MAX5177BEEE+T中文资料
MAX471MAX472的中文资料大全
M A X471M A X472的中文资料大全(总4页)-本页仅作为预览文档封面，使用时请删除本页-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/MA X472、 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-3RG1增益电阻端。
通过增益设置电阻连接到电流检测电阻的电池端44GND地或电池负端55SIGN集电极开路逻辑输出端。
MAX1168BEEG中文资料
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at .
Features
MAX1167/MAX1168
Applications
Motor Control Industrial Process Control Industrial I/O Modules Data-Acquisition Systems Thermocouple Measurements Accelerometer Measurements
*Future product—contact factory for availability. SPI/QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp. AutoShutdown is a trademark of Maxim Integrated Products, Inc. Ordering Information continued at end of data sheet. Pin Configurations appear at end of data sheet.
PART MAX1167ACEE MAX1167BCEE MAX1167CCEE MAX1167AEEE* MAX1167BEEE* MAX1167CEEE*
MEMORY存储芯片MAX1771ESA+T中文规格书
ABSOLUTE MAXIMUM RATINGSSupply VoltageV+ to GND...............................................................-0.3V, 17V EXT, CS, REF, SHDN, FB to GND...................-0.3V, (V+ + 0.3V) GND to AGND.............................................................0.1V, -0.1V Continuous Power Dissipation (T A= +70°C)Plastic DIP (derate 9.09mW/°C above +70°C)............727mW SO (derate 5.88mW/°C above +70°C).........................471mW CERDIP (derate 8.00mW/°C above +70°C).................640mW Operating Temperature RangesMAX1771C_A.....................................................0°C to +70°C MAX1771E_A..................................................-40°C to +85°C MAX1771MJA................................................-55°C to +125°C Junction TemperaturesMAX1771C_A/E_A.......................................................+150°C MAX1771MJA..............................................................+175°C Storage Temperature Range.............................-65°C to +160°C Lead Temperature (soldering, 10sec).............................+300°CStresses 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.ELECTRICAL CHARACTERISTICS(V+ = 5V, I LOAD= 0mA, T A= T MIN to T MAX, unless otherwise noted. Typical values are at T A= +25°C.)2 Integrated 找MEMORY、二三极管上美光存储12V or Adjustable, High-Efficiency, Low I Q , Step-Up DC-DC ControllerELECTRICAL CHARACTERISTICS (continued)(V+ = 5V, I LOAD = 0mA, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.)Note 1:Output voltage guaranteed using preset voltages. See Figures 4a–4d for output current capability versus input voltage.Note 2:Output voltage line and load regulation depend on external circuit components.Typical Operating Characteristics(T A = +25°C, unless otherwise noted.)606575708085909510011010010,0001000EFFICIENCY vs. LOAD CURRENT (BOOTSTRAPED MODE)LOAD CURRENT (mA)E F F I C I E N C Y (%)606575708085909510011010010,0001000EFFICIENCY vs. LOAD CURRENT (NON-BOOTSTRAPED MODE)LOAD CURRENT (mA)E F F I C I E N C Y (%)02.00LOAD CURRENT vs.MINIMUM START-UP INPUT VOLTAGE MINIMUM START-UP INPUT VOLTAGE (V)L O A D C U R R E N T (m A )100200300400500600700 2.25 2.50 2.75 3.00 3.25 3.50MAX1771Integrated 3。
MAX4173TEUT-T中文资料
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
MAX4590EAE-T中文资料
General DescriptionThe MAX4580/MAX4590/MAX4600 dual analog switches feature low on-resistance of 1.25Ωmax. On-resistance is matched between switches to 0.25Ωmax and is flat (0.3Ωmax) over the specified signal range. Each switch can handle Rail-to-Rail ®analog signals. The off-leakage current is only 2.5nA max at +85°C. These analog switches are ideal in low-distortion applications and are the preferred solution over mechanical relays in automat-ic test equipment or applications where current switching is required. They have low power requirements, require less board space, and are more reliable than mechanical relays.The MAX4580 has two NC (normally closed) switches,the MAX4590 has two NO (normally open) switches,and the MAX4600 has one NC (normally closed) and one NO (normally open) switch.These switches operate from a +4.5V to +36V single supply or from ±4.5V to ±20V dual supplies. All digital inputs have +0.8V and +2.4V logic thresholds, ensuring TTL/CMOS-logic compatibility when using a +12V sin-gle supply or ±15V dual supplies.ApplicationsReed Relay Replacement Test EquipmentCommunication Systems PBX, PABX SystemsFeatureso Low On-Resistance (1.25Ωmax)o Guaranteed R ON Match Between Channels (0.25Ωmax)o Guaranteed R ON Flatness Over Specified Signal Range (0.3Ωmax)o Rail-to-Rail Signal Handlingo Guaranteed ESD Protection >2kV per Method 3015.7o Single-Supply Operation: +4.5V to +36V Dual-Supply Operation: ±4.5V to ±20V o TTL/CMOS-Compatible Control InputsMAX4580/MAX4590/MAX46001.25Ω, Dual SPST,CMOS Analog Switches________________________________________________________________Maxim Integrated Products119-1394; Rev 1; 6/03Ordering Information continued at end of data sheet.Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.Pin Configurations/Functional Diagrams/Truth TablesOrdering InformationFor pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at .M A X 4580/M A X 4590/M A X 46001.25Ω, Dual SPST,CMOS Analog Switches 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+ to GND..............................................................-0.3V to +44V V- to GND...............................................................+0.3V to -44V V+ to V-...................................................................-0.3V to +44V V L to GND....................................................-0.3V to (V+ + 0.3V)All Other Pins to GND (Note 1) ...........(V- - 0.3V) to (V+ + 0.3V)Continuous Current (COM_, NO_, NC_) .......................±200mA Peak Current (COM_, NO_, NC_)(pulsed at 1ms, 10% duty cycle) ..............................±300mAContinuous Power Dissipation (T A = +70°C)16 SSOP (derate 7.1mW/°C above +70°C).................571mW 16 Wide SO (derate 9.52mW/°C above +70°C) ..........762mW 16 Plastic DIP (derate 10.53mW/°C above +70°C).....842mW Operating Temperature RangesMAX4_ _0C_E ....................................................0°C to +70°C MAX4_ _0E_E ..................................................-40°C to +85°C Storage Temperature Range ...........................-65°C to +160°C Lead Temperature (soldering, 10sec) ............................+300°CELECTRICAL CHARACTERISTICS–Dual Supplies(V+ = +15V, V- = -15V, V L = +5V, V IN_H = +2.4V, V IN_L = +0.8V, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.)Note 1:Signals on NC_, NO_, COM_, or IN_ exceeding V+ or V- are clamped by internal diodes. Limit forward diode current tomaximum current rating.ELECTRICAL CHARACTERISTICS–Dual Supplies (continued)MAX4580/MAX4590/MAX46001.25Ω, Dual SPST,CMOS Analog Switches (V+ = +15V, V- = -15V, V L= +5V, V IN_H= +2.4V, V IN_L= +0.8V, T A = T MIN to T MAX, unless otherwise noted. Typical values are atT A= +25°C.)_______________________________________________________________________________________3M A X 4580/M A X 4590/M A X 46001.25Ω, Dual SPST,CMOS Analog Switches 4_______________________________________________________________________________________ELECTRICAL CHARACTERISTICS–Single Supply(V+ = +12V, V- = 0, V L = +5V, V INH = 2.4V, V INL = 0.8V, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T = +25°C.)MAX4580/MAX4590/MAX46001.25Ω, Dual SPST,CMOS Analog Switches_______________________________________________________________________________________5ELECTRICAL CHARACTERISTICS—Single Supply (continued)(V+ = +12V, V- = 0, V L = +5V, V IN_H = 2.4V, V IN_L = 0.8V, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.)Note 2:The algebraic convention, where the most negative value is a minimum and the most positive value a maximum, is used inthis data sheet.Note 3:Guaranteed by design.Note 4:∆R ON = R ON(MAX)- R ON(MIN).Note 5:Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over thespecified analog signal range.Note 6:Leakage parameters are 100% tested at maximum-rated hot temperature and guaranteed by correlation at +25°C.Note 7:Off-isolation = 20 log 10[V COM / (V NC or V NO )], V COM = output, V NC or V NO = input to off switch.Note 8:Between any two switches.Note 9:Leakage testing at single supply is guaranteed by testing with dual supplies.0.51.01.52.02.5-20-12-8-16-448121620ON-RESISTANCE vs. V COM(DUAL SUPPLIES)V COM (V)R O N (Ω)ON-RESISTANCE vs. V COMAND TEMPERATURE (DUAL SUPPLIES)V COM (V)R O N (Ω)129-12-9-63-360.50.60.70.80.91.01.11.20.4-1515ON-RESISTANCE vs. V COM(SINGLE SUPPLY)V COM (V)R O N (Ω)2220181614121086421234524Typical Operating Characteristics(Circuit of Figure 1, T A = +25°C, unless otherwise noted.)Typical Operating Characteristics (continued)(Circuit of Figure 1, T A = +25°C, unless otherwise noted.)M A X 4580/M A X 4590/M A X 46001.25Ω, Dual SPST,CMOS Analog Switches 6_______________________________________________________________________________________ON-RESISTANCE vs. V COMAND TEMPERATURE (SINGLE SUPPLY)V COM (V)R O N (Ω)11108923456710.250.500.751.001.251.501.752.002.2500120.0010.010.11100101000-4020-20406080100POWER-SUPPLY CURRENTvs. TEMPERATURETEMPERATURE (°C)I +, I - (n A )10,0000.0010.01110-4020-20406080100ON/OFF-LEAKAGE vs. TEMPERATURETEMPERATURE (°C)L E A K A G E (n A )-500-3000200400-400-100100300500-15-50-10515CHARGE INJECTIONvs. V COMV COM (V)Q (p C )10-2000-1000.011100.1100-80FREQUENCY (MHz)L O S S (d B )P H A S E (d e g r e e s )-60-40-20-90-70-50-30-10+180-720-540-360-1800-630-450-270-90+9050100150250300-4010-15356085TURN-ON/TURN-OFF TIME vs. TEMPERATURETEMPERATURE (°C)t O N , t O F F (n s )MAX4580/MAX4590/MAX46001.25Ω, Dual SPST,CMOS Analog Switches_______________________________________________________________________________________7801202001602402801012111314151617181920TURN-ON/TURN-OFF TIME vs. SUPPLY VOLTAGEV+, V- (V)t O N , t O F F (n s )Typical Operating Characteristics (continued)(Circuit of Figure 1, T A = +25°C, unless otherwise noted.)TURN-ON/TURN-OFF TIME vs. V COMV COM (V)t O N , t O F F (n s )8642-2-4-6-8120140160180200220100-1010Pin DescriptionM A X 4580/M A X 4590/M A X 46001.25Ω, Dual SPST,CMOS Analog Switches8__________________________________________________________________________________________________Applications InformationOvervoltage ProtectionProper power-supply sequencing is recommended for all CMOS devices. Do not exceed the absolute maxi-mum ratings, because stresses beyond the listed rat-ings can cause permanent damage to the devices.Always sequence V+ on first, then V-, followed by the logic inputs, NO, or COM. If power-supply sequencing is not possible, add two small signal diodes (D1, D2) in series with supply pins for overvoltage protection (Figure 1). Adding diodes reduces the analog signal range to one diode drop below V+ and one diode drop above V-, but does not affect the devices’ low switch resistance and low leakage characteristics. Device operation is unchanged, and the difference between V+and V- should not exceed 44V. These protection diodes are not recommended when using a single supply.Figure 1. Overvoltage Protection Using External Blocking DiodesFigure 2. Switching-Time Test CircuitMAX4580/MAX4590/MAX46001.25Ω, Dual SPST,CMOS Analog Switches_______________________________________________________________________________________9Figure 4. Off-Isolation Test Circuit Figure 5. Crosstalk Test CircuitM A X 4580/M A X 4590/M A X 46001.25Ω, Dual SPST,CMOS Analog Switches 10______________________________________________________________________________________Ordering Information (continued)___________________Chip InformationTRANSISTOR COUNT: 100Figure 6. Switch Off-Capacitance Test CircuitFigure 7. Switch On-Capacitance Test CircuitPackage InformationMAX4580/MAX4590/MAX46001.25Ω, Dual SPST,CMOS Analog Switches (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline informationgo to /packages.) Array______________________________________________________________________________________11M A X 4580/M A X 4590/M A X 46001.25Ω, Dual SPST,CMOS Analog Switches S O I C W .E P SPackage 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 .)Ma xim ca nnot a ssume responsibility for use of a ny circuitry other tha n circuitry entirely embodied in a Ma xim product. No circuit pa tent licenses a re implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.12____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600©2003 Maxim Integrated ProductsPrinted USAis a registered trademark of Maxim Integrated Products.。
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。
MAX31785中文资料
_________________________________________________________________Maxim Integrated Products __1本文是英文数据资料的译文，文中可能存在翻译上的不准确或错误。
如需进一步确认，请在您的设计中参考英文资料。
有关价格、供货及订购信息，请联络Maxim 亚洲销售中心：10800 852 1249 (北中国区)，10800 152 1249 (南中国区)，或访问Maxim 的中文网站： 。
6通道智能风扇控制器MAX3178519-5703; Rev 0; 12/10+表示无铅(Pb)/符合RoHS 标准的封装。
T = 卷带包装。
*EP = 裸焊盘。
概述MAX31785是一款闭环多通道风扇控制器。
自动闭环风扇控制架构将风扇控制在尽可能低的转速，从而节省系统功率。
低风扇转速的其它优势包括：有效降低可闻噪声和更长的风扇寿命、更少的系统维护。
根据用户可编程查找表(LUT)，器件根据11个温度传感器中的一个或多个传感器测量值，自动调节6个独立风扇的转速。
也可以由外部主机手动控制风扇转速，器件自动调整风扇转速。
器件具有风扇状况诊断功能，帮助用户预防将要发生的风扇故障。
器件还可监测多达6路远端电压。
应用网络交换机/路由器基站服务器智能电网系统工业控制定购信息特性S 6路独立的风扇控制通道 支持3线和4线风扇 自动闭环风扇转速控制 基于RPM 或PWM 控制 可选手动控制模式快速、慢速PWM 频率选项 风扇交替启动，缓解电源压力 双转速计(支持12个风扇) 风扇故障检测 风扇运转状态监测 非易失风扇运转时间表S 支持多达11个温度传感器6个外部温度二极管，带有串联电阻自动抵消功能 1个内部温度传感器 4个I 2C 数字温度传感器对所有温度传感器进行故障检测S 6路ADC 测量远端电压S PMBus™兼容命令接口S I 2C/SMBus™兼容串行总线，带有总线超时功能S 板载非易失故障记录和默认配置设置S 无需外部时钟S +3.3V 供电PMBus 是SMIF, Inc.的商标。
MAX5170AEEE中文资料
DIN 7 SCLK 8
QSOP
________________________________________________________________ Maxim Integrated Products
1
For free samples & the latest literature: , or phone 1-800-998-8800. For small orders, phone 1-800-835-8769.
元器件交易网
Low-Power, Serial, 14-Bit DACs with Voltage Output MAX5170/MAX5172
ABSOLUTE MAXIMUM RATINGS
VDD to AGND, DGND ............................................-0.3V to +6.0V AGND to DGND.....................................................-0.3V to +0.3V Digital Inputs to DGND..........................................-0.3V to +6.0V DOUT, UPO to DGND ................................-0.3V to (VDD + 0.3V) OUT, REF to AGND ...................................-0.3V to (VDD + 0.3V) OS to AGND ...............................(AGND - 4.0V) to (VDD + 0.3V) Maximum Current into Any Pin............................................50mA Continuous Power Dissipation (TA = +70°C) 16-Pin QSOP (derate 8mW/°C above +70°C)..............667mW Operating Temperature Range ...........................-40°C to +85°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10sec) .............................+300°C
岛谷黑金三代 Centre LN
岛谷黑金三代 Centre LN/LD / 旗舰7.1声卡2008年12月30日星期二 16:32黑金型号较多，量产三款产品最主要差别见下表Cinema LV Cinema LN CentreLN/LD主芯片： 1722GT 1722GT 1724HT模拟部分模拟输出声道 5.1 5.1 7.1输出分辨率/采样率 24bit/48KHz 24bit/96KHz24bit/192KHz输入分辨率/采样率 24bit/48KHz 24bit/96KHz 24bit/96KHzSPDIF数字输出(同轴/光纤)输出分辨率/采样率 24bit/48KHz 24bit/96KHz24bit/192KHz输入分辨率/采样率 24bit/48KHz 24bit/96KHz24bit/192KHz数字输出接口光纤+TGlink BNC同轴+光纤+TGlink BNC同轴+光纤+TGlink谷科技是国内声卡业最具号召力的公司之一，推出的声卡产品黑金二代在DIY群体中有着很高的知名度，至今点名率依然很高。
早前黑金三代已经推出，但是却一直没有正式公开出货，不过在小编的一再打探下，终于发现了这款“传说中的声卡”。
相当适合对PC音效有一定追求的进阶DIYer。
光看上半部还真就以为他是显卡。
我们先看看细节部分。
万般皆下品，先来看看Audio Controller，这款500元不到的声卡竟然采用了VIA ENVY24-GT！与我们在另一款经常被人吹捧的声卡上见到的Tremor相比，这款芯片无论模拟还是数字都达到了24bit/96kHz的采样规格！虽然这不是声卡音质的决定性因素，但是优秀的规格无疑将在音质对比中获得更高的胜算。
近期关注声卡评测的朋友对这款WM8776S一定有印象WM8776是一种高性能的立体声音频编码解码器（Codec），采用48引脚TQFP封装，带有五个声道的输入选择器。
WM8776 可完美应用于家庭高保真音响、DVD－RW和其它视听设备的环绕音处理应用。
MAX5489ETE-T中文资料
MAX5489ETE-T中⽂资料General DescriptionThe MAX5487/MAX5488/MAX5489 dual, linear-taper,digital potentiometers function as mechanical poten-tiometers with a simple 3-wire SPI?-compatible digital interface that programs the wipers to any one of 256tap positions. These digital potentiometers feature a nonvolatile memory (EEPROM) to return the wipers to their previously stored positions upon power-up.The MAX5487 has an end-to-end resistance of 10k Ω,while the MAX5488 and MAX5489 have resistances of 50k Ωand 100k Ω, respectively. These devices have a low 35ppm/°C end-to-end temperature coefficient, and operate from a single+2.7V to +5.25V supply.The MAX5487/MAX5488/MAX5489 are available in 16-pin 3mm x 3mm x 0.8mm thin QFN or 14-pin TSSOP packages. Each device is guaranteed over the extend-ed -40°C to +85°C temperature range.ApplicationsLCD Screen Adjustment Audio Volume ControlMechanical Potentiometer Replacement Low-Drift Programmable FiltersLow-Drift Programmable-Gain AmplifiersFeaturesWiper Position Stored in Nonvolatile Memory (EEPROM) and Recalled Upon Power-Up or Recalled by an Interface Command ?3mm x 3mm x 0.8mm, 16-Pin Thin QFN or 14-Pin TSSOP Packages ?±1 LSB INL, ±0.5 LSB DNL (Voltage-Divider Mode)?256 Tap Positions35ppm/°C End-to-End Resistance Temperature Coefficient 5ppm/°C Ratiometric Temperature Coefficient 10k Ω, 50k Ω, and 100k ΩEnd-to-End Resistance Values ?SPI-Compatible Serial Interface ?Reliability200,000 Wiper Store Cycles 50-Year Wiper Data Retention+2.7V to +5.25V Single-Supply OperationMAX5487/MAX5488/MAX5489Linear-Taper Digital Potentiometers________________________________________________________________Maxim Integrated Products119-3478; Rev 3; 1/07For pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at /doc/010aa430376baf1ffc4fadca.html .SPI is a trademark of Motorola, Inc.Ordering Information/Selector Guide**Future product—contact factory for availabilty .Functional DiagramM A X 5487/M A X 5488/M A X 5489Dual, 256-Tap, Nonvolatile, SPI-Interface,Linear-Taper Digital Potentiometers2_______________________________________________________________________________________ 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 DD to GND...........................................................-0.3V to +6.0V All Other Pinsto GND......................-0.3V to the lower of (V DD + 0.3V) and +6.0V Maximum Continuous Current into H_, W_, and L_ MAX5487......................................................................±5.0mA MAX5488......................................................................±1.3mA MAX5489......................................................................±0.6mAContinuous Power Dissipation (T A = +70°C)16-Pin Thin QFN (derate 17.5mW/°C above +70°C).....1398mW 14-Pin TSSOP (derate 9.1mW/°C above+70°C).............727mW Operating Temperature Range ...........................-40°C to +85°C Junction Temperature......................................................+150°C Storage Temperature Range.............................-60°C to +150°C Lead Temperature (soldering, 10s).................................+300°CDC ELECTRICAL CHARACTERISTICSMAX5487/MAX5488/MAX5489Dual, 256-Tap, Nonvolatile, SPI-Interface,Linear-Taper Digital Potentiometers_______________________________________________________________________________________3DC ELECTRICAL CHARACTERISTICS (continued)(V DD = +2.7V to +5.25V, V H = V DD , V L = GND, T A = -40°C to +85°C, unless otherwise noted. Typical values are at V DD = +5.0V, T A = +25°C, unless otherwise noted.) (Note 1)M A X 5487/M A X 5488/M A X 5489Dual, 256-Tap, Nonvolatile, SPI-Interface,Linear-Taper Digital Potentiometers4_______________________________________________________________________________________Note 2:DNL and INL are measured with the potentiometer configured as a voltage-divider with H_ = V DD and L_ = 0. The wiper terminalis unloaded and measured with an ideal voltmeter.Note 3:DNL and INL are measured with the potentiometer configured as a variable resistor. H_ is unconnected and L_ = 0. For V DD =+5V, the wiper terminal is driven with a source current of 400µA for the 10k Ωconfiguration, 80µA for the 50kΩconfiguration,and 40µA for the 100k Ωconfiguration. For VNote 4:The wiper resistance is the worst value measured by injecting the currents given in Note 3 into W_ with L_ = GND. R W =(V W - V H ) / I W .Note 5:The device draws higher supply current when the digital inputs are driven with voltages between (V DD - 0.5V) and (GND +0.5V). See Supply Current vs. Digital Input Voltage in the Typical Operating Characteristics section.Note 6:Wiper at midscale with a 10pF load.Note 7:Wiper-settling time is the worst-case 0-to-50% rise time, measured between tap 0 and tap 127. H_ = V DD , L_ = GND, andthe wiper terminal is unloaded and measured with a 10pF oscilloscope probe (see Tap-to-Tap Switching Transient in the Typical Operating Characteristics section).Note 8:Digital timing is guaranteed by design and characterization, and is not production tested.DC ELECTRICAL CHARACTERISTICS (continued)(V DD = +2.7V to +5.25V, V H = V DD , V L = GND, T A = -40°C to +85°C, unless otherwise noted. Typical values are at V DD = +5.0V, T A = +25°C, unless otherwise noted.) (Note 1)Figure 1. Voltage-Divider/Variable-Resistor ConfigurationsMAX5487/MAX5488/MAX5489Dual, 256-Tap, Nonvolatile, SPI-Interface,Linear-Taper Digital Potentiometers_______________________________________________________________________________________50.10-40-20204060800.50.40.30.20.6TEMPERATURE (°C)S U P P L Y C U R R E N T (µA )SUPPLY CURRENT vs. TEMPERATURESUPPLY CURRENTvs. DIGITAL INPUT VOLTAGEDIGITAL INPUT VOLTAGE (V)S U P P L Y C U R R E N T (µA )21110100100010,000005050150100200250649632128160192224256WIPER RESISTANCE vs. TAP POSITION M A X5487-89 t o c 03TAP POSITIONW I P E R R E S I S T A N C E (Ω)1µs/div TAP-TO-TAP SWITCHING TRANSIENT(MAX5487)CS 2.0V/divWIPER 20mV/divTAP-TO-TAP SWITCHING TRANSIENT(MAX5488)1.0µs/divWIPER 20mV/divWIPER TRANSIENT AT POWER-ON2.0µs/divWIPER2.0V/divV H_ = V DDV DD 2.0V/divFREQUENCY (kHz)G A I N (d B )MIDSCALE FREQUENCY RESPONSE(MAX5487)0TAP-TO-TAP SWITCHING TRANSIENT(MAX5489)1.0µs/divWIPER 20mV/divCS 2.0V/divTypical Operating Characteristics(V DD = +5.0V, T A = +25°C, unless otherwise noted.)M A X 5487/M A X 5488/M A X 5489Dual, 256-Tap, Nonvolatile, SPI-Interface,Linear-Taper Digital Potentiometers6_______________________________________________________________________________________ VARIABLE-RESISTOR INL vs. TAP POSITION (MAX5488)M A x 5487-89 t o c 12TAP POSITIONI N L (L S B )224192326496128160-0.6-0.8-0.4-0.200.20.4-0.10-0.150-0.050.050.100.150.200649632128160192224256VOLTAGE-DIVIDER DNL vs. TAP POSITION (MAX5487) TAP POSITION D N L (L S B )VOLTAGE-DIVIDER DNL vs. TAP POSITION (MAX5488) M A x 5487-89 t o c 15TAP POSITION D N L (L S B )224192326496128160-0.15-0.10-0.0500.050.100.150.20-0.20256VOLTAGE-DIVIDER INL vs. TAP POSITION (MAX5488)M A x 5487-89 t o c 16TAP POSITIONI N L (L S B )224192326496128160-0.6-0.8-0.4-0.200.20.40.60.81.0-1.02560.60.20.40.200.60.40.81.21.01.40649632128160192224256VOLTAGE-DIVIDER INL vs. TAP POSITION (MAX5487)TAP POSITIONI N L (L S B)Typical Operating Characteristics (continued)(V DD = +5.0V, T A = +25°C, unless otherwise noted.)MIDSCALE FREQUENCY RESPONSE(MAX5488)FREQUENCY (kHz)G A I N (d B )100101-45-40-35-30-25-20-15-10-50-50MIDSCALE FREQUENCY RESPONSE(MAX5489)FREQUENCY (kHz)G A I N (d B )100101-45-40-35-30-25-20-15-10-50-500.11000VARIABLE-RESISTOR DNL vs. TAP POSITION (MAX5488)M A x 5487-89 t o c 11TAP POSITIOND N L (L S B )224192326496128160-0.15-0.10-0.0500.050.100.150.20-0.200256MAX5487/MAX5488/MAX5489Dual, 256-Tap, Nonvolatile, SPI-Interface,Linear-Taper Digital Potentiometers_______________________________________________________________________________________7 VARIABLE-RESISTOR DNL vs. TAP POSITION (MAX5489)M A x 5487-89 t o c 17TAP POSITION D N L (L S B )224192326496128160-0.15-0.10-0.0500.050.100.150.20-0.20256VOLTAGE-DIVIDER INL vs. TAP POSITION (MAX5489)M A x 5487-89 t o c 20TAP POSITIONI N L (L S B )22419232128160-0.6-0.8-0.4-0.200.20.40.60.81.0-1.0256VARIABLE-RESISTOR INL vs. TAP POSITION (MAX5489)M A x 5487-89 t o c 18TAP POSITION I N L (L S B )224192326496128160-0.6-0.8-0.4-0.200.20.40.60.81.0-1.00256VOLTAGE-DIVIDER DNL vs. TAP POSITION (MAX5489)M A x 5487-89 t o c 19TAP POSITIOND N L (L S B )224192326496128160-0.15-0.10-0.0500.050.100.150.20-0.200256-0.010-0.004-0.006-0.008-0.00200.0020.0040.0060.0080.010-4010-15356085END-TO-END RESISTANCE CHANGE vs. TEMPERATURE (MAX5487) M A X 5487-89 t o c 22TEMPERATURE (°C)R E S I S T A N C EC H A N G E (%)-100-80-90-60-70-40-50-30CROSSTALK vs. FREQUENCYFREQUENCY (kHz)C R O S S T A L K (d B )0.11101001000-0.010-0.004-0.006-0.008-0.00200.0020.0040.0060.0080.010-4010-1585END-TO-END RESISTANCE CHANGE vs. TEMPERATURE (MAX5488)M A X 5487-89 t o c 23TEMPERATURE (°C)R E S I S T A N C E C H A N G E (%)-0.010-0.004-0.006-0.008-0.00200.0020.0040.0060.0080.010-4010-15356085END-TO-END RESISTANCE CHANGE vs. TEMPERATURE (MAX5489)M A X 5487-89 t o c 24TEMPERATURE (°C)R E S I S T A N C E C H A N G E (%)Typical Operating Characteristics (continued)(V DD = +5.0V, T A = +25°C, unless otherwise noted.)M A X 5487/M A X 5488/M A X 5489Dual, 256-Tap, Nonvolatile, SPI-Interface,Linear-Taper Digital Potentiometers 8_______________________________________________________________________________________Detailed DescriptionThe MAX5487/MAX5488/MAX5489 contain two resistor arrays, with 255 resistive elements each. The MAX5487has an end-to-end resistance of 10k Ω, while the MAX5488 and MAX5489 have resistances of 50k Ωand 100k Ω, respectively. The MAX5487/MAX5488/MAX5489allow access to the high, low, and wiper terminals on both potentiometers for a standard voltage-divider con-figuration. Connect the wiper to the high terminal, and connect the low terminal to ground, to make the device a variable resistor (see Figure 1).A simple 3-wire serial interface programs either wiper directly to any of the 256 tap points. The nonvolatile memory stores the wiper position prior to power-down and recalls the wiper to the same point upon power-up or by using an interface command (see Table 1). The nonvolatile memory is guaranteed for 200,000 wiper store cycles and 50 years for wiper data retention.SPI Digital InterfaceThe MAX5487/MAX5488/MAX5489 use a 3-wire SPI-compatible serial data interface (Figures 2 and 3). This write-only interface contains three inputs: chip-select(CS ), data clock (SCLK), and data in (DIN). Drive CS low to enable the serial interface and clock data synchro-nously into the shift register on each SCLK rising edge.The WRITE commands (C1, C0 = 00 or 01) require 16clock cycles to clock in the command, address, and data (Figure 3a). The COPY commands (C1, C0 = 10, 11) can use either eight clock cycles to transfer only command and address bits (Figure 3b) or 16 clock cycles, with the device disregarding 8 data bits (Figure 3a). After loading data into the shift register, drive CS high to latch the data into the appropriate potentiometer control register and disable the serial interface. Keep CS low during the entire serial data stream to avoid cor-ruption of the data.Digital-Interface FormatThe data format consists of three elements: command bits, address bits, and data bits (see Table 1 and Figure 3). The command bits (C1 and C0) indicate the action to be taken such as changing or storing the wiper position. The address bits (A1 and A0) specify which potentiometer the command affects and the 8data bits (D7 to D0) specify the wiper position.Linear-Taper Digital Potentiometers_______________________________________________________________________________________9Write-Wiper Register (Command 00)Data written to the write-wiper registers (C1, C0 = 00)controls the wiper positions. The 8 data bits (D7 to D0)indicate the position of the wiper. For example, if DIN =0000 0000, the wiper moves to the position closest to L_. If DIN = 1111 1111, the wiper moves closest to H_.This command writes data to the volatile RAM, leaving the NV registers unchanged. When the device powers up,the data stored in the NV registers transfers to the volatile wiper register, moving the wiper to the stored position.Write-NV Register (Command 01)This command (C1, C0 = 01) stores the position of the wipers to the NV registers for use at power-up.Alternatively, the “copy wiper register to NV register”command can be used to store the position of the wipers to the NV registers. Writing to the NV registers does not affect the position of the wipers.Copy Wiper Register to NV Register (Command 10)This command (C1, C0 = 10) stores the current position of the wiper to the NV register, for use at power-up.Figure 2. Timing DiagramM A X 5487/M A X 5488/M A X 5489Dual, 256-Tap, Nonvolatile, SPI-Interface,Linear-Taper Digital Potentiometers 10______________________________________________________________________________________This command may affect one potentiometer at a time,or both simultaneously, depending on the state of A1and A0. Alternatively, the “write NV register” command can be used to store the current position of the wiper to the NV register.Copy NV Register to Wiper Register (Command 11)This command (C1, C0 = 11) restores the wiper position to the previously stored position in the NV register. This command may affect one potentiometer at a time, or both simultaneously, depending on the state of A1 and A0.Nonvolatile MemoryThe internal EEPROM consists of a nonvolatile register that retains the last stored value prior to power-down.The nonvolatile register is programmed to midscale at the factory. The nonvolatile memory is guaranteed for 200,000 wiper write cycles and 50 years for wiper data retention.Power-UpUpon power-up, the MAX5487/MAX5488/MAX5489load the data stored in the nonvolatile wiper register into the volatile memory register, updating the wiper position with the data stored in the nonvolatile wiper register. This initialization period takes 5µs.StandbyThe MAX5487/MAX5488/MAX5489 feature a low-power standby mode. When the device is not being pro-grammed, it enters into standby mode and supply cur-rent drops to 0.5µA (typ).Applications InformationThe MAX5487/MAX5488/MAX5489 are ideal for circuits requiring digitally controlled adjustable resistance,such as LCDFigures 4 and 5 show an application where the MAX5487/MAX5488/MAX5489 provide an adjustable,positive LCD-bias voltage. The op amp provides buffer-ing and gain to the resistor-divider network made by the potentiometer (Figure 4) or by a fixed resistor and a variable resistor (Figure 5).Programmable FilterFigure 6 shows the MAX5487/MAX5488/MAX5489 in a 1st-order programmable-filter application. Adjust the gain of the filter with R 2, and set the cutoff frequency with R 3.Figure 3. Digital-Interface FormatMAX5487/MAX5488/MAX5489Dual, 256-Tap, Nonvolatile, SPI-Interface,Linear-Taper Digital Potentiometers______________________________________________________________________________________11Use the following equations to calculate the gain (A)and the -3dB cutoff frequency (f C ):Adjustable Voltage ReferenceFigure 7 shows the MAX5487/MAX5488/MAX5489 usedas the feedback resistors in multiple adjustable volt-age-reference applications. Independently adjust the output voltages of the MAX6160s from 1.23V to V IN -0.2V by changing the wiper positions of the MAX5487/MAX5488/MAX5489.Offset Voltage and Gain AdjustmentConnect the high and low terminals of one potentiome-ter of a MAX5487/MAX5488/MAX5489 to the NULL inputs of aMAX410, and connect the wiper to the op amp’s positive supply to nullify the offset voltage over the operating temperature range. Install the other potentiometer in the feedback path to adjust the gain of the MAX410 (see Figure 8).Chip InformationTRANSISTOR COUNT: 12,177PROCESS: BiCMOSFigure 4. Positive LCD-Bias Control Using a Voltage-DividerFigure 5. Positive LCD-Bias Control Using a Variable ResistorFigure 6. Programmable FilterPin Configurations (continued)M A X 5487/M A X 5488/M A X 5489Dual, 256-Tap, Nonvolatile, SPI-Interface,Linear-Taper Digital Potentiometers12______________________________________________________________________________________Figure 7. Adjustable Voltage ReferenceFigure 8. Offset Voltage and Gain AdjustmentOrdering Information/Selector Guide (continued)*EP = Exposed pad**Future product—contact factory for availabilty .Revision HistoryPages changed at Rev3: 1, 8, 12, 15MAX5487/MAX5488/MAX5489Dual, 256-Tap, Nonvolatile, SPI-Interface,Linear-Taper Digital Potentiometers______________________________________________________________________________________13Package Information(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,go to /doc/010aa430376baf1ffc4fadca.html /packages .)M A X 5487/M A X 5488/M A X 5489Dual, 256-Tap, Nonvolatile, SPI-Interface,Linear-Taper Digital PotentiometersPackage Information(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,go to /doc/010aa430376baf1ffc4fadca.html /packages .)Dual, 256-Tap, Nonvolatile, SPI-Interface,Linear-Taper Digital PotentiometersMaxim 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.Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________15 2007 Maxim Integrated Productsis 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 /doc/010aa430376baf1ffc4fadca.html /packages.)MAX5487/MAX5488/MAX5489。
MA3X717E资料
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)
MAX1978中文数据手册
用于Peltier模块的集成温度控制器概论MAX1978 / MAX1979是用于Peltier热电冷却器（TEC）模块的最小, 最安全, 最精确完整的单芯片温度控制器。
片上功率FET和热控制环路电路可最大限度地减少外部元件, 同时保持高效率。
可选择的500kHz / 1MHz开关频率和独特的纹波消除方案可优化元件尺寸和效率, 同时降低噪声。
内部MOSFET的开关速度经过优化, 可降低噪声和EMI。
超低漂移斩波放大器可保持±0.001°C的温度稳定性。
直接控制输出电流而不是电压, 以消除电流浪涌。
独立的加热和冷却电流和电压限制提供最高水平的TEC保护。
MAX1978采用单电源供电, 通过在两个同步降压调节器的输出之间偏置TEC, 提供双极性±3A输出。
真正的双极性操作控制温度, 在低负载电流下没有“死区”或其他非线性。
当设定点非常接近自然操作点时, 控制系统不会捕获, 其中仅需要少量的加热或冷却。
模拟控制信号精确设置TEC 电流。
MAX1979提供高达6A的单极性输出。
提供斩波稳定的仪表放大器和高精度积分放大器, 以创建比例积分（PI）或比例积分微分（PID）控制器。
仪表放大器可以连接外部NTC或PTC热敏电阻, 热电偶或半导体温度传感器。
提供模拟输出以监控TEC温度和电流。
此外, 单独的过热和欠温输出表明当TEC温度超出范围时。
片上电压基准为热敏电阻桥提供偏置。
MAX1978 / MAX1979采用薄型48引脚薄型QFN-EP 封装, 工作在-40°C至+ 85°C温度范围。
采用外露金属焊盘的耐热增强型QFN-EP封装可最大限度地降低工作结温。
评估套件可用于加速设计。
应用光纤激光模块典型工作电路出现在数据手册的最后。
WDM, DWDM激光二极管温度控制光纤网络设备EDFA光放大器电信光纤接口ATE特征♦尺寸最小, 最安全, 最精确完整的单芯片控制器♦片上功率MOSFET-无外部FET♦电路占用面积<0.93in2♦回路高度<3mm♦温度稳定性为0.001°C♦集成精密积分器和斩波稳定运算放大器♦精确, 独立的加热和冷却电流限制♦通过直接控制TEC电流消除浪涌♦可调节差分TEC电压限制♦低纹波和低噪声设计♦TEC电流监视器♦温度监控器♦过温和欠温警报♦双极性±3A输出电流（MAX1978）♦单极性+ 6A输出电流（MAX1979）订购信息* EP =裸焊盘。
MAX4173FEUT-T中文资料
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
MAX247中文资料
General DescriptionThe MAX220–MAX249 family of line drivers/receivers is intended for all EIA/TIA-232E and V.28/V.24 communica-tions interfaces, particularly applications where ±12V is not available.These parts are especially useful in battery-powered sys-tems, since their low-power shutdown mode reduces power dissipation to less than 5µW. The MAX225,MAX233, MAX235, and MAX245/MAX246/MAX247 use no external components and are recommended for appli-cations where printed circuit board space is critical.________________________ApplicationsPortable Computers Low-Power Modems Interface TranslationBattery-Powered RS-232 Systems Multidrop RS-232 Networks____________________________Features Superior to Bipolaro Operate from Single +5V Power Supply (+5V and +12V—MAX231/MAX239)o Low-Power Receive Mode in Shutdown (MAX223/MAX242)o Meet All EIA/TIA-232E and V.28 Specifications o Multiple Drivers and Receiverso 3-State Driver and Receiver Outputs o Open-Line Detection (MAX243)Ordering InformationOrdering Information continued at end of data sheet.*Contact factory for dice specifications.MAX220–MAX249+5V-Powered, Multichannel RS-232Drivers/Receivers________________________________________________________________Maxim Integrated Products 1Selection Table19-4323; Rev 9; 4/00Power No. of NominalSHDN RxPart Supply RS-232No. of Cap. Value & Three-Active in Data Rate Number (V)Drivers/Rx Ext. Caps (µF)State SHDN (kbps)FeaturesMAX220+52/24 4.7/10No —120Ultra-low-power, industry-standard pinout MAX222+52/2 4 0.1Yes —200Low-power shutdownMAX223 (MAX213)+54/54 1.0 (0.1)Yes ✔120MAX241 and receivers active in shutdown MAX225+55/50—Yes ✔120Available in SOMAX230 (MAX200)+55/04 1.0 (0.1)Yes —120 5 drivers with shutdownMAX231 (MAX201)+5 and2/2 2 1.0 (0.1)No —120Standard +5/+12V or battery supplies; +7.5 to +13.2same functions as MAX232MAX232 (MAX202)+52/24 1.0 (0.1)No —120 (64)Industry standardMAX232A+52/240.1No —200Higher slew rate, small caps MAX233 (MAX203)+52/20— No —120No external capsMAX233A+52/20—No —200No external caps, high slew rate MAX234 (MAX204)+54/04 1.0 (0.1)No —120Replaces 1488MAX235 (MAX205)+55/50—Yes —120No external capsMAX236 (MAX206)+54/34 1.0 (0.1)Yes —120Shutdown, three stateMAX237 (MAX207)+55/34 1.0 (0.1)No —120Complements IBM PC serial port MAX238 (MAX208)+54/44 1.0 (0.1)No —120Replaces 1488 and 1489MAX239 (MAX209)+5 and3/52 1.0 (0.1)No —120Standard +5/+12V or battery supplies;+7.5 to +13.2single-package solution for IBM PC serial port MAX240+55/54 1.0Yes —120DIP or flatpack package MAX241 (MAX211)+54/54 1.0 (0.1)Yes —120Complete IBM PC serial port MAX242+52/240.1Yes ✔200Separate shutdown and enableMAX243+52/240.1No —200Open-line detection simplifies cabling MAX244+58/104 1.0No —120High slew rateMAX245+58/100—Yes ✔120High slew rate, int. caps, two shutdown modes MAX246+58/100—Yes ✔120High slew rate, int. caps, three shutdown modes MAX247+58/90—Yes ✔120High slew rate, int. caps, nine operating modes MAX248+58/84 1.0Yes ✔120High slew rate, selective half-chip enables MAX249+56/1041.0Yes✔120Available in quad flatpack packageFor free samples & the latest literature: , or phone 1-800-998-8800.For small orders, phone 1-800-835-8769.M A X 220–M A X 249+5V-Powered, Multichannel RS-232Drivers/ReceiversABSOLUTE MAXIMUM RATINGS—MAX220/222/232A/233A/242/243ELECTRICAL CHARACTERISTICS—MAX220/222/232A/233A/242/243(V CC = +5V ±10%, C1–C4 = 0.1µF‚ MAX220, C1 = 0.047µF, C2–C4 = 0.33µF, T A = T MIN to T MAX ‚ unless otherwise noted.)Note 1:Input voltage measured with T OUT in high-impedance state, SHDN or V CC = 0V.Note 2:For the MAX220, V+ and V- can have a maximum magnitude of 7V, but their absolute difference cannot exceed 13V.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 )...............................................-0.3V to +6V Input VoltagesT IN ..............................................................-0.3V to (V CC - 0.3V)R IN (Except MAX220)........................................................±30V R IN (MAX220).....................................................................±25V T OUT (Except MAX220) (Note 1).......................................±15V T OUT (MAX220)...............................................................±13.2V Output VoltagesT OUT ...................................................................................±15V R OUT .........................................................-0.3V to (V CC + 0.3V)Driver/Receiver Output Short Circuited to GND.........Continuous Continuous Power Dissipation (T A = +70°C)16-Pin Plastic DIP (derate 10.53mW/°C above +70°C)....842mW 18-Pin Plastic DIP (derate 11.11mW/°C above +70°C)....889mW20-Pin Plastic DIP (derate 8.00mW/°C above +70°C)..440mW 16-Pin Narrow SO (derate 8.70mW/°C above +70°C)...696mW 16-Pin Wide SO (derate 9.52mW/°C above +70°C)......762mW 18-Pin Wide SO (derate 9.52mW/°C above +70°C)......762mW 20-Pin Wide SO (derate 10.00mW/°C above +70°C)....800mW 20-Pin SSOP (derate 8.00mW/°C above +70°C)..........640mW 16-Pin CERDIP (derate 10.00mW/°C above +70°C).....800mW 18-Pin CERDIP (derate 10.53mW/°C above +70°C).....842mW Operating Temperature RangesMAX2_ _AC_ _, MAX2_ _C_ _.............................0°C to +70°C MAX2_ _AE_ _, MAX2_ _E_ _..........................-40°C to +85°C MAX2_ _AM_ _, MAX2_ _M_ _.......................-55°C to +125°C Storage Temperature Range.............................-65°C to +160°C Lead Temperature (soldering, 10sec).............................+300°CMAX220–MAX249+5V-Powered, Multichannel RS-232Drivers/Receivers_______________________________________________________________________________________3Note 3:MAX243 R2OUT is guaranteed to be low when R2IN is ≥0V or is floating.ELECTRICAL CHARACTERISTICS—MAX220/222/232A/233A/242/243 (continued)(V= +5V ±10%, C1–C4 = 0.1µF‚ MAX220, C1 = 0.047µF, C2–C4 = 0.33µF, T = T to T ‚ unless otherwise noted.)M A X 220–M A X 249+5V-Powered, Multichannel RS-232Drivers/Receivers 4_________________________________________________________________________________________________________________________________Typical Operating CharacteristicsMAX220/MAX222/MAX232A/MAX233A/MAX242/MAX243108-1051525OUTPUT VOLTAGE vs. LOAD CURRENT-4-6-8-2642LOAD CURRENT (mA)O U T P U T V O L T A G E (V )1002011104104060AVAILABLE OUTPUT CURRENTvs. DATA RATE65798DATA RATE (kbits/sec)O U T P U T C U R R E N T (m A )203050+10V-10VMAX222/MAX242ON-TIME EXITING SHUTDOWN+5V +5V 0V0V 500µs/div V +, V - V O L T A G E (V )MAX220–MAX249+5V-Powered, Multichannel RS-232Drivers/Receivers_______________________________________________________________________________________5V CC ...........................................................................-0.3V to +6V V+................................................................(V CC - 0.3V) to +14V V-............................................................................+0.3V to -14V Input VoltagesT IN ............................................................-0.3V to (V CC + 0.3V)R IN ......................................................................................±30V Output VoltagesT OUT ...................................................(V+ + 0.3V) to (V- - 0.3V)R OUT .........................................................-0.3V to (V CC + 0.3V)Short-Circuit Duration, T OUT ......................................Continuous Continuous Power Dissipation (T A = +70°C)14-Pin Plastic DIP (derate 10.00mW/°C above +70°C)....800mW 16-Pin Plastic DIP (derate 10.53mW/°C above +70°C)....842mW 20-Pin Plastic DIP (derate 11.11mW/°C above +70°C)....889mW 24-Pin Narrow Plastic DIP(derate 13.33mW/°C above +70°C)..........1.07W24-Pin Plastic DIP (derate 9.09mW/°C above +70°C)......500mW 16-Pin Wide SO (derate 9.52mW/°C above +70°C).........762mW20-Pin Wide SO (derate 10 00mW/°C above +70°C).......800mW 24-Pin Wide SO (derate 11.76mW/°C above +70°C).......941mW 28-Pin Wide SO (derate 12.50mW/°C above +70°C) .............1W 44-Pin Plastic FP (derate 11.11mW/°C above +70°C).....889mW 14-Pin CERDIP (derate 9.09mW/°C above +70°C)..........727mW 16-Pin CERDIP (derate 10.00mW/°C above +70°C)........800mW 20-Pin CERDIP (derate 11.11mW/°C above +70°C)........889mW 24-Pin Narrow CERDIP(derate 12.50mW/°C above +70°C)..............1W24-Pin Sidebraze (derate 20.0mW/°C above +70°C)..........1.6W 28-Pin SSOP (derate 9.52mW/°C above +70°C).............762mW Operating Temperature RangesMAX2 _ _ C _ _......................................................0°C to +70°C MAX2 _ _ E _ _...................................................-40°C to +85°C MAX2 _ _ M _ _ ...............................................-55°C to +125°C Storage Temperature Range.............................-65°C to +160°C Lead Temperature (soldering, 10sec).............................+300°CABSOLUTE MAXIMUM RATINGS—MAX223/MAX230–MAX241ELECTRICAL CHARACTERISTICS—MAX223/MAX230–MAX241(MAX223/230/232/234/236/237/238/240/241, V CC = +5V ±10; MAX233/MAX235, V CC = 5V ±5%‚ C1–C4 = 1.0µF; MAX231/MAX239,V CC = 5V ±10%; V+ = 7.5V to 13.2V; T A = T MIN to T MAX ; unless otherwise noted.)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.M A X 220–M A X 249+5V-Powered, Multichannel RS-232Drivers/Receivers 6_______________________________________________________________________________________ELECTRICAL CHARACTERISTICS—MAX223/MAX230–MAX241 (continued)(MAX223/230/232/234/236/237/238/240/241, V CC = +5V ±10; MAX233/MAX235, V CC = 5V ±5%‚ C1–C4 = 1.0µF; MAX231/MAX239,V CC = 5V ±10%; V+ = 7.5V to 13.2V; T A = T MIN to T MAX ; unless otherwise noted.)MAX220–MAX249+5V-Powered, Multichannel RS-232Drivers/Receivers_______________________________________________________________________________________78.56.54.55.5TRANSMITTER OUTPUT VOLTAGE (V OH ) vs. V CC7.08.0V CC (V)V O H (V )5.07.57.46.02500TRANSMITTER OUTPUT VOLTAGE (V OH )vs. LOAD CAPACITANCE AT DIFFERENT DATA RATES6.46.27.27.0LOAD CAPACITANCE (pF)V O H (V )1500100050020006.86.612.04.02500TRANSMITTER SLEW RATE vs. LOAD CAPACITANCE6.05.011.09.010.0LOAD CAPACITANCE (pF)S L E W R A T E (V /µs )1500100050020008.07.0-6.0-9.04.55.5TRANSMITTER OUTPUT VOLTAGE (V OL ) vs. V CC-8.0-8.5-6.5-7.0V CC (V)V O L (V )5.0-7.5-6.0-7.62500TRANSMITTER OUTPUT VOLTAGE (V OL )vs. LOAD CAPACITANCE AT DIFFERENT DATA RATES-7.0-7.2-7.4-6.2-6.4LOAD CAPACITANCE (pF)V O L (V )150010005002000-6.6-6.810-105101520253035404550TRANSMITTER OUTPUT VOLTAGE (V+, V-)vs. LOAD CURRENT-2-6-4-886CURRENT (mA)V +, V - (V )420__________________________________________Typical Operating CharacteristicsMAX223/MAX230–MAX241*SHUTDOWN POLARITY IS REVERSED FOR NON MAX241 PARTSV+, V- WHEN EXITING SHUTDOWN(1µF CAPACITORS)MAX220-13SHDN*V-O V+500ms/divM A X 220–M A X 249+5V-Powered, Multichannel RS-232Drivers/Receivers 8_______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGS—MAX225/MAX244–MAX249ELECTRICAL CHARACTERISTICS—MAX225/MAX244–MAX249(MAX225, V CC = 5.0V ±5%; MAX244–MAX249, V CC = +5.0V ±10%, external capacitors C1–C4 = 1µF; T A = T MIN to T MAX ; unless oth-erwise noted.)Note 4:Input voltage measured with transmitter output in a high-impedance state, shutdown, or V CC = 0V.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 )...............................................-0.3V to +6V Input VoltagesT IN ‚ ENA , ENB , ENR , ENT , ENRA ,ENRB , ENTA , ENTB ..................................-0.3V to (V CC + 0.3V)R IN .....................................................................................±25V T OUT (Note 3).....................................................................±15V R OUT ........................................................-0.3V to (V CC + 0.3V)Short Circuit (one output at a time)T OUT to GND............................................................Continuous R OUT to GND............................................................ContinuousContinuous Power Dissipation (T A = +70°C)28-Pin Wide SO (derate 12.50mW/°C above +70°C).............1W 40-Pin Plastic DIP (derate 11.11mW/°C above +70°C)...611mW 44-Pin PLCC (derate 13.33mW/°C above +70°C)...........1.07W Operating Temperature RangesMAX225C_ _, MAX24_C_ _ ..................................0°C to +70°C MAX225E_ _, MAX24_E_ _ ...............................-40°C to +85°C Storage Temperature Range.............................-65°C to +160°C Lead Temperature (soldering,10sec)..............................+300°CMAX220–MAX249+5V-Powered, Multichannel RS-232Drivers/Receivers_______________________________________________________________________________________9Note 5:The 300Ωminimum specification complies with EIA/TIA-232E, but the actual resistance when in shutdown mode or V CC =0V is 10M Ωas is implied by the leakage specification.ELECTRICAL CHARACTERISTICS—MAX225/MAX244–MAX249 (continued)(MAX225, V CC = 5.0V ±5%; MAX244–MAX249, V CC = +5.0V ±10%, external capacitors C1–C4 = 1µF; T A = T MIN to T MAX ; unless oth-erwise noted.)M A X 220–M A X 249+5V-Powered, Multichannel RS-232Drivers/Receivers 10________________________________________________________________________________________________________________________________Typical Operating CharacteristicsMAX225/MAX244–MAX24918212345TRANSMITTER SLEW RATE vs. LOAD CAPACITANCE86416LOAD CAPACITANCE (nF)T R A N S M I T T E R S L E W R A T E (V /µs )14121010-105101520253035OUTPUT VOLTAGEvs. LOAD CURRENT FOR V+ AND V--2-4-6-88LOAD CURRENT (mA)O U T P U T V O L T A G E (V )64209.05.012345TRANSMITTER OUTPUT VOLTAGE (V+, V-)vs. LOAD CAPACITANCE AT DIFFERENT DATA RATES6.05.58.5LOAD CAPACITANCE (nF)V +, V (V )8.07.57.06.5MAX220–MAX249Drivers/Receivers______________________________________________________________________________________11Figure 1. Transmitter Propagation-Delay Timing Figure 2. Receiver Propagation-Delay TimingFigure 3. Receiver-Output Enable and Disable Timing Figure 4. Transmitter-Output Disable TimingM A X 220–M A X 249Drivers/Receivers 12______________________________________________________________________________________ENT ENR OPERATION STATUS TRANSMITTERSRECEIVERS00Normal Operation All Active All Active 01Normal Operation All Active All 3-State10Shutdown All 3-State All Low-Power Receive Mode 11ShutdownAll 3-StateAll 3-StateTable 1a. MAX245 Control Pin ConfigurationsENT ENR OPERATION STATUS TRANSMITTERS RECEIVERSTA1–TA4TB1–TB4RA1–RA5RB1–RB500Normal Operation All Active All Active All Active All Active 01Normal Operation All Active All Active RA1–RA4 3-State,RA5 Active RB1–RB4 3-State,RB5 Active 1ShutdownAll 3-StateAll 3-StateAll Low-Power Receive Mode All Low-Power Receive Mode 11Shutdown All 3-State All 3-StateRA1–RA4 3-State,RA5 Low-Power Receive ModeRB1–RB4 3-State,RB5 Low-Power Receive ModeTable 1b. MAX245 Control Pin ConfigurationsTable 1c. MAX246 Control Pin ConfigurationsENA ENB OPERATION STATUS TRANSMITTERS RECEIVERSTA1–TA4TB1–TB4RA1–RA5RB1–RB500Normal Operation All Active All Active All Active All Active 01Normal Operation All Active All 3-State All Active RB1–RB4 3-State,RB5 Active 1ShutdownAll 3-StateAll ActiveRA1–RA4 3-State,RA5 Active All Active 11Shutdown All 3-State All 3-StateRA1–RA4 3-State,RA5 Low-Power Receive ModeRB1–RB4 3-State,RA5 Low-Power Receive ModeMAX220–MAX249Drivers/Receivers______________________________________________________________________________________13Table 1d. MAX247/MAX248/MAX249 Control Pin ConfigurationsM A X 220–M A X 249_______________Detailed DescriptionThe MAX220–MAX249 contain four sections: dual charge-pump DC-DC voltage converters, RS-232 dri-vers, RS-232 receivers, and receiver and transmitter enable control inputs.Dual Charge-Pump Voltage ConverterThe MAX220–MAX249 have two internal charge-pumps that convert +5V to ±10V (unloaded) for RS-232 driver operation. The first converter uses capacitor C1 to dou-ble the +5V input to +10V on C3 at the V+ output. The second converter uses capacitor C2 to invert +10V to -10V on C4 at the V- output.A small amount of power may be drawn from the +10V (V+) and -10V (V-) outputs to power external circuitry (see the Typical Operating Characteristics section),except on the MAX225 and MAX245–MAX247, where these pins are not available. V+ and V- are not regulated,so the output voltage drops with increasing load current.Do not load V+ and V- to a point that violates the mini-mum ±5V EIA/TIA-232E driver output voltage when sourcing current from V+ and V- to external circuitry. When using the shutdown feature in the MAX222,MAX225, MAX230, MAX235, MAX236, MAX240,MAX241, and MAX245–MAX249, avoid using V+ and V-to power external circuitry. When these parts are shut down, V- falls to 0V, and V+ falls to +5V. For applica-tions where a +10V external supply is applied to the V+pin (instead of using the internal charge pump to gen-erate +10V), the C1 capacitor must not be installed and the SHDN pin must be tied to V CC . This is because V+is internally connected to V CC in shutdown mode.RS-232 DriversThe typical driver output voltage swing is ±8V when loaded with a nominal 5k ΩRS-232 receiver and V CC =+5V. Output swing is guaranteed to meet the EIA/TIA-232E and V.28 specification, which calls for ±5V mini-mum driver output levels under worst-case conditions.These include a minimum 3k Ωload, V CC = +4.5V, and maximum operating temperature. Unloaded driver out-put voltage ranges from (V+ -1.3V) to (V- +0.5V). Input thresholds are both TTL and CMOS compatible.The inputs of unused drivers can be left unconnected since 400k Ωinput pull-up resistors to V CC are built in (except for the MAX220). The pull-up resistors force the outputs of unused drivers low because all drivers invert.The internal input pull-up resistors typically source 12µA,except in shutdown mode where the pull-ups are dis-abled. Driver outputs turn off and enter a high-imped-ance state—where leakage current is typically microamperes (maximum 25µA)—when in shutdownmode, in three-state mode, or when device power is removed. Outputs can be driven to ±15V. The power-supply current typically drops to 8µA in shutdown mode.The MAX220 does not have pull-up resistors to force the ouputs of the unused drivers low. Connect unused inputs to GND or V CC .The MAX239 has a receiver three-state control line, and the MAX223, MAX225, MAX235, MAX236, MAX240,and MAX241 have both a receiver three-state control line and a low-power shutdown control. Table 2 shows the effects of the shutdown control and receiver three-state control on the receiver outputs.The receiver TTL/CMOS outputs are in a high-imped-ance, three-state mode whenever the three-state enable line is high (for the MAX225/MAX235/MAX236/MAX239–MAX241), and are also high-impedance whenever the shutdown control line is high.When in low-power shutdown mode, the driver outputs are turned off and their leakage current is less than 1µA with the driver output pulled to ground. The driver output leakage remains less than 1µA, even if the transmitter output is backdriven between 0V and (V CC + 6V). Below -0.5V, the transmitter is diode clamped to ground with 1k Ωseries impedance. The transmitter is also zener clamped to approximately V CC + 6V, with a series impedance of 1k Ω.The driver output slew rate is limited to less than 30V/µs as required by the EIA/TIA-232E and V.28 specifica-tions. Typical slew rates are 24V/µs unloaded and 10V/µs loaded with 3Ωand 2500pF.RS-232 ReceiversEIA/TIA-232E and V.28 specifications define a voltage level greater than 3V as a logic 0, so all receivers invert.Input thresholds are set at 0.8V and 2.4V, so receivers respond to TTL level inputs as well as EIA/TIA-232E and V.28 levels.The receiver inputs withstand an input overvoltage up to ±25V and provide input terminating resistors withDrivers/Receivers 14Table 2. Three-State Control of ReceiversMAX220–MAX249Drivers/Receivers______________________________________________________________________________________15nominal 5k Ωvalues. The receivers implement Type 1interpretation of the fault conditions of V.28 and EIA/TIA-232E.The receiver input hysteresis is typically 0.5V with a guaranteed minimum of 0.2V. This produces clear out-put transitions with slow-moving input signals, even with moderate amounts of noise and ringing. The receiver propagation delay is typically 600ns and is independent of input swing direction.Low-Power Receive ModeThe low-power receive-mode feature of the MAX223,MAX242, and MAX245–MAX249 puts the IC into shut-down mode but still allows it to receive information. This is important for applications where systems are periodi-cally awakened to look for activity. Using low-power receive mode, the system can still receive a signal that will activate it on command and prepare it for communi-cation at faster data rates. This operation conserves system power.Negative Threshold—MAX243The MAX243 is pin compatible with the MAX232A, differ-ing only in that RS-232 cable fault protection is removed on one of the two receiver inputs. This means that control lines such as CTS and RTS can either be driven or left floating without interrupting communication. Different cables are not needed to interface with different pieces of equipment.The input threshold of the receiver without cable fault protection is -0.8V rather than +1.4V. Its output goes positive only if the input is connected to a control line that is actively driven negative. If not driven, it defaults to the 0 or “OK to send” state. Normally‚ the MAX243’s other receiver (+1.4V threshold) is used for the data line (TD or RD)‚ while the negative threshold receiver is con-nected to the control line (DTR‚ DTS‚ CTS‚ RTS, etc.). Other members of the RS-232 family implement the optional cable fault protection as specified by EIA/TIA-232E specifications. This means a receiver output goes high whenever its input is driven negative‚ left floating‚or shorted to ground. The high output tells the serial communications IC to stop sending data. To avoid this‚the control lines must either be driven or connected with jumpers to an appropriate positive voltage level.Shutdown—MAX222–MAX242On the MAX222‚ MAX235‚ MAX236‚ MAX240‚ and MAX241‚ all receivers are disabled during shutdown.On the MAX223 and MAX242‚ two receivers continue to operate in a reduced power mode when the chip is in shutdown. Under these conditions‚ the propagation delay increases to about 2.5µs for a high-to-low input transition. When in shutdown, the receiver acts as a CMOS inverter with no hysteresis. The MAX223 and MAX242 also have a receiver output enable input (EN for the MAX242 and EN for the MAX223) that allows receiver output control independent of SHDN (SHDN for MAX241). With all other devices‚ SHDN (SH DN for MAX241) also disables the receiver outputs.The MAX225 provides five transmitters and five receivers‚ while the MAX245 provides ten receivers and eight transmitters. Both devices have separate receiver and transmitter-enable controls. The charge pumps turn off and the devices shut down when a logic high is applied to the ENT input. In this state, the supply cur-rent drops to less than 25µA and the receivers continue to operate in a low-power receive mode. Driver outputs enter a high-impedance state (three-state mode). On the MAX225‚ all five receivers are controlled by the ENR input. On the MAX245‚ eight of the receiver out-puts are controlled by the ENR input‚ while the remain-ing two receivers (RA5 and RB5) are always active.RA1–RA4 and RB1–RB4 are put in a three-state mode when ENR is a logic high.Receiver and Transmitter EnableControl InputsThe MAX225 and MAX245–MAX249 feature transmitter and receiver enable controls.The receivers have three modes of operation: full-speed receive (normal active)‚ three-state (disabled)‚ and low-power receive (enabled receivers continue to function at lower data rates). The receiver enable inputs control the full-speed receive and three-state modes. The transmitters have two modes of operation: full-speed transmit (normal active) and three-state (disabled). The transmitter enable inputs also control the shutdown mode. The device enters shutdown mode when all transmitters are disabled. Enabled receivers function in the low-power receive mode when in shutdown.M A X 220–M A X 249Tables 1a–1d define the control states. The MAX244has no control pins and is not included in these tables. The MAX246 has ten receivers and eight drivers with two control pins, each controlling one side of the device. A logic high at the A-side control input (ENA )causes the four A-side receivers and drivers to go into a three-state mode. Similarly, the B-side control input (ENB ) causes the four B-side drivers and receivers to go into a three-state mode. As in the MAX245, one A-side and one B-side receiver (RA5 and RB5) remain active at all times. The entire device is put into shut-down mode when both the A and B sides are disabled (ENA = ENB = +5V).The MAX247 provides nine receivers and eight drivers with four control pins. The ENRA and ENRB receiver enable inputs each control four receiver outputs. The ENTA and ENTB transmitter enable inputs each control four drivers. The ninth receiver (RB5) is always active.The device enters shutdown mode with a logic high on both ENTA and ENTB .The MAX248 provides eight receivers and eight drivers with four control pins. The ENRA and ENRB receiver enable inputs each control four receiver outputs. The ENTA and ENTB transmitter enable inputs control four drivers each. This part does not have an always-active receiver. The device enters shutdown mode and trans-mitters go into a three-state mode with a logic high on both ENTA and ENTB .The MAX249 provides ten receivers and six drivers with four control pins. The ENRA and ENRB receiver enable inputs each control five receiver outputs. The ENTA and ENTB transmitter enable inputs control three dri-vers each. There is no always-active receiver. The device enters shutdown mode and transmitters go into a three-state mode with a logic high on both ENTA and ENTB . In shutdown mode, active receivers operate in a low-power receive mode at data rates up to 20kbits/sec.__________Applications InformationFigures 5 through 25 show pin configurations and typi-cal operating circuits. In applications that are sensitive to power-supply noise, V CC should be decoupled to ground with a capacitor of the same value as C1 and C2 connected as close as possible to the device.Drivers/Receivers16______________________________________________________________________________________。
MAX5971AETI+;MAX5971AETI+T;中文规格书,Datasheet资料
TION KIT EVALUA BLE AVAILA
Single-Port, 40W, IEEE 802.3af/at PSE Controller with Integrated MOSFET
Features
S IEEE 802.3af/at Compliant S Up to 40W for Single-Port PSE Applications S Integrated 0.5I Power MOSFET and Sense
Detections
S Current Foldback and Duty Cycle-Controlled
Current Limit
S LED Indicator for Port Status S Direct Fast-Shutdown Control Capability S Space-Saving, 28-Pin TQFN (5mm x 5mm)
+Denotes a lead(Pb)-free/RoHS-compliant package. *EP = Exposed pad.
Typical Operating Circuit
PSE OUTPUT
AGND OUT OUTP
-54V
VEE VEE_DIG LED PWMEN LEGACY MIDSPAN OSC EN
MAX5971A
Resistor
S PD Detection and Classification S Programmable Current Limit for Class 5 PDs S High-Capacitance Detection for Legacy Devices S Supports Both DC and AC Load Removal
2SJ517中文资料
–8 –12 –16 –20
Drain to Source Voltage V DS (V)
Dynamic Input Characteristics
0
0
V DD = –5 V –10 V
–10
–4
VDS
–20
–8
V DD = –5 V
–30
–10 V
–12
VGS
–40
–16
–50 0
4
8
12 16
Drain to Source Saturation Voltage vs. Gate to Source Voltage
–1.0 Pulse Test
–0.8
–0.6
–0.4 I D = –2 A
–0.2
–1 A
–0.5 A
0
–2 –4 –6 –8 –10
Gate to Source Voltage V GS (V)
2SJ517
Silicon P Channel MOS FET High Speed Power Switching
Features
• Low on-resistance RDS(on) = 0.18 Ω typ. (at VGS =–4V, ID =–1A)
• Low drive current • High speed switching • 2.5V gate drive devices.
–2
Channel dissipation
Pch Note2
1
Channel temperature
Tch
150
Storage temperature
Tstg
–55 to +150
MAX5417NETA+T中文资料
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.
芯片MAX517使用
MAX517的串行D/A转换8引脚，SDA数据端SCL时钟端，空闲时皆为1；SCL=1.SDA变低数据开始传送；SCL=1,SDA变高数据传送结束。
使用时AD1AD2接地；由于一个通道，１Ｉ２Ｃ总线的特点及基本通信协议Ｉ２Ｃ总线是Ｐｈｉｌｉｐｓ公司开发的一种简单、双向二线制同步串行总线。
它只需要两根线 串行数据线和串行时钟线即可使连接于总线上的器件之间实现信息传送，同时可通过对器件进行软件寻址，而不是对硬件进行片选寻址的方式来节约通信线数目，从而减少了硬件所占空间。
因为总线已集成在片内，所以大大缩短了设计时间，此外，在从系统中移去或增加集成电路芯片时，对总线上的其它集成芯片没有影响。
１．１Ｉ２Ｃ总线的主要特点Ｉ２Ｃ总线通常由两根线构成：串行数据线（ＳＤＡ）和串行时钟线（ＳＣＬ）；总线上所有的器件都可以通过软件寻址，并保持简单的主从关系，其中主器件既可以作为发送器，又可以作为接收器；Ｉ２Ｃ总线是一个真正的多主总线，它带有竞争监测和仲裁电路。
当多个主器件同时启动设备时，总线系统会自动进行冲突监测及仲裁，从而确保了数据的正确性；Ｉ２Ｃ总线采用８位、双向串行数据传送方式，标准传送速率为１００ｋＢ／ｓ，快速方式下可达４００ｋＢ／ｓ；同步时钟可以作为停止或重新启动串行口发送的握手方式；连接到同一总线的集成电路数目只受４００ｐＦ的最大总线电容的限制。
１．２Ｉ２Ｃ总线数据通信基本协议利用Ｉ２Ｃ总线进行数据通信时，应遵守如下基本操作：（１）总线应处于不忙状态，当数据总线（ＳＤＡ）和时钟总线（ＳＣＬ）都为高电平时，为不忙状态；（２）当ＳＣＬ为高电平时，ＳＤＡ电平由高变低时，数据传送开始。
所有的操作必须在开始之后进行；（３）当ＳＣＬ为高电平时，ＳＤＡ电平由低变为高时，数据传送结束。
在结束条件下，所有的操作都不能进行；（４）数据的有效转换开始后，当时钟线ＳＣＬ为高电平时，数据线ＳＤＡ必须保持稳定。
若数据线ＳＤＡ改变时，必须在时钟线ＳＣＬ为低电平时方可进行。
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For free samples & the latest literature: , or phone 1-800-998-8800.For small orders, phone 1-800-835-8769.General DescriptionThe MAX5175/MAX5177 low-power, serial, voltage-out-put, 12-bit digital-to-analog converters (DACs) feature a precision output amplifier in a space-saving 16-pin QSOP package. The MAX5175 operates from a single +5V supply, and the MAX5177 operates from a single +3V supply. The output amplifier’s inverting input is available to allow specific gain configurations, remote sensing, and high output current capability. This makes the MAX5175/MAX5177 ideal for a wide range of appli-cations, including industrial process control. Both devices draw only 260µA of supply current, which reduces to 1µA in shutdown mode. In addition, the pro-grammable power-up reset feature allows for a user-selectable output voltage state of either 0 or midscale.The 3-wire serial interface is compatible with SPI™,QSPI™, and MICROWIRE™ standards. An input register followed by a DAC register provides a double-buffered input, allowing the registers to be updated independent-ly or simultaneously with a 16-bit serial word. Additional features include software and hardware shutdown, shut-down lockout, a hardware reset pin, and a reference input capable of accepting DC and offset AC signals.These devices provide a programmable digital output pin for added functionality and a serial-data output pin for daisy-chaining. All logic inputs are TTL/CMOS com-patible and are internally buffered with Schmitt triggers to allow direct interfacing to optocouplers.The MAX5175/MAX5177 incorporate a proprietary on-chip circuit that keeps the output voltage virtually “glitch free,”limiting the glitches to a few millivolts during power-up.Both devices come in 16-pin QSOP packages and are specified for the extended (-40°C to +85°C) temperature range. The MAX5171/MAX5173 are 14-bit pin-compatible upgrades to the MAX5175/MAX5177. For pin-compatible DACs with an internal reference, see the 13-bit MAX5132/MAX5133 and 12-bit MAX5122/MAX5123.ApplicationsDigitally Programmable 4–20mA Current Loops Industrial Process ControlsDigital Offset and Gain Adjustment Motion ControlAutomatic Test Equipment (ATE)Remote Industrial Controls µP-Controlled SystemsFeatureso ±1 LSB INLo 1µA Shutdown Currento “Glitch Free” Output Voltage at Power-Up o Single-Supply Operation+5V (MAX5175)+3V (MAX5177)o Full-Scale Output Range+2.048V (MAX5177, V REF = +1.25V)+4.096V (MAX5175, V REF = +2.5V)o Rail-to-Rail ®Output Amplifier o Adjustable Output Offseto Low THD (-80dB) in Multiplying Operation o SPI/QSPI/MICROWIRE-Compatible 3-Wire Serial Interface o Programmable Shutdown Mode and Power-Up Reset (0 or midscale)o Buffered Output Capable of Driving 4–20mA or 5k Ω|| 100pF Loads o User-Programmable Digital Output Pin Allows Serial Control of External Components o 14-Bit Upgrades Available (MAX5171/MAX5173)MAX5175/MAX5177Low-Power, Serial, 12-Bit DACs withForce/Sense Voltage Output________________________________________________________________Maxim Integrated Products119-1477; Rev 0; 4/99Functional Diagram appears at end of data sheet.Pin ConfigurationOrdering InformationSPI and QSPI are trademarks of Motorola, Inc.MICROWIRE is a trademark of National Semiconductor Corp.Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.M A X 5175/M A X 5177Low-Power, Serial, 12-Bit DACs with Force/Sense Voltage Output 2_______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGSELECTRICAL CHARACTERISTICS—MAX5175(V DD = +5V ±10%, V REF = 2.5V, AGND = DGND, FB = OUT, R L = 5k Ω, C L = 100pF referenced to ground, T A = T MIN to T MAX , unless otherwise noted. Typical values are at 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.V DD to AGND, DGND...............................................-0.3V to +6V AGND to DGND.....................................................-0.3V to +0.3V Digital Inputs to DGND.............................................-0.3V to +6V DOUT, UPO to DGND................................-0.3V to (V DD + 0.3V)FB, OUT REF to AGND...............................-0.3V to (V DD + 0.3V)Maximum Current into Any Pin............................................50mAContinuous Power Dissipation (T A = +70°C)16-Pin QSOP (derate 8mW/°C above +70°C)...............667mW Operating Temperature Range.............................-40°C to +85°C Storage Temperature Range.............................-65°C to +150°C Lead Temperature (soldering, 10sec).............................+300°CMAX5175/MAX5177Low-Power, Serial, 12-Bit DACs withForce/Sense Voltage Output_______________________________________________________________________________________3ELECTRICAL CHARACTERISTICS—MAX5175 (continued)(V DD = +5V ±10%, V REF = 2.5V, AGND = DGND, FB = OUT, R L = 5k Ω, C L = 100pF referenced to ground, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.)M A X 5175/M A X 5177Low-Power, Serial, 12-Bit DACs with Force/Sense Voltage Output 4_______________________________________________________________________________________ELECTRICAL CHARACTERISTICS—MAX5177(V DD = +2.7V to +3.6V, V REF = 1.25V, AGND = DGND, FB = OUT, R L = 5k Ω, C L = 100pF referenced to ground, T A = T MIN to T MAX ,unless otherwise noted. Typical values are at T A = +25°C.)MAX5175/MAX5177Low-Power, Serial, 12-Bit DACs withForce/Sense Voltage Output_______________________________________________________________________________________5Note 1:INL guaranteed between codes 16 and 4095.Note 2:Offset is measured at the code that comes closest to 10mV.Note 3:Accuracy is better than 1LSB for V OUT = 10mV to V DD - 180mV. Guaranteed by PSR test on end points.Note 4:R L = open and digital inputs are either V DD or DGND.Note 5:INL guaranteed between codes 32 and 4095.ELECTRICAL CHARACTERISTICS—MAX5177 (continued)(V DD = +2.7V to +3.6V, V REF = 1.25V, AGND = DGND, FB = OUT, R L = 5k Ω, C L = 100pF referenced to ground, T A = T MIN to T MAX ,unless otherwise noted. Typical values are at T A = +25°C.)M A X 5175/M A X 5177Low-Power, Serial, 12-Bit DACs with Force/Sense Voltage Output 6_______________________________________________________________________________________Typical Operating Characteristics(MAX5175: V DD = +5V, V REF = 2.5V; MAX5177: V DD = +3V, V REF = 1.25V; C L = 100pF, FB = OUT, code = FFF hex, T A = +25°C,unless otherwise noted.)2102402302202502602702802903003104.44.84.65.05.25.45.6NO-LOAD SUPPLY CURRENT vs. SUPPLY VOLTAGEM A X 5175-01SUPPLY VOLTAGE (V)N O -L O A D S U P P L Y C U R R E N T (µA )248252250258256254264262260266-50-1010-3030507090NO-LOAD SUPPLY CURRENTvs. TEMPERATUREM A X 5175-02TEMPERATURE (°C)N O -L O A D S U P P L Y C U R R E N T (µA )0.81.00.91.21.11.31.4-501030-30-10507090SHUTDOWN SUPPLY CURRENTvs. TEMPERATUREM A X 5175-03TEMPERATURE (°C)S H U T D O W N S U P P L Y C U R R E N T (µA )2.499302.499342.499382.499422.499462.49950-50-1010-3030507090OUTPUT VOLTAGE vs. TEMPERATUREM A X 5175-04TEMPERATURE (°C)O U T P U T V O L T A G E (V )V OUT (1V/div)V CS (5V/div)5V 2.5V10mV2µs/divDYNAMIC RESPONSEMAX5175-0710k100k00.51.01.52.02.53.0101001k OUTPUT VOLTAGE vs. LOAD RESISTANCEM A X 5175-05R L (Ω)O U T P U T V O L T A G E (V )V OUT (1V/div)V CS (5V/div)5V 2.5V10mV2µs/divDYNAMIC RESPONSEMAX5175-0610k100k-92-90-88-86-84-82-80-78101001k TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCYM A X 5175-08FREQUENCY (Hz)T H D + N O I S E (d B )V OUT /V REF (12.5dB/div)2010kREFERENCE FEEDTHROUGHFREQUENCY (Hz)V REF = 1.8V DC + 3.6Vp-p at f = 1kHzMAX5175MAX5175/MAX5177Low-Power, Serial, 12-Bit DACs withForce/Sense Voltage Output_______________________________________________________________________________________7V OUT /V REF (12.5dB/div)20100kFFT PLOTFREQUENCY (Hz)V REF = 2.5 V DC+ 1.414Vp-p at f = 10kHzV OUT(100mV/div)V CS (2V/div)MAJOR-CARRY TRANSITIONMAX5175-11V/SCLK (5V/div)400ns/divV OUT (2mV/div)DIGITAL FEEDTHROUGHMAX5175-12AC-COUPLED-25-20-10-15-510005001500200025003000REFERENCE INPUT FREQUENCY RESPONSEFREQUENCY (kHz)G A I N (d B )252256254260258266264262268-50-10-301030507090NO-LOAD SUPPLY CURRENTvs. TEMPERATUREM A X 5175-16TEMPERATURE (°C)N O -L O A D S U P P L Y C U R R E N T (µA )V OUT (10mV/div)V DD (1V/div)50ms/divSTART-UP GLITCHMAX5175-14AC-COUPLED2302402352502452602552652752702802.5 2.7 2.8 2.92.6 3.0 3.1 3.2 3.43.3 3.5NO-LOAD SUPPLY CURRENT vs. SUPPLY VOLTAGEM A X 5175-15SUPPLY VOLTAGE (V)N O -L O A D S U P P L Y C U R R E N T (µA )0.440.480.460.520.500.580.560.540.60-50-10-301030507090SHUTDOWN SUPPLY CURRENTvs. TEMPERATUREM A X 5175-17TEMPERATURE (°C)S H U T D O W N S U P P L Y C U R R E N T (µA )Typical Operating Characteristics (continued)(MAX5175: V DD = +5V, V REF = 2.5V; MAX5177: V DD = +3V, V REF = 1.25V; C L = 100pF, FB = OUT, code = FFF hex, T A = +25°C,unless otherwise noted.)MAX5175MAX5177M A X 5175/M A X 5177Low-Power, Serial, 12-Bit DACs with Force/Sense Voltage Output 8_______________________________________________________________________________________Typical Operating Characteristics (continued)(MAX5175: V DD = +5V, V REF = 2.5V; MAX5177: V DD = +3V, V REF = 1.25V; C L = 100pF, FB = OUT, code = FFF hex, T A = +25°C,unless otherwise noted.)10k100k0.20.40.80.61.01.21.4101001k OUTPUT VOLTAGE vs. RESISTANCE LOADM A X 5175-19R L (Ω)O U T P U T V O L T A G E (V )V OUT(500mV/div)V CS (3V/div)3V 1.25V10mV2µs/divDYNAMIC RESPONSEMAX5175-20V OUT(500mV/div)V CS (3V/div)3V 1.25V10mV2µs/div DYNAMIC RESPONSEMAX5175-2110k100k-88-84-86-82-78-80-74-76-72101001k TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCYM A X 5175-22FREQUENCY (Hz)T H D + N O I S E (d B )V OUT /V REF (12.5dB/div)2010kREFERENCE FEEDTHROUGHFREQUENCY (Hz)V REF = 0.8V DC+ 1.6Vp-p at f = 1kHzV OUT /V REF (12.5dB/div)20100kFFT PLOTFREQUENCY (Hz)V REF = 1.5V DC + 0.848V p-p at f = 10kHzOUT (500µV/div)2µs/divSCLK (2V/div)DIGITAL FEEDTHROUGH (SCLK, OUT)M A X 5175/77 t o c 26AC-COUPLEDMAX51771.249301.249401.249501.249601.249701.24980-50-1010-3030507090OUTPUT VOLTAGE vs. TEMPERATUREM A X 5175-18TEMPERATURE (°C)O U T P U T V O L T A G E (V )V OUT(100mV/div)5µs/divMAJOR-CARRY TRANSITIONM A X 5175/77 t o c 25V CS (2V/div)AC-COUPLEDMAX5175/MAX5177Low-Power, Serial, 12-Bit DACs withForce/Sense Voltage Output_______________________________________________________________________________________9Pin DescriptionTypical Operating Characteristics (continued)(MAX5175: V DD = +5V, V REF = 2.5V; MAX5177: V DD = +3V, V REF = 1.25V; C L = 100pF, FB = OUT, code = FFF hex, T A = +25°C,unless otherwise noted.)V OUT (10mV/div)AC-COUPLEDV DD (1V/div)50ms/divSTART-UP GLITCHMAX5175-28-25-20-10-15-510005001500200025003000REFERENCE INPUT FREQUENCY RESPONSEFREQUENCY (kHz)G A I N (d B )MAX5177M A X 5175/M A X 5177Low-Power, Serial, 12-Bit DACs with Force/Sense Voltage Output 10______________________________________________________________________________________Detailed DescriptionThe MAX5175/MAX5177 12-bit, serial, voltage-output DACs operate with a 3-wire serial interface. These devices include a 16-bit shift register and a double-buffered input composed of an input register and a DAC register (see Functional Diagram ). In addition, the negative terminal of the output amplifier is available.The DACs are designed with an inverted R-2R ladder network (Figure 1) that produces a weighted voltage proportional to the reference voltage.Reference InputsThe reference input accepts both AC and DC values with a voltage range extending from 0 to V DD - 1.4V. The fol-lowing equation represents the resulting output voltage:where N is the numeric value of the DAC’s binary inputcode (0 to 4095), V REF is the reference voltage, and Gain is the externally set voltage gain. The maximum output voltage is V DD . The reference pin has a mini-mum impedance of 18k Ωand is code dependent.Output AmplifierThe MAX5175/MAX5177’s DAC output is internally buffered by a precision amplifier with a typical slew rate of 0.6V/µs. Access to the output amplifier’s inverting input provides flexibility in output gain setting and sig-nal conditioning (see Applications Information ).The output amplifier settles to ±0.5LSB from a full-scale transition within 12µs, when loaded with 5k Ωin parallel with 100pF. Loads less than 2k Ωdegrade perfor-mance.Shutdown ModeThe MAX5175/MAX5177 feature a software- and hard-ware-programmable shutdown mode that reduces the typical supply current to 1µA. Enter shutdown by writing the appropriate input-control word as shown in Table 1or by using the hardware shutdown function. In shut-down mode, the reference input and the amplifier out-put become high impedance and the serial interface remains active. Data in the input register is saved,allowing the MAX5175/MAX5177 to recall the prior out-put state when returning to normal operation. Exit shut-down by reloading the DAC register from the shift register, by simultaneously loading the input and DAC registers, or by toggling PDL . When returning from shutdown, wait 40µs for the output to settle.Power-Down LockoutPower-down lockout disables the software/hardware shutdown mode. A high-to-low transition on PDL brings the device out of shutdown, returning the output to its previous state.ShutdownPulling SHDN high while PDL is high places the MAX5175/MAX5177 in shutdown. Pulling SHDN low does not take the device out of shutdown. A high-to-low transi-tion on PDL or an appropriate command from the serial data line (see Table 1 for commands) is required to exit shutdown.Serial InterfaceThe 3-wire serial interface is compatible with SPI, QSPI (Figure 2), and MICROWIRE (Figure 3) interface stan-dards. The 16-bit serial input word consists of two con-trol bits, 12 bits of data (MSB to LSB), and two sub-bits.The control bits determine the MAX5175/MAX5177’s response as outlined in Table 1. The digital inputs are double buffered, which allows any of the following:•Loading the input register without updating the DAC register •Updating the DAC register from the input register •Updating the input and DAC registers simultaneously.Figure 1. Simplified DAC Circuit DiagramMAX5175/MAX5177Low-Power, Serial, 12-Bit DACs withForce/Sense Voltage Output______________________________________________________________________________________11The MAX5175/MAX5177 accept one 16-bit packet or two 8-bit packets sent while CS remains low. The devices allow the following to be configured:•Clock edge on which serial data output (DOUT) is clocked out•State of the user-programmable logic output •Reset state.Specific commands for setting these are shown in Table 1.The general timing diagram in Figure 4 illustrates how the MAX5175/MAX5177 acquire data. CS must go low at least t CSS before the rising edge of the serial clock (SCLK). With CS low, data is clocked into the register on the rising edge of SCLK. The maximum serial clock frequency guaranteed for proper operation is 10MHz for the MAX5175 and 6MHz for the MAX5177. See Figure 5 for a detailed timing diagram of the serial inter-face.Table 1. Serial-Interface Programming CommandsFigure 2. Connections for SPI/QSPI Standards Figure 3. Connections for MICROWIREM A X 5175/M A X 5177Low-Power, Serial, 12-Bit DACs with Force/Sense Voltage Output 12______________________________________________________________________________________Serial-Data Output (DOUT)The serial-data output (DOUT) is the internal shift regis-ter’s output and allows for daisy-chaining of multiple devices as well as data readback (see Applications Information ). By default upon start-up, data shifts out of DOUT on the serial clock’s rising edge (Mode 0) and provides a lag of 16 clock cycles, thus maintaining SPI,QSPI, and MICROWIRE compatibility. However, if the device is programmed for Mode 1, then the output data lags DIN by 16.5 clock cycles and is clocked out on the serial clock’s rising edge. During shutdown, DOUT retains its last digital state prior to shutdown.User-Programmable Logic Output (UPO)The UPO allows control of an external device through the serial interface, thereby reducing the number of microcontroller I/O pins required. During power-down,this output will retain its digital state prior to shutdown.When CLR is pulled low, UPO will reset to its pro-grammed default state. See Table 1 for specific com-mands to control the UPO.Reset (RS) and Clear (C L R )The MAX5175/MAX5177 offers a clear pin (CLR ) which resets the output voltage. If RST = DGND, then CLR resets the output voltage to the minimum voltage (0 if no offset is introduced). If RST = V DD , then CLR resets the output voltage to midscale. In either case, CLR will reset UPO to its programmed default state.Figure 4. Serial-Interface Timing DiagramFigure 5. Detailed Serial-Interface Timing DiagramApplications InformationUnipolar OutputFigure 6 shows the MAX5175/MAX5177 configured for unipolar, rail-to-rail operation with a gain of +2V/V.Table 2 lists the codes for unipolar output voltages. The output voltage is limited to V DD .Bipolar OutputFigure 7 shows the MAX5175/MAX5177 configured for bipolar output operation. The output voltage is given by the following equation (FB = OUT):where N represents the numeric value of the DAC’s binary input code and V REF is the voltage of the exter-nal reference. Table 3 shows digital codes and the cor-responding output voltage for Figure 7’s circuit.Daisy-Chaining DevicesThe serial data output pin (DOUT) allows multiple MAX5175/MAX5177s to be daisy-chained together as shown in Figure 8. The advantage of this is that only two lines are needed to control all of the DACs on the line. The disadvantage is that it takes n commands to program the DACs. Figure 9 shows several MAX5175/MAX5177s sharing one common DIN signal line. In this configuration the data bus is common to all devices;however, more I/O lines are required because each device needs a dedicated CS line. The advantage of this configuration is that only one command is neededto program any DAC.MAX5175/MAX5177Low-Power, Serial, 12-Bit DACs withForce/Sense Voltage Output______________________________________________________________________________________13Table 2. Unipolar Code Table (Circuit of Figure 6)Figure 6. Unipolar Output Circuit (Rail-to-Rail)Figure 7. Bipolar Output CircuitM A X 5175/M A X 5177Low-Power, Serial, 12-Bit DACs with Force/Sense Voltage Output 14______________________________________________________________________________________Figure 8. Daisy-Chaining MAX5175/MAX5177sFigure 9. Multiple MAX5175/MAX5177s Sharing Common DIN and SCLK LinesMAX5175/MAX5177Low-Power, Serial, 12-Bit DACs withForce/Sense Voltage Output______________________________________________________________________________________15Using an AC ReferenceThe MAX5175/MAX5177 accept reference voltages containing AC components, as long as the reference voltage remains between 0 and V DD - 1.4V. Figure 10shows a technique for applying a sine-wave signal to REF. The reference voltage must remain above AGND.Digitally ProgrammableCurrent SourceThe circuit of Figure 11 places an NPN transistor (2N3904 or similar) within the op amp feedback loop to implement a digitally programmable, unidirectional cur-rent source. The output current is calculated with the following equation:where N is the numeric value of the DAC’s binary inputcode and R is the sense resistor shown in Figure 11.Power-Supply and Layout ConsiderationsWire-wrap boards are not recommended. For optimum system performance, use printed circuit boards with separate analog and digital ground planes. Connect the two ground planes together at the low-impedancepower-supply source. Connect DGND and AGND pins together at the IC. The best ground connection is achieved by connecting the DAC’s DGND and AGND pins together and connecting that point to the system analog ground plane. If the DAC’s DGND is connected to the system digital ground, digital noise may infiltrate the DAC’s analog portion.Bypass the power supply with a 4.7µF capacitor in par-allel with a 0.1µF capacitor to AGND. Minimize capaci-tor lead lengths to reduce inductance. If noise becomes an issue, use shielding and/or ferrite beads to increase isolation.In order to maintain INL and DNL performance, as well as gain drift, it is extremely important to provide the lowest possible reference output impedance at the DAC reference input pin. INL degrades if the series resistance on the REF pin exceeds 0.1Ω. The same consideration must be made for the AGND pin.Figure 10. AC Reference Input CircuitFigure 11. Digitally Programmable Current SourceM A X 5175/M A X 5177Low-Power, Serial, 12-Bit DACs with Force/Sense Voltage Output implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are 16____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600©1999 Maxim Integrated ProductsPrinted USAis a registered trademark of Maxim Integrated Products.Package InformationFunctional DiagramChip InformationTRANSISTOR COUNT: 3457。