20 W 28.51914.2530201531.52115.75mAV IH V IL SHDN Logic HighSHDN Logic LowEnable Threshold LevelShutdown Threshold Level0.40.80.71.5VF SW Switching Frequency0.8 1.0 1.3MHzI LIM Switch Current Limit350450600mAR SW Switch “On” Resistance I SW = 100 mA 1.0 2.0WI LEAK Switch Leakage Current Switch Off, V SW = 5 V15m AThermal Shutdown150°CThermal Hysteresis20°C V UVLO Undervoltage Lockout (UVLO) Threshold 1.9V V OV-SW Overvoltage Threshold35VPin DescriptionVIN is the supply input for the internal logic. The device is compatible with supply voltages down to 2.8 V and up to 5.5V. It is recommended that a small bypass ceramic capacitor (4.7 m F) be placed between the VIN and GND pins near the device. If the supply voltage drops below 1.9 V, the device stops switching.SHDN is the shutdown logic input. When the pin is tied to a voltage lower than 0.4 V, the device is in shutdown mode, drawing nearly zero current. When the pin is connected to a voltage higher than 1.5 V, the device is enabled.GND is the ground reference pin. This pin should be connected directly to the ground place on the PCB.SW pin is connected to the drain of the internal CMOS power switch of the boost converter. The inductor and the Schottky diode anode should be connected to the SW pin. Traces going to the SW pin should be as short as possible with minimum loop area. An over-voltage detection circuit is connected to the SW pin. When the voltage reaches 35V, the device enters a low power operating mode preventing the SW voltage from exceeding the maximum rating.FB feedback pin is regulated at 0.3 V. A resistor connected between the FB pin and ground sets the LED current according to the formula:I LED+0.3VR1The lower LED cathode is connected to the FB pin.Table 4. PIN DESCRIPTIONSPin #Name Function 1SW Switch pin. This is the drain of the internal power switch.2GND Ground pin. Connect the pin to the ground plane.3FB Feedback pin. Connect to the last LED cathode.4SHDN Shutdown pin (Logic Low). Set high to enable the driver.5VIN Power Supply input.Block DiagramDevice OperationThe CAT4237 is a fixed frequency (1 MHz), low noise,inductive boost converter that provides a constant current with excellent line and load regulation. The device uses a high-voltage CMOS power switch between the SW pin and ground to energize the inductor. When the switch is turned off, the stored energy in the inductor is released into the load via the Schottky diode.The on/off duty cycle of the power switch is internally adjusted and controlled to maintain a constant regulated voltage of 0.3 V across the feedback resistor connected to the feedback pin (FB). The value of the resistor sets the LED current accordingly (0.3 V/R 1).During the initial power-up stage, the duty cycle of the internal power switch is limited to prevent excessive in-rush currents and thereby provide a “soft-start” mode of operation.While in normal operation, the device can deliver up to 40mA of load current into a string of up to 8 white LEDs.In the event of an “Open LED” fault condition, where the feedback control loop becomes open, the output voltage will continue to increase. Once this voltage exceeds 35 V , an internal protection circuit will become active and place the device into a very low power safe operating mode where only a small amount of power is transferred to the output.This is achieved by pulsing the switch once every 60 m s and keep it on for about 1 m s only.Thermal overload protection circuitry has been included to prevent the device from operating at unsafe junction temperatures above 150°C. In the event of a thermal overload condition the device will automatically shutdown and wait till the junction temperatures cools to 130°C before normal operation is resumed.Light Load OperationUnder light load condition (under 4 mA) and with input voltage above 4.2 V , the CAT4237 driving 6 LEDs, the driver starts pulse skipping. Although the LED current remains well regulated, some lower frequency ripple may appear.Figure 3. Switching Waveform V IN = 4.2 V,I LED = 4 mAFigure 4. Quiescent Current vs. V IN(Not Switching)Figure 5. Quiescent Current vs. V IN(Switching)INPUT VOLTAGE (V)INPUT VOLTAGE (V)020406080100120140 5.04.54.03.53.02.500.51.01.52.0Figure 6. FB Pin Voltage vs. Supply VoltageFigure 7. FB Pin Voltage vs. Output CurrentINPUT VOLTAGE (V)OUTPUT CURRENT (mA)285290295300305310315285290295300305310315Figure 8. Switching Frequency vs. SupplyVoltageFigure 9. Switching WaveformsINPUT VOLTAGE (V)0.5 m sec/div4.54.23.94.83.63.33.02.7960980100010201040I N P U T C U R R E N T (m A )S U P P L Y C U R R E N T (m A )F E E D B A C K (m V )F B P I N V O L T AG E (m V )F R E Q U E N C Y (k H z )SW pin 20V/divInductor Current 100mA/divVOUT AC coupled 200mV/divFigure 10. LED Current vs. Input Voltage(8 LEDs)Figure 11. LED Current Regulation (20 mA)INPUT VOLTAGE (V)INPUT VOLTAGE (V)051015202530354.84.54.23.93.63.33.0−1.0−0.50.51.0Figure 12. 8 LED Efficiency vs. Load CurrentFigure 13. 8 LED Efficiency vs. Input VoltageLED CURRENT (mA)INPUT VOLTAGE (V)657075808590657075808590Figure 14. 7 LED Efficiency vs. Load Current Figure 15. 6 LED Efficiency vs. Load CurrentLED CURRENT (mA)LED CURRENT (mA)657075808590657075808590L E D C U R R E N T (m A )C U R R E N T V A R I A T I O N (%)E F F I C I E N C Y (%)E F F I C I E N C Y (%)E F F I C I E N C Y (%)E F F I C I E N C Y (%)Figure 16. Power −up with 8 LEDs at 20 mAFigure 17. Switch ON Resistance vs. InputVoltage50 m sec/divINPUT VOLTAGE (V)4.54.03.53.02.500.51.01.52.0Figure 18. FB Pin Voltage vs. TemperatureFigure 19. Shutdown Voltage vs. Input VoltageTEMPERATURE (°C)INPUT VOLTAGE (V)2972982993003013023030.20.40.60.81.0Figure 20. Maximum Output Current vs. InputVoltageINPUT VOLTAGE (V)020406080100120140S W I T C H R E S I S T A N C E (W )F E E D B A C K V O L T AG E (m V )S H U T D O W N V O L T A G E (V )M A X O U T P U T C U R R E N T (m A )EN 5V/divVOUT 10V/divInput Current 100mA/divApplication InformationExternal Component SelectionCapacitorsThe CAT4237 only requires small ceramic capacitors of 4.7m F on the input and 0.22 m F on the output. Under normal condition, a 4.7 m F input capacitor is sufficient. For applications with higher output power, a larger input capacitor of 10 m F may be appropriate. X5R and X7R capacitor types are ideal due to their stability across temperature range.InductorA 33 m H inductor is recommended for most of the CAT4237 applications. In cases where the efficiency is critical, inductances with lower series resistance are preferred. Inductors with current rating of 300 mA or higher are recommended for most applications. Sumida CDRH3D16−330 33 m H inductor has a rated current of 320mA and a series resistance (D.C.R.) of 520 m W typical. Schottky DiodeThe current rating of the Schottky diode must exceed the peak current flowing through it. The Schottky diode performance is rated in terms of its forward voltage at a given current. In order to achieve the best efficiency, this forward voltage should be as low as possible. The response time is also critical since the driver is operating at 1MHz. Central Semiconductor Schottky diode CMDSH05−4 (500mA rated) is recommended for most applications. LED Current SettingThe LED current is set by the external resistor R1 connected between the feedback pin (FB) and ground. The formula below gives the relationship between the resistor and the current:R1+0.3VLEDcurrentTable 5. RESISTOR R1 AND LED CURRENTLED Current (mA)R1 (W)56010301520201525123010Open LED ProtectionIn the event of an “Open LED” fault condition, the CAT4237 will continue to boost the output voltage with maximum power until the output voltage reaches approximately 35 V . Once the output exceeds this level, the internal circuitry immediately places the device into a very low power mode where the total input power is limited to about 4 mW (about 1 mA input current with a 3.6 V supply).The SW pin clamps at a voltage below its maximum rating of 60 V . There is no need to use an external zener diode between V out and the FB pin. A 50 V rated C 2 capacitor is required to prevent any overvoltage damage in the open LED condition.Figure 21. Open LED Protection without ZenerSchottky 100 V(Central CMSH1−100)V INV OUTFigure 22. Open LED Switching Waveforms withoutZener10 m sec/divSW PIN 10 V/divFigure 23. Open LED Supply Current vs. V IN withoutZenerINPUT VOLTAGE (V)5.04.54.03.53.02.500.51.01.52.0S U P P L Y C U R R E N T (m A )Figure 24. Open LED Output Voltage vs. V IN withoutZenerINPUT VOLTAGE (V)5.04.54.03.53.02.53035404550O U T P U T V O L T A G E (V )Dimming ControlThere are several methods available to control the LED brightness.PWM Signal on the SHDN PinLED brightness dimming can be done by applying a PWM signal to the SHDN input. The LED current is repetitively turned on and off, so that the average current is proportional to the duty cycle. A 100% duty cycle, with SHDN always high, corresponds to the LEDs at nominal current. Figure 25shows a 1kHz signal with a 50% duty cycle applied to the SHDN pin. The recommended PWM frequency range is from 100Hz to 2kHz.Figure 25. Switching Waveform with 1 kHz PWM onSHDN Filtered PWM SignalA filtered PWM signal used as a variable DC voltage can control the LED current. Figure 26 shows the PWM control circuitry connected to the CAT4237 FB pin. The PWM signal has a voltage swing of 0 V to 2.5 V . The LED current can be dimmed within a range from 0 mA to 20 mA. The PWM signal frequency can vary from very low frequency up to 100 kHz.Figure 26. Circuit for Filtered PWM Signal0 V2.5 V PWN Signal WA PWM signal at 0 V DC, or a 0% duty cycle, results in a max LED current of about 22 mA. A PWM signal with a 93% duty cycle or more, results in an LED current of 0mA.Figure 27. Filtered PWM Dimming (0 V to 2.5 V)L E D C U R R E N T (m A )2520151050102030405060708090100PWM DUTY CYCLE (%)分销商库存信息:ONSEMICAT4237TD-GT3CAT4237TD-T3。

MAX999EUK-T中文资料

TOP VIEW
Q1 GND 2
MAX999
5 VCC
IN+ 3
4 IN-
SOT23-5 Pin Configurations continued at end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
— — — — — — — — ACAB
PART NO. OF COMPARATORS COMPLEMENTARY OUTPUT SHUTDOWN LATCH ENABLE PACKAGE
__________________Pin Configurations
MAX961
1
MAX962
2
MAX963
PART
TEMP RANGE
PINPACKAGE
SOT TOP MARK
MAX961ESA -40°C to +85°C 8 SO
—
MAX961EUA MAX962ESA MAX962EUA MAX963ESD MAX964ESE MAX964EEE MAX997ESA MAX997EUA MAX999EUK-T
2
MAX964
4
MAX997
1
MAX999
1
Yes Yes Yes 8 SO/µMAX
No
No
No 8 SO/µMAX
Yes Yes Yes 14 SO
No
Yes
No 16 SO/QSOP
No
Yes
No 8 SO/µMAX
No

MA3X717E资料

元器件交易网
Schottky Barrier Diodes (SBD)
MA3X717D, MA3X717E
Silicon epitaxial planar type
For switching circuits I Features
• Two MA3X717s are contained in one package • Optimum for low-voltage rectification because of its low forward rise voltage (VF) (Low VF type of MA3X704D/E) • Optimum for high-frequency rectification because of its short reverse recovery time (trr)
2.8 − 0.3 0.65 ± 0.15 1.5
+ 0.25 − 0.05 + 0.2
Unit : mm
0.65 ± 0.15
0.95
1.9 ± 0.2
2.9 − 0.05
1 3 2
+ 0.2
0.95
1.45
1.1 − 0.1
I Absolute Maximum Ratings Ta = 25°C
0
5
10
15
20
25
30
Forward voltage VF (V)
Ambient temperature Ta (°C)
Reverse voltage VR (V)
Ct VR
3.2 2.8 f = 1 MHz Ta = 25°C
IR T a
104
Terminal capacitance Ct (pF)

MAX4173FEUT-T中文资料

Operating Temperature Range .......................... -40°C to +85°C Storage Temperature Range ............................ -65°C to +150°C Lead Temperature (soldering, 10s) ................................ +300°C
Ordering Information
PIN-PACKAGE 6 SOT23-6 8 SO 6 SOT23-6 8 SO 6 SOT23-6 8 SO
SOT TOP MARK AABN — AABO — AABP —
________________________________________________________________ Maxim Integrated Products 1
The MAX4173 operates from a single +3V to +28V supply, typically draws only 420µA of supply current over the extended operating temperature range (-40°C to +85°C), and is offered in the space-saving SOT23-6 package.
VSENSE = +100mV, VCC = +12V, VRS+ = +12V, TA = +25°C
VSENSE = +100mV, VCC = +28V, VRS+ = +28V VSENSE = +100mV, VCC = +12V, VRS+ = +0.1V

MAX471MAX472的中文资料大全

MAX471/MAX472的特点、功能美国美信公司生产的精密高端电流检测放大器是一个系列化产品，有MAX471/MAX472、MAX4172/MAX4173等。

它们均有一个电流输出端，可以用一个电阻来简单地实现以地为参考点的电流/电压的转换，并可工作在较宽电压内。

MAX471/MAX472具有如下特点：●具有完美的高端电流检测功能；●内含精密的内部检测电阻（MAX471）；●在工作温度范围内，其精度为2%；●具有双向检测指示，可监控充电和放电状态；●内部检测电阻和检测能力为3A，并联使用时还可扩大检测电流范围；●使用外部检测电阻可任意扩展检测电流范围（MAX472）；●最大电源电流为100μA；●关闭方式时的电流仅为5μA；●电压范围为3～36V；●采用8脚DIP/SO/STO三种封装形式。

MAX471/MAX472的引脚排列如图1所示，图2所示为其内部功能框图。

表1为MAX471/MAX472的引脚功能说明。

MAX471的电流增益比已预设为500μA/A，由于2kΩ的输出电阻（ROUT）可产生1V/A的转换，因此±3A时的满度值为3V.用不同的ROUT电阻可设置不同的满度电压。

但对于MAX471，其输出电压不应大于VRS+。

对于MAX472，则不能大于。

MAX471引脚图如图１所示，MAX472引脚图如图２所示。

MAX471/MAX472的引脚功能说明引脚名称功能MAX471MAX47211SHDN关闭端。

正常运用时连接到地。

当此端接高电平时，电源电流小于5μA2，3-RS+内部电流检测电阻电池（或电源端）。

“+”仅指示与SIGN输出有关的流动方向。

封装时已将2和3连在了一起-2空脚88OUT 电流输出，它正比于流过TSENSE被测电路的幅度，在MAX741中，此引脚到地之间应接一个2kΩ电阻，每一安培被测电流将产生大小等于1V的电压OUT端为电流幅度输出端，而SIGN端可用来指示输出电流的方向。

MAX4823ETP-T中文资料

General DescriptionThe MAX4822–MAX4825 8-channel relay drivers offer built-in kickback protection and drive +3V/+5V non-latching or dual-coil-latching relays. Each independent open-drain output features a 2.7Ω(typ) on-resistance and is guaranteed to sink 70mA (min) of load current.These devices consume less than 300µA (max) quies-cent current and have 1µA output off-leakage current.A Zener-kickback-protection circuit significantly reduces recovery time in applications where switching speed is critical.The MAX4822/MAX4824 feature a unique power-save mode where the relay current, after activation, can be reduced to a level just above the relay hold-current threshold. This mode keeps the relay activated while significantly reducing the power consumption.The MAX4822/MAX4823 feature a 10MH z SPI™-/QSPI™-/MICROWIRE™-compatible serial interface.Input data is shifted into a shift register and latched to the outputs when CS transitions from low to high. Each data bit in the shift register corresponds to a specific output, allowing independent control of all outputs. The MAX4824/MAX4825 feature a 4-bit parallel-input interface. The first 3 bits (A0, A1, A2) determine the out-put address, and the fourth bit (LVL) determines whether the selected output is switched on or off. Data is latched to the outputs when CS transitions from low to high.The MAX4822–MAX4825 feature separate set and reset functions, allowing turn-on or turn-off of all outputs simultaneously with a single control line. Built-in hys-teresis (Schmidt trigger) on all digital inputs allows these devices to be used with slow-rising and falling signals, such as those from optocouplers or RC power-up initialization circuits. The MAX4822–MAX4825 are available in space-saving 4mm x 4mm, 20-pin thin QFN packages. They are specified over the -40°C to +85°C extended temperature range.ApplicationsATE EquipmentDSL Redundancy Protection (ADSL/VDSL/HDSL)T1/E1 Redundancy Protection T3/E3 Redundancy Protection Industrial EquipmentTest Equipment (Oscilloscopes, Spectrum Analyzers)Features♦Built-In Zener Kickback Protection for Fast Recovery ♦Programmable Power-Save Mode Reduces Relay Power Consumption (MAX4822/MAX4824)♦10MHz SPI-/QSPI-/MICROWIRE-Compatible Serial Interface ♦Eight Independent Output Channels ♦Drive +3V and +5V Relays♦Guaranteed 70mA (min) Coil Drive Current ♦Guaranteed 5Ω(max) R ON♦SET / RESET Functions to Turn On/Off All Outputs Simultaneously ♦Serial Digital Output for Daisy Chaining ♦Optional Parallel Interface (MAX4824/MAX4825)♦Low 300µA (max) Quiescent Supply Current ♦Space-Saving, 4mm x 4mm, 20-Pin TQFN PackageMAX4822–MAX4825+3.3V/+5V , 8-Channel Relay Drivers with FastRecovery Time and Power-Save Mode________________________________________________________________Maxim Integrated Products1Ordering Information19-3789; Rev 0; 8/05For pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at .*For maximum heat dissipation, packages have an exposed pad (EP) on the bottom. Solder exposed pad to GND.SPI is a trademark of Motorola, Inc.QSPI is a trademark of Motorola, Inc.MICROWIRE is a trademark of National Semiconductor Corp.M A X 4822–M A X 4825+3.3V/+5V , 8-Channel Relay Drivers with Fast Recovery Time and Power-Save Mode 2_______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGSStresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.V CC ........................................................................-0.3V to +6.0V OUT_......................................................................-0.3V to +11V CS , SCLK, DIN, SET , RESET , A0, A1, A2, LVL......-0.3V to +6.0V DOUT..........................................................-0.3V to (V CC + 0.3V)PSAVE........................................................-0.3V to (V CC + 0.3V)Continuous OUT_ Current (all outputs turned on)............150mA Continuous OUT_ Current (single output turned on)........300mAContinuous Power Dissipation (T A = +70°C)20-Lead Thin QFN (derate 16.9mW/°C above +70°C)..1350mW Operating Temperature Range ...........................-40°C to +85°C Junction Temperature......................................................+150°C Storage Temperature Range.............................-65°C to +150°C Soldering Temperature (10s)...........................................+300°CELECTRICAL CHARACTERISTICSMAX4822–MAX4825+3.3V/+5V , 8-Channel Relay Drivers with FastRecovery Time and Power-Save Mode_______________________________________________________________________________________3ELECTRICAL CHARACTERISTICS (continued)M A X 4822–M A X 4825+3.3V/+5V , 8-Channel Relay Drivers with Fast Recovery Time and Power-Save Mode 4_______________________________________________________________________________________Note 4:The circuit can set the output voltage in power-save mode only if I OUT x R ON < V OUTP .Note 5:After relay turn-off, inductive kickback can momentarily cause the OUT_ voltage to exceed V CC . This is considered part of normal operation and does not damage the device.Note 6:Guaranteed by design.Note 7:For other capacitance values, use the equation t PS = 32 x C.ELECTRICAL CHARACTERISTICS (continued)(V CC = +2.7V to +5.5V, T A = -40°C to +85°C, unless otherwise noted. Typical values are at V CC = 2.7V, T A = +25°C, unless otherwise noted.) (Note 1)MAX4822–MAX4825+3.3V/+5V , 8-Channel Relay Drivers with FastRecovery Time and Power-Save Mode_______________________________________________________________________________________5QUIESCENT SUPPLY CURRENTvs. SUPPLY VOLTAGESUPPLY VOLTAGE (V)S U P P L Y C U R R E N T (µA )5.14.72.73.13.53.94.31451501551601651701751801402.35.5QUIESCENT SUPPLY CURRENTvs. TEMPERATURETEMPERATURE (°C)S U P P L Y C U R R E N T (µA )603510-15110120130140150160170180190200100-40850.200.600.401.201.000.801.601.801.402.0014523678910DYNAMIC SUPPLY CURRENTvs. FREQUENCYFREQUENCY (MHz)D Y N A M I C S U P P L Y C U R RE N T (m A )QUIESCENT SUPPLY CURRENT vs. LOGIC-INPUT VOLTAGELOGIC-INPUT VOLTAGE (V)S U P P L Y C U R R E N T (µA )432110020030040050060070080090010001100005ON-RESISTANCE vs. SUPPLY VOLTAGESUPPLY VOLTAGE (V)R O N (Ω)5.14.72.73.13.53.94.31.752.002.252.502.753.003.253.501.502.35.5ON-RESISTANCE vs. TEMPERATURETEMPERATURE (°C)R O N (Ω)603510-152.02.53.03.54.01.5-4085POWER-ON RESET VOLTAGEvs. TEMPERATUREM A X 4822-25 t o c 07TEMPERATURE (°C)P O W E R -O N R E S E T V O L T A G E (V )603510-151.051.101.151.201.251.301.351.401.451.501.551.601.651.701.00-4085OUTPUT OFF-LEAKAGE CURRENTvs. SUPPLY VOLTAGEM A X 4822-25 t o c 08SUPPLY VOLTAGE (V)O U T P U T O F F -L E A K A G E (pA )5.14.74.33.93.53.12.712345602.3 5.5OUTPUT OFF-LEAKAGE CURRENTvs. TEMPERATURETEMPERATURE (°C)O U T P U T O F F -L E A K A G E (n A )603510-150.010.11100.001-4085Typical Operating Characteristics(V CC = 3.3V, T A = +25°C, unless otherwise noted.)M A X 4822–M A X 4825+3.3V/+5V , 8-Channel Relay Drivers with Fast Recovery Time and Power-Save Mode 6_______________________________________________________________________________________OUT_ TURN-ON DELAY TIME vs. SUPPLY VOLTAGEM A X 4822-25 t o c 10SUPPLY VOLTAGE (V)I O N D E L A Y T I M E (n s )5.14.74.33.93.53.12.7406080100120140202.35.5OUT_ TURN-OFF DELAY TIMEvs. SUPPLY VOLTAGEM A X 4822-25 t o c 11SUPPLY VOLTAGE (V)I O F F D E L A Y T I M E (n s ) 5.14.74.33.93.53.12.760080010001200140016004002.3 5.5INPUT-LOGIC THRESHOLD vs. SUPPLY VOLTAGEM A X 4822-25 t o c 2SUPPLY VOLTAGE (V)I N P U T -L O G I C T H R E S H O L D (V )5.14.73.9 4.33.1 3.52.71.11.21.31.41.51.61.71.81.92.02.11.02.3 5.5BACK EMF CLAMPING WITH STANDARD 3V RELAY V CC = 3.3V MAX4822-25 toc13100µs/div0V0VCS 5V/divVOUT 2V/divPOWER-SAVE DELAY TIMEvs. CAPACITANCECAPACITANCE (nF)t P S (m s )800600200400510152030253540001000POWER-SAVE DELAY TIME vs. SUPPLY VOLTAGESUPPLY VOLTAGE (V)t P S (m s )5.14.73.94.33.13.52.73.553.603.653.703.753.803.853.903.954.003.502.35.50.30.40.60.50.70.810050150200250300OUTPUT VOLTAGE vs. OUTPUT CURRENTIN POWER-SAVE MODE (PSAVE REGISTER = 111)M A X 4822 t o c 16OUTPUT CURRENT (mA)O U T P U T V O L T A G E (V )Typical Operating Characteristics (continued)(V CC = 3.3V, T A = +25°C, unless otherwise noted.)MAX4822–MAX4825+3.3V/+5V , 8-Channel Relay Drivers with FastRecovery Time and Power-Save Mode_______________________________________________________________________________________7MAX4822/MAX4823 Pin DescriptionM A X 4822–M A X 4825+3.3V/+5V , 8-Channel Relay Drivers with Fast Recovery Time and Power-Save Mode 8_______________________________________________________________________________________MAX4822/MAX4823 Pin Description (continued)MAX4824/MAX4825 Pin DescriptionDetailed DescriptionSerial Interface (MAX4822/MAX4823)Depending on the MAX4822/MAX4823 device, the serial interface can be controlled by either 8- or 16-bit words as depicted in Figures 1 and 2. The MAX4823 does not support power-save mode, so the serial interface con-sists of an 8-bit-only shift register for faster control.The MAX4822 consists of a 16-bit shift register and par-allel latch controlled by SCLK and CS . The input to the shift register is a 16-bit word. In the MAX4822, the first 8 bits determine the register address and are followedsponds to the MSB of the 8-bit register address in Figure 1, while bit D7 corresponds to the MSB of the 8bits of data in the same Figure 1.The MAX4823 consists of an 8-bit shift register and par-allel latch controlled by SCLK and CS . The input to the shift register is an 8-bit word. Each data bit controls one of the eight outputs, with the most significant bit (D7) corresponding to OUT8, and the least significant bit (D0) corresponding to OUT1 (see Figure 2).MAX4822–MAX4825+3.3V/+5V , 8-Channel Relay Drivers with FastRecovery Time and Power-Save Mode_______________________________________________________________________________________9M A X 4822–M A X 4825When CS is low (MAX4822/MAX4823 device is select-ed), data at DIN is clocked into the shift register syn-chronously with SCLK’s rising edge. Driving CS from low to high latches the data in the shift register (Figures 5 and 6).DOUT is the output of the shift register. Data appears on DOUT synchronously with SCLK’s falling edge and is identical to the data at DIN delayed by eight clock cycles for the MAX4823, or 16 clock cycles for the MAX4822. When shifting the input data, A7 is the first input bit in and out of the shift register for the MAX4822device. D7 is the first bit in or out of the shift register for+3.3V/+5V , 8-Channel Relay Drivers with Fast Recovery Time and Power-Save Mode 10______________________________________________________________________________________Figure 1. 16-Bit Register Map for MAX4822the MAX4823 device. If the address A0…….A7 is not 00h or 01h, then the outputs and the PSAVE configura-tion register are not updated. The address is stored in the shift register only.While CS is low, the OUT_ outputs always remain in their previous state. For the MAX4823, drive CS high after 8bits of data have been shifted in to update the output state of the MAX4823, and to further inhibit data from entering the shift register. For the MAX4822, drive CS high after 16 bits of data have been shifted in to update the output state of the MAX4822, and to further inhibit data from entering the shift register. When CS is high, transi-tions at DIN and SCLK have no effect on the output, and the first input bit A7 (or D7) is present at DOUT.For the MAX4822, if the number of data bits entered while CS is low is greater or less than 16, the shift regis-ter contains only the last 16 bits, regardless of when they were entered. For the MAX4823, if the number of data bits entered while CS is low is greater or less than 8, the shift register contains only the last 8 data bits,regardless of when they were entered.Parallel Interface (MAX4824/MAX4825)The parallel interface consists of 3 address bits (A0,A1, A2) and one level selector bit (LVL). The address bits determine which output is updated, and the level bit determines whether the addressed output is switched on (LVL = high) or off (LVL = low). When CS is high, the address and level bits have no effect on the state of the outputs. Driving CS from low to high latchesMAX4822–MAX4825Recovery Time and Power-Save Mode______________________________________________________________________________________11Figure 4. 3-Wire Serial-Interface Timing DiagramFigure 2. 8-Bit Register Map for MAX4823M A X 4822–M A X 4825level data to the parallel register and updates the state of the outputs. Address data entered after CS is pulled low is not reflected in the state of the outputs following the next low-to-high transition on CS (Figure 7).SET/RESET FunctionsThe MAX4822–MAX4825 feature set and reset inputs that allow simultaneous turn-on or turn-off of all outputs using a single control line. Drive SET low to set all latch-es and registers to 1 and turn all outputs on. SET over-rides all serial/parallel control inputs. Drive RESET low to clear all latches and registers and to turn all outputs off. RESET overrides all other inputs including SET .Power-On ResetThe MAX4822–MAX4825 feature power-on reset. The power-on reset function causes all latches to be cleared automatically upon power-up. This ensures that all outputs come up in the off or high-impedance state.Applications InformationDaisy ChainingThe MAX4822/MAX4823 feature a digital output (DOUT) that provides a simple way to daisy chain multi-ple devices. This feature allows driving large banks of relays using only a single serial interface. To daisy chain multiple devices, connect all CS inputs together,and connect the DOUT of one device to the DIN of another device (see Figure 8). During operation, a stream of serial data is shifted through the MAX4822/MAX4823 devices in series. When CS goes high, all outputs update simultaneously.The MAX4822/MAX4823 can also be used in a slave configuration that allows individual addressing of devices. Connect all the DIN inputs together, and usethe CS input to address one device at a time. Drive CS low to select a slave and input the data into the shift register. Drive CS high to latch the data and turn on the appropriate outputs. Typically, in this configuration only one slave is addressed at a time.Power-Save ModeThe MAX4822/MAX4824 feature a unique power-save mode where the relay current, after activation, can be reduced to a level just above the relay hold-current threshold. This mode keeps the relay activated while significantly reducing the power consumption.In serial mode (MAX4822), choose between seven cur-rent levels ranging from 30% to 90% of the nominal cur-rent in 10% increments. The actual percentage is determined by the power-save configuration register (Figure 1).In parallel mode (MAX4824), the power-save current is fixed at 60% of the nominal current.Power-Save TimerEvery time there is a write operation to the device (CS transitions from low to high), the MAX4822/MAX4824start charging the capacitor connected to PSAVE. The serial power-save implementation is such that a write operation does not change the state of channels already in power-save mode (unless the write turns the channel OFF).After a certain time period, t PS (determined by the capacitor value), the capacitor reaches a voltage threshold that sets all active outputs to power-save mode. The t PS period should be made long enough to allow the relay to turn on completely. The time period t PS can be adjusted by using different capacitor valuesRecovery Time and Power-Save Mode 12______________________________________________________________________________________Figure 5. 3-Wire Serial-Interface Operation for MAX4822connected to PSAVE. The value t PS is given by the fol-lowing formula:t PS = 32 x Cwhere C is in µF and t PS is in ms.For example, if the desired t PS is 20ms, then the required capacitor value is 20 / 32 = 0.625µF.Power-Save Mode AccuracyThe current through the relay is controlled by setting the voltage at OUT_ to a percentage of the V CC supply as specified under the Electrical Characteristics and in the register description. The current through the relay (I OUT )depends on the switch on-resistance, R ON,in addition to the relay resistance R R according to the fol-lowing relation:I OUT = V CC / (R ON + R R )The power-save, current-setting I PS depends on the fraction αof the supply voltage V CC that is set by the loop depending on the following relation:I PS = V CC - (αx V CC ) / R RTherefore:I PS / I OUT = (1- α) x (1 + R ON / R R )This relation shows how the fraction of reduction in the current depends on the switch on-resistance, as well as from the accuracy of the voltage setting (α). The higher the R ON with respect to R R, the higher the inaccuracy.This is particularly true at low voltage when the relay resistance is low (less than 40Ω) and the switch can account for up to 10% of the total resistance. In addi-tion, when the supply-voltage setting (α) is low (10% or 20%) and the supply voltage (V CC ) is low, the voltage drop across the switch (I OUT x R ON ) may already exceed, or may be very close to, the desired voltage-setting value.Daisy Chaining and Power-Save ModeIn a normal configuration using the power-save feature,several MAX4822s can be daisy chained as shown in Figure 9. For each MAX4822, the power-save timing t PD (time it takes to reduce the relay current once the relay is actuated) is controlled by the capacitor con-nected to PSAVE.An alternative configuration that eliminates the PSAVE capacitors uses a common PSAVE control line driven by an open-drain n-channel MOSFET (Figure 10). In this con-figuration, the PSAVE inputs are connected together to asynchronously control the power-save timing for all the MAX4822s in the chain. The µC/µP drives the n-channel MOSFET low for the duration of a write cycle to the SPI chain, plus some delay time to allow the relays to close.(This time is typically specified in the relay data sheet.)Once this delay time has elapsed, the n-channel MOSFET is turned off, allowing the MAX4822’s internal 35µA pullup current to raise PSAVE to a logic-high level, activating the power-save mode in all active outputs.MOSFET SelectionIn the daisy-chain configuration of Figure 10, the n-channel MOSFET drives PSAVE low. When the n-channel MOSFET is turned off, PSAVE is pulled high by an internal 35µA pullup in each MAX4822, and the power-save mode is enabled. Because of the paralleled PSAVE pullup currents, the required size of the n-channel MOSFET depends upon the number of MAX4822 devices in the chain. Determine the size of the n-channel MOSFET by the following relation:R ON < 1428 / NMAX4822–MAX4825Recovery Time and Power-Save Mode______________________________________________________________________________________13Figure 6. 3-Wire Serial-Interface Operation for the MAX4823Figure 7. Parallel-Interface Timing DiagramM A X 4822–M A X 4825where N is the total number of MAX4822 devices in a single chain, and R ON is the on-resistance of the n-channel MOSFET in Ωs.For example, if N = 10:R ON < 142ΩAn n-channel MOSFET with R ON less than 142Ωis required for a daisy chain of 10 MAX4822 devices.Inductive Kickback Protection withFast Recovery TimeThe MAX4822–MAX4825 feature built-in inductive kick-back protection to reduce the voltage spike on OUT_generated by a relay’s coil inductance when the output is suddenly switched off. An internal Zener clamp allows the inductor current to flow back to ground. The Zener configuration significantly reduces the recovery time (time it takes to turn off the relay) when compared to protection configurations with just one diode across the coil.Recovery Time and Power-Save Mode 14______________________________________________________________________________________Figure 9. Daisy-Chained MAX4822s with a Capacitor Connected to PSAVEFigure 8. Daisy-Chain ConfigurationMAX4822–MAX4825Recovery Time and Power-Save Mode______________________________________________________________________________________15Figure 10. Daisy-Chaining MAX4822s with a PSAVE Connected to an n-Channel MOSFETChip InformationTRANSISTOR COUNT: 5799PROCESS: BiCMOSM A X 4822–M A X 4825Recovery Time and Power-Save Mode 16______________________________________________________________________________________MAX4822/MAX4823 Functional Diagram (Serial Interface)MAX4822–MAX4825Recovery Time and Power-Save Mode______________________________________________________________________________________17MAX4824/MAX4825 Functional Diagram (Parallel Interface)M A X 4822–M A X 4825Recovery Time and Power-Save Mode 18______________________________________________________________________________________Pin ConfigurationsRecovery Time and Power-Save Mode Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses areimplied. Maxim reserves the right to change the circuitry and specifications without notice at any time.Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________19©2005 Maxim Integrated Products Printed USAis a registered trademark of Maxim Integrated Products, Inc.MAX4822–MAX4825Package Information(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to /packages.)。

MAX232中文资料(官方版)

Part Number MAX220 MAX222 MAX223 (MAX213) MAX225 MAX230 (MAX200) MAX231 (MAX201) MAX232 (MAX202) MAX232A MAX233 (MAX203) MAX233A MAX234 (MAX204) MAX235 (MAX205) MAX236 (MAX206) MAX237 (MAX207) MAX238 (MAX208) MAX239 (MAX209) MAX240 MAX241 (MAX211) MAX242 MAX243 MAX244 MAX245 MAX246 MAX247 MAX248 MAX249 Power Supply (V) +5 +5 +5 +5 +5 +5 and +7.5 to +13.2 +5 +5 +5 +5 +5 +5 +5 +5 +5 +5 and +7.5 to +13.2 +5 +5 +5 +5 +5 +5 +5 +5 +5 +5 No. of RS-232 Drivers/Rx 2/2 2/2 4/5 5/5 5/0 2/2 2/2 2/2 2/2 2/2 4/0 5/5 4/3 5/3 4/4 3/5 5/5 4/5 2/2 2/2 8/10 8/10 8/10 8/9 8/8 6/10 No. of Ext. Caps 4 4 4 0 4 2 4 4 0 0 4 0 4 4 4 2 4 4 4 4 4 0 0 0 4 4 Nominal Cap. Value (µF) 0.047/0.33 0.1 1.0 (0.1) — 1.0 (0.1) 1.0 (0.1) 1.0 (0.1) 0.1 — — 1.0 (0.1) — 1.0 (0.1) 1.0 (0.1) 1.0 (0.1) 1.0 (0.1) 1.0 1.0 (0.1) 0.1 0.1 1.0 — — — 1.0 1.0 SHDN & ThreeState No Yes Yes Yes Yes No No No No No No Yes Yes No No No Yes Yes Yes No No Yes Yes Yes Yes Yes Rx Active in SHDN — — ✔ ✔ — — — — — — — — — — — — — — ✔ — — ✔ ✔ ✔ ✔ ✔ Data Rate (kbps) 120 200 120 120 120 120 120 (64) 200 120 200 120 120 120 120 120 120 120 120 200 200 120 120 120 120 120 120 Features Ultra-low-power, industry-standard pinout Low-power shutdown MAX241 and receivers active in shutdown Available in SO 5 drivers with shutdown Standard +5/+12V or battery supplies; same functions as MAX232 Industry standard Higher slew rate, small caps No external caps No external caps, high slew rate Replaces 1488 No external caps Shutdown, three state Complements IBM PC serial port Replaces 1488 and 1489 Standard +5/+12V or battery supplies; single-package solution for IBM PC serial port DIP or flatpack package Complete IBM PC serial port Separate shutdown and enable Open-line detection simplifies cabling High slew rate High slew rate, int. caps, two shutdown modes High slew rate, int. caps, three shutdown modes High slew rate, int. caps, nine operating modes High slew rate, selective half-chip enables Available in quad flatpack package

2SK4037资料

TOSHIBA Field Effect Transistor Silicon N Channel MOS Type2SK4037470 MHz Band Amplifier Applications(Note)The TOSHIBA products listed in this document are intended for high frequency Power Amplifier of telecommunications equipment. These TOSHIBA products are neither intended nor warranted for any other use. Do not use these TOSHIBA products listed in this document except for high frequency Power Amplifier of telecommunications equipment• Output power: P o = 36.5dBmW (typ) • Gain: G p = 11.5dB (typ)• Drain Efficiency: ηD = 60.0% (typ)Absolute Maximum Ratings (Ta = 25°C)Characteristics Symbol Rating UnitDrain-source voltage V DSS 12 V Gate-source voltage V GSS (Note 1)3VDrain current I D 3 A Power dissipation P D (Note 2)20WChannel temperature T ch 150 °C Storage temperature rangeT stg−45~150 °CNote:Using continuously under heavy loads (e.g. the application of high temperature/current/voltage and the significant change in temperature, etc.) may cause this product to decrease in thereliability significantly even if the operating conditions (i.e. operating temperature/current/voltage, etc.) are within the absolute maximum ratings.Please design the appropriate reliability upon reviewing the Toshiba Semiconductor Reliability Handbook (“Handling Precautions”/“Derating Concept and Methods”) and individual reliability data (i.e. reliability test report and estimated failure rate, etc).Note 1: Operating Ranges: 0~3VNote 2: Tc = 25°C (When mounted on a 0.8 mm glass epoxy PCB)MarkingCaution: This device is sensitive to electrostatic discharge.Please make enough tool and equipment earthed when you handle.Unit: mmJEDEC―JEITA ― TOSHIBA 2-5N1A Weight: 0.08 g (typ.)Electrical Characteristics (Ta = 25°C)Characteristics Symbol Test Condition Min Typ. Max UnitOutput power P O 35.5 36.5 ⎯ dBmW Drain efficiency ηD 55.0 60.0 ⎯ % Power gain G pV DS = 6.0 V, Iidle = 250 mA(V GS = adjust)f = 470 MHz, P i = 25dBmWZ G = Z L = 50 Ω 10.5 11.5 ⎯ dBThreshold voltage V th V DS = 6.0 V, I D = 0.5 mA ⎯ 1.0 1.5 V Drain cut-off current I DSS V DS = 12 V, V GS = 0 V ⎯ ⎯ 10 μA Gate-source leakage currentI GSSV GS = 3V, V DS = 0 V⎯⎯ 5 μALoad mismatch (Note 3)⎯V DS = 6.0 V, f = 470 MHz, P i = 25dBmW,P o = 36.5dBmW (VGS = adjust) VSWR LOAD 10:1 all phaseNo degradation ⎯Note 3: These characteristic values are measured using measurement tools specified by Toshiba.Test CircuitZ G GS DS50 ΩL1: φ0.6 mm enamel wire, 5.8ID, 8T L2: φ0.6 mm enamel wire, 5.8ID, 8TLine: 2mmNote 4: These are only typical curves and devices are not necessarily guaranteed at these curves.RESTRICTIONS ON PRODUCT USE20070701-EN GENERAL •The information contained herein is subject to change without notice.•TOSHIBA is continually working to improve the quality and reliability of its products. Nevertheless, semiconductor devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical stress. It is the responsibility of the buyer, when utilizing TOSHIBA products, to comply with the standards of safety in making a safe design for the entire system, and to avoid situations in which a malfunction or failure of such TOSHIBA products could cause loss of human life, bodily injury or damage to property.In developing your designs, please ensure that TOSHIBA products are used within specified operating ranges as set forth in the most recent TOSHIBA products specifications. Also, please keep in mind the precautions and conditions set forth in the “Handling Guide for Semiconductor Devices,” or “TOSHIBA Semiconductor Reliability Handbook” etc.• The TOSHIBA products listed in this document are intended for usage in general electronics applications (computer, personal equipment, office equipment, measuring equipment, industrial robotics, domestic appliances, etc.).These TOSHIBA products are neither intended nor warranted for usage in equipment that requires extraordinarily high quality and/or reliability or a malfunction or failure of which may cause loss of human life or bodily injury (“Unintended Usage”). Unintended Usage include atomic energy control instruments, airplane or spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments, medical instruments, all types of safety devices, etc.. Unintended Usage of TOSHIBA products listed in his document shall be made at the customer’s own risk.•The products described in this document shall not be used or embedded to any downstream products of which manufacture, use and/or sale are prohibited under any applicable laws and regulations.• The information contained herein is presented only as a guide for the applications of our products. No responsibility is assumed by TOSHIBA for any infringements of patents or other rights of the third parties which may result from its use. No license is granted by implication or otherwise under any patents or other rights of TOSHIBA or the third parties.• Please contact your sales representative for product-by-product details in this document regarding RoHS compatibility. Please use these products in this document in compliance with all applicable laws and regulations that regulate the inclusion or use of controlled substances. Toshiba assumes no liability for damage or losses occurring as a result of noncompliance with applicable laws and regulations.。

WK-4237说明书

4.4 實際測量元件................................................................................................................ 4–9 4.4.1 實例 ...................................................................................................................... 4–10 4.4.2 測量模式的參數MEASUREMENT MODE Parameters..................................... 4–11
5. 進階操作 ............................................................................................................................. 5–1
5.1 2, 3, 4 線測量模式接線法.............................................................................................. 5–1 5.2 測量極小電容................................................................................................................ 5–1 5.3 測量極小電感................................................................................................................ 5–1 5.4 測量鐵芯及鐵粉芯電感................................................................................................ 5–2 5.5 多重步驟模式................................................................................................................ 5–3

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General DescriptionThe MAX4236/MAX4237 are high-precision op amps that feature an exceptionally low offset voltage and off-set voltage temperature coefficient without using any chopper techniques. The MAX4236 and MAX4237 have a typical large-signal, open-loop voltage gain of 120dB.These devices have an ultra-low input-bias current of 1pA. The MAX4236 is unity-gain stable with a gain-bandwidth product of 1.7MHz, while the MAX4237 is stable for closed-loop gains greater than 5V/V with a gain-bandwidth product of 7.5MHz. Both devices have a shutdown function in which the quiescent current is reduced to less than 0.1µA, and the amplifier output is forced into a high-impedance state.The input common-mode range of the MAX4236/MAX4237 extends below the negative supply range, and the output swings Rail-to-Rail ®. These features make the amplifiers ideal for applications with +3V or +5V single power supplies. The MAX4236/MAX4237 are specified for the extended temperature range (-40°C to +85°C) and are available in tiny SOT23, µMAX, and SO packages. For greater accuracy, the A grade µMAX and SO packages are tested to guarantee 20µV (max) offset voltage at +25°C and less then 2µV/°C drift.ApplicationsStrain Gauges Piezoelectric Sensors Thermocouple Amplifiers Electrochemical Sensors Battery-Powered Instrumentation Instrumentation AmplifiersFeatureso Ultra-Low Offset Voltage20µV (max) at +25°C (Grade A)50µV (max) at +25°C (Grade B, 6-Pin SOT23)o Ultra-Low Offset Voltage Drift2µV/°C (max) (Grade A)4.5µV/°C (max) (Grade B, 6-Pin SOT23)5.5µV/°C (max) (6-Pin SOT23)o Ultra-Low 1pA Input Bias Currento High Open-Loop Voltage Gain: 110dB (min)(R L = 100k Ω)o Compatible with +3V and +5V Single-Supply Power Systems o Ground Sensing: Input Common-Mode Range Includes Negative Rail o Rail-to-Rail Output Swing into a 1k ΩLoad o 350µA Quiescent Current o Gain-Bandwidth Product1.7MHz (MAX4236, A V = 1V/V)7.5MHz (MAX4237, A V = 5V/V)o 200pF Capacitive Load Handling Capability o Shutdown Mode: 0.1µA Quiescent Current, Places Output in a High-Impedance State o Available in Space-Saving SOT23 and µMAX PackagesMAX4236/MAX4237SOT23, Very High Precision, 3V/5VRail-to-Rail Op Amps________________________________________________________________Maxim Integrated Products 1Pin ConfigurationsOrdering Information19-2110; Rev 0; 8/01For pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at .Rail-to-Rail is a registered trademark of Nippon Motorola, Inc.M A X 4236/M A X 4237SOT23, Very High Precision, 3V/5V Rail-To-Rail Op Amps 2_______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGSELECTRICAL CHARACTERISTICS (SO-8 and µMAX-8)(V= +2.4V to +5.5V, V = 0, V = 0, V = V /2, R = 100k Ωto V /2, T = T to T , unless otherwise noted. Typical Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.Supply Voltage (V CC - V EE )......................................-0.3V to +6V Analog Input Voltage (IN+ or IN-)....(V EE - 0.3V) to (V CC + 0.3V)Logic Input Voltage (SHDN )............(V EE - 0.3V) to (V CC + 0.3V) Current into Any Pin............................................................20mA Output Short-Circuit Duration....Continuous to Either V CC or V EE Continuous Power Dissipation (T A = +70°C)6-Pin SOT23-6 (derate 8.7mW/°C above +70°C).........696mW 8-Pin µMAX (derate 4.5mW/°C above +70°C)..............362mW 8-Pin SO (derate 5.9mW/°C above +70°C)...................471mWOperating Temperature Range ...........................-40°C to +85°C Junction Temperature......................................................+150°C Storage Temperature Range.............................-65°C to +150°C Lead Temperature (soldering, 10s).................................+300°CMAX4236/MAX4237SOT23, Very High Precision, 3V/5VRail-To-Rail Op Amps_______________________________________________________________________________________3ELECTRICAL CHARACTERISTICS (SO-8 and µMAX-8) (continued)(V CC = +2.4V to +5.5V, V EE = 0, V CM = 0, V OUT = V CC /2, R L = 100k Ωto V CC /2, T A = T MIN to T MAX , unless otherwise noted. Typical values are at V CC = +5V and T A = +25°C.) (Note 1)M A X 4236/M A X 4237SOT23, Very High Precision, 3V/5V Rail-To-Rail Op AmpsELECTRICAL CHARACTERISTICS (SO-8 and µMAX-8) (continued)(V CC = +2.4V to +5.5V, V EE = 0, V CM = 0, V OUT = V CC /2, R L = 100k Ωto V CC /2, T A = T MIN to T MAX , unless otherwise noted. Typical values are at V CC = +5V and T A = +25°C.) (Note 1)ELECTRICAL CHARACTERISTICS (SOT23-6)(V CC = +2.4V to +5.5V, V EE = 0, V CM = 0, V OUT = V CC /2, R L = 100k Ωto V CC /2, T A = T MIN to T MAX , unless otherwise noted. Typical values are at V CC = +5V and T A = +25°C.) (Note 1)MAX4236/MAX4237SOT23, Very High Precision, 3V/5VRail-To-Rail Op AmpsELECTRICAL CHARACTERISTICS (SOT23-6) (continued)(V CC = +2.4V to +5.5V, V EE = 0, V CM = 0, V OUT = V CC /2, R L = 100k Ωto V CC /2, T A = T MIN to T MAX , unless otherwise noted. Typical values are at V CC = +5V and T A = +25°C.) (Note 1)M A X 4236/M A X 4237SOT23, Very High Precision, 3V/5V Rail-To-Rail Op Amps 6_______________________________________________________________________________________42108612141618-10-6-4-8-2246810V OS DISTRIBUTIONV OS (µV)P E R C E N T O F U N I T S (%)515102025TCV OS DISTRIBUTIONTCV OS (µV/°C)P E R C E N T O F U N I T S (%)-2.0-1.5-1.0-0.50.51.0 1.52.0OFFSET VOLTAGE vs. TEMPERATUREM A X 4236 t o c 02-80-60-20-40406020080O F F S E T V O L T A G E (µV )-5025-255075100125TEMPERATURE (°C)Typical Operating Characteristics(V CC = +5V, V EE = 0, V CM = V CC /2, R L = 100k Ωto V CC /2, T A = +25°C, unless otherwise noted.)ELECTRICAL CHARACTERISTICS (SOT23-6) (continued)(V= +2.4V to +5.5V, V = 0, V = 0, V = V /2, R = 100k Ωto V /2, T = T to T , unless otherwise noted. Typical unless otherwise specified.Note 2:Guaranteed by design, not production tested.Note 3:Maxim specification limits for the temperature coefficient of the offset voltage (TCV OS ) are 100% tested for the A-grade, 8-pin SO and µMAX packages.MAX4236/MAX4237SOT23, Very High Precision, 3V/5VRail-To-Rail Op Amps_______________________________________________________________________________________704020806012010014003.0COMMON-MODE REJECTION RATIO vs. COMMON-MODE INPUT VOLTAGECOMMON-MODE INPUT VOLTAGE (V)C O M M O N -M O D E R E J E C T I O N R A T I O (d B )2.02.51.51.00.5COMMON-MODE REJECTION RATIOvs. FREQUENCY (V CC = 5V)M A X 4236 t o c 06FREQUENCY (kHz)C O M M O N -M ODE R E J E C T I O N R A T I O (d B )12004060801000.011010010000.1110,00020COMMON-MODE REJECTION RATIOvs. FREQUENCY (V CC = 3V)M A X 4236 t o c 07FREQUENCY (kHz)C O M M O N -M ODE R E J E C T I O N R A T I O (d B )14004060801000.011010010000.1110,000201201200.1110100100010,0001008040200POWER-SUPPLY REJECTION RATIOvs. FREQUENCY (V CC = 5V)M A X 4236 t o c 08FREQUENCY (kHz)P S S R (d B )600.0011010000.10.01110010,000100,000MAX4237OPEN-LOOP GAIN/PHASEvs. FREQUENCY FREQUENCY (kHz)G A I N (d B )-20206014012010080400P H A S E (D E G R E E S )Typical Operating Characteristics (continued)(V CC = +5V, V EE = 0, V CM = V CC /2, R L = 100k Ωto V CC /2, T A = +25°C, unless otherwise noted.)0.0011010000.10.01110010,000MAX4236OPEN-LOOP GAIN/PHASEFREQUENCY (kHz)G A I N (d B )-20206014012010080400P H A S E (D E G R E E S )25201510500.011100.1100INPUT VOLTAGE NOISE vs. FREQUENCYM A X 4236 t o c 11FREQUENCY (kHz)I N P U T VO L T A G E N O I S E (n V √H z )10.00011010010k100kTOTAL HARMONIC DISTORTION 0.0010.010.1FREQUENCY (Hz)T H D + N O I S E (%)1k 040208060120100140021345COMMON-MODE REJECTION RATIO vs. COMMON-MODE INPUT VOLTAGEM A X 4236 t o c 05COMMON-MODE INPUT VOLTAGE (V)C O M M O N -M ODE R E J E C T I O N R A T I O (d B )V CC = 5VM A X 4236/M A X 4237SOT23, Very High Precision, 3V/5V Rail-To-Rail Op Amps 8_______________________________________________________________________________________300330320310350340390380370360400-50-25255075100125SUPPLY CURRENT vs. TEMPERATURETEMPERATURE (°C)S U P P L Y C U R R E N T (µA )Typical Operating Characteristics (continued)(V CC = +5V, V EE = 0, V CM = V CC /2, R L = 100k Ωto V CC /2, T A = +25°C, unless otherwise noted.)3153253203353303403452.53.54.03.04.55.05.5SUPPLY CURRENT vs. SUPPLY VOLTAGESUPPLY VOLTAGE (V)S U P P L Y C U R R E N T (µA )6080100120LARGE-SIGNAL GAIN vs. TEMPERATURETEMPERATURE (°C)G A I N (d B )140-502550-257510012501510525204540353050-50-25255075100125MINIMUM OUTPUT VOLTAGEvs. TEMPERATURETEMPERATURE (°C)M I N I M U M O U T P U T V O L T A G E (m V )60402010080180160140120200-50-25255075100125MAXIMUM OUTPUT VOLTAGEvs. TEMPERATURETEMPERATURE (°C)M A X I M U M O U T P U T V O L T A G E (m V )604020801001201401601802003.03.54.04.55.0OUTPUT VOLTAGE vs. SUPPLY VOLTAGESUPPLY VOLTAGE (V)O U T P U T V O L T A G E (m V )00.51.01.52.02.53.03.54.03.03.54.04.55.0OUTPUT VOLTAGE vs. SUPPLY VOLTAGESUPPLY VOLTAGE (V)O U T P U T V O L T A G E (m V )642810122.01.50.5 1.0 2.53.0 3.54.0 4.55.0OUTPUT SOURCE CURRENT vs. OUTPUT VOLTAGEOUTPUT VOLTAGE (V)O U T P U T S O U R C E C U R R E N T (mA )321456789101.00.51.52.02.53.0OUTPUT SOURCE CURRENT vs. OUTPUT VOLTAGEOUTPUT VOLTAGE (V)O U T P U T S O U R C E C U R R E N T (m A )MAX4236/MAX4237SOT23, Very High Precision, 3V/5VRail-To-Rail Op Amps_______________________________________________________________________________________90201030607050408001.0 1.52.0 2.50.53.0 3.54.0 4.55.0OUTPUT SINK CURRENT vs. OUTPUT VOLTAGEOUTPUT VOLTAGE (V)O U T P U T S I N K C U R R E N T (m A )2010403050600 1.0 1.50.5 2.0 2.5 3.0OUTPUT SINK CURRENT vs. OUTPUT VOLTAGEOUTPUT VOLTAGE (V)O U T P U T S I N K C U R R E N T (m A )05101520SHORT-CIRCUIT CURRENT vs. TEMPERATURETEMPERATURE (°C)S H O R T -C I R C U I T C U R R E N T (m A )-502550-2575100125Typical Operating Characteristics (continued)(V CC = +5V, V EE = 0, V CM = V CC /2, R L = 100k Ωto V CC /2, T A = +25°C, unless otherwise noted.)SHORT-CIRCUIT CURRENTvs. TEMPERATURE0515103035252040S H O R T -C I R C U I T C U R R E N T (m A )-5025-255075100125TEMPERATURE (°C)-2.5-1.0-1.5-2.0-0.500.51.01.52.02.5-100-50050100DC I/O TRANSFER CURVE(R LOAD = 100k Ω)DIFFERENTIAL INPUT VOLTAGE (µV)O U T P U T V O L T A G E (V )-2.5-1.0-1.5-2.0-0.500.51.01.52.02.5-100-50050100DC I/O TRANSFER CURVE(R LOAD = 1k Ω)DIFFERENTIAL INPUT VOLTAGE (µV)O U T P U T V O L T A G E (V )1µs/divMAX4236NONINVERTING SMALL-SIGNAL RESPONSEINPUT 10mV/divOUTPUT 10mV/divMAX4236 toc28V CC = ±2.5VR L = 1k Ω, C L = 15pF A V = 1V/V1µs/divMAX4237NONINVERTING SMALL-SIGNAL RESPONSEINPUT 10mV/divOUTPUT 50mV/divMAX4236 toc29V CC = ±2.5VR L = 1k Ω, C L = 15pF A V = 5V/VM A X 4236/M A X 4237SOT23, Very High Precision, 3V/5V Rail-To-Rail Op Amps 10______________________________________________________________________________________2µs/divMAX4237NONINVERTING LARGE-SIGNAL RESPONSEINPUT 200mV/divOUTPUT 1V/divMAX4236 toc30V CC = ±2.5VR L = 1k Ω, C L = 15pF A V = 5V/VTypical Operating Characteristics (continued)(V CC = +5V, V EE = 0, V CM = V CC /2, R L = 100k Ωto V CC /2, T A = +25°C, unless otherwise noted.)MAX4236 toc31INPUT 1V/divMAX4236 toc32MAX4236 toc33MAX4236/MAX4237SOT23, Very High Precision, 3V/5VRail-To-Rail Op Amps______________________________________________________________________________________11Detailed DescriptionThe MAX4236/MAX4237 are high-precision op amps with a CMOS input stage and an excellent set of DC and AC features. The combination of tight maximum voltage offset, low offset tempco and very low input current make them ideal for use in high-precision DC circuits. They feature low-voltage operation, low-power consumption, high-current drive with rail-to-rail output swing and high-gain bandwidth product.High AccuracyThe MAX4236/MAX4237 maximum input offset voltage is 20µV (5µV, typ) for grade A version and 50µV for grade B version at +25°C. The maximum temperature coefficient of the offset voltage for grade A and B are guaranteed to be 2µV/°C and 4.5µV/°C respectively.The parts have an input bias current of 1pA. Noise characteristics are 14nV/√Hz , and a low frequency noise (0.1Hz to 10Hz) of 0.2µVp-p. The CMRR is 102dB, and the PSRR is 120dB. The combination is what is necessary for the design of circuits to process signals while keeping high signal-to-noise ratios, as in stages preceding high-resolution converters, or when they are produced by sensors or transducers generat-ing very small outputs.Rail-to-Rail Outputs, Ground-Sensing InputThe input common-mode range extends from (V EE -0.15V) to (V CC - 1.2V) with excellent common-mode rejection. Beyond this range, the amplifier output is a nonlinear function of the input, but does not undergo phase reversal or latch-up (see Typical Operating Characteristics ).The output swings to within 150mV of the power-supply rails with a 1k Ωload. The input ground sensing and the rail-to-rail output substantially increase the dynamic range.Power-Up and Shutdown ModeThe MAX4236/MAX4237 have a shutdown option.When the shutdown pin (SHDN ) is pulled low, the sup-ply current drops to 0.1µA, and the amplifiers are dis-abled with the output in a high-impedance state. Pulling SHDN high enables the amplifiers. The turn-on time for the amplifiers to come out of shutdown is 4µs.Applications InformationAs described above, the characteristics of the MAX4236/MAX4237 are excellent for high-precision/accuracy circuitry, and the high impedance, low-cur-rent, low-offset, and noise specifications are very attractive for piezoelectric transducers applications. In these applications, the sensors generate an amount of electric charge proportional to the changes in the mechanical stress applied to them. These charges are transformed into a voltage proportional to the applied force by injecting them into a capacitance and then amplifying the resulting voltage. The voltage is an inverse function of the capacitance into which the charges generated by the transducer/ sensor are injected. This capacitance and the resistance that dis-charges it, define the low-frequency response of the circuit. It is desirable, once the preferred low-frequency response is known, to maintain the capacitance as low as possible, because the amount of necessary upstream amplification (and the signal-to-noise ratio deterioration) is directly proportional to the capacitance value. The MAX4236/MAX4237 high-impedance, low-Pin DescriptionM A X 4236/M A X 4237SOT23, Very High Precision, 3V/5V Rail-To-Rail Op Amps 12______________________________________________________________________________________current, low-noise inputs allow a minimum of capaci-tance to be used.Piezoresistive transducers applications require many of the same qualities. For those applications the MAX4236/MAX4237 high CMRR, PSRR, and offset sta-bility are also a good match.A typical application for a piezoresistive transducer instrumentation amplifier design using the MAX4236/MAX4237 is shown in the Typical Application Circuit .In general, the MAX4236/MAX4237 are good compo-nents for any application in which an amplifier with an almost zero input current is required, including high-precision, long time-constant integrators and electro-chemical sensors.Power SuppliesThe MAX4236/MAX4237 can operate from a single +2.4V to +5.5V power supply, or from ±1.2V to ±2.75V power supplies. The power supply pin(s) must be bypassed to ground with a 0.1µF capacitor as close to the pin as possible.Layout and Physical DesignA good layout improves performance by decreasing the amount of parasitic and stray capacitance, induc-tance and resistance at the amplifier ’s inputs, outputs,and power-supply connections. Since parasitics might be unavoidable, minimize trace lengths, resistor leads,and place external components as close to the pins as possible.In high impedance, low input current applications, input lines guarding and shielding, special grounding, and other physical design and layout techniques, are mandatory if good results are expected.The negative effects of crosstalk, EMI and other forms of interference and noise (thermal, acoustic, etc.) must be accounted for and prevented beforehand for good performance in the type of sensitive circuitry in which the MAX4236/MAX4237 are likely to be used.Selector GuideTypical Application CircuitChip InformationTRANSISTOR COUNTS: 224PROCESS: BiCMOSMAX4236/MAX4237SOT23, Very High Precision, 3V/5VRail-To-Rail Op Amps______________________________________________________________________________________13Package InformationM A X 4236/M A X 4237SOT23, Very High Precision, 3V/5V Rail-To-Rail Op Amps Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.14____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600©2001 Maxim Integrated ProductsPrinted USAis a registered trademark of Maxim Integrated Products.Package Information (continued)。