MAX5877EGK-TD中文资料

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MAX485中文资料

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_______________________________概述MAX481、MAX483、MAX485、MAX487-MAX491以及MAX1487是用于RS-485与RS-422通信的低功耗收发器，每个器件中都具有一个驱动器和一个接收器。

MAX483、MAX487、MAX488以及MAX489具有限摆率驱动器，可以减小EMI ，并降低由不恰当的终端匹配电缆引起的反射，实现最高250k b p s 的无差错数据传输。

M A X 481、MAX485、MAX490、MAX491、MAX1487的驱动器摆率不受限制，可以实现最高2.5Mbps 的传输速率。

这些收发器在驱动器禁用的空载或满载状态下，吸取的电源电流在120(A 至500(A 之间。

另外，MAX481、MAX483与MAX487具有低电流关断模式，仅消耗0.1µA 。

所有器件都工作在5V 单电源下。

驱动器具有短路电流限制，并可以通过热关断电路将驱动器输出置为高阻状态，防止过度的功率损耗。

接收器输入具有失效保护特性，当输入开路时，可以确保逻辑高电平输出。

MAX487与MAX1487具有四分之一单位负载的接收器输入阻抗，使得总线上最多可以有128个M A X 487/MAX1487收发器。

使用MAX488-MAX491可以实现全双工通信，而MAX481、MAX483、MAX485、MAX487与MAX1487则为半双工应用设计。

_______________________________应用低功耗RS-485收发器低功耗RS-422收发器电平转换器用于EMI 敏感应用的收发器工业控制局域网____________________下一代器件的特性♦容错应用MAX3430: ±80V 故障保护、失效保护、1/4单位负载、+3.3V 、RS-485收发器MAX3440E-MAX3444E: ±15kV ESD 保护、±60V 故障保护、10Mbps 、失效保护、RS-485/J1708收发器♦对于空间受限应用MAX3460-MAX3464: +5V 、失效保护、20Mbps 、Profibus RS-485/RS-422收发器MAX3362: +3.3V 、高速、RS-485/RS-422收发器，采用SOT23封装MAX3280E-MAX3284E: ±15kV ESD 保护、52Mbps 、+3V 至+5.5V 、SOT23、RS-485/RS-422、真失效保护接收器MAX3293/MAX3294/MAX3295: 20Mbps 、+3.3V 、SOT23、RS-485/RS-422发送器♦对于多通道收发器应用MAX3030E-MAX3033E: ±15kV ESD 保护、+3.3V 、四路RS-422发送器♦对于失效保护应用MAX3080-MAX3089: 失效保护、高速(10Mbps)、限摆率RS-485/RS-422收发器♦对于低电压应用MAX3483E/MAX3485E/MAX3486E/MAX3488E/MAX3490E/MAX3491E: +3.3V 供电、±15kV ESD 保护、12Mbps 、限摆率、真正的RS-485/RS-422收发器MAX481/MAX483/MAX485/MAX487–MAX491/MAX1487低功耗、限摆率、RS-485/RS-422收发器_____________________________________________________________________选择表19-0122; Rev 8; 10/03定购信息在本资料的最后给出。

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。

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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。

高精度10V参考电源AD587说明书

FUNCTIONAL BLOCK DIAGRAMREV.CInformation furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.aHigh Precision 10 V ReferenceAD587One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.Tel: 617/329-4700Fax: 617/326-8703FEATURESLaser Trimmed to High Accuracy:10.000 V ؎5 mV (L and U Grades)Trimmed Temperature Coefficient:5 ppm/؇C max, (L and U Grades)Noise Reduction CapabilityLow Quiescent Current: 4 mA max Output Trim CapabilityMIL-STD-883 Compliant Versions AvailablePRODUCT HIGHLIGHTSser trimming of both initial accuracy and temperature coefficients results in very low errors over temperature with-out the use of external components. The AD587L has amaximum deviation from 10.000 V of ±8.5 mV between 0°C and +70°C, and the AD587U guarantees ±14 mV maximum total error between –55°C and +125°C.2.For applications requiring higher precision, an optional fine trim connection is provided.3.Any system using an industry standard pinout 10 volt refer-ence can be upgraded instantly with the AD587.4.Output noise of the AD587 is very low, typically 4 µV p-p. A noise reduction pin is provided for additional noise filtering using an external capacitor.5.The AD587 is available in versions compliant with MIL-STD-883. Refer to the Analog Devices Military Products Databook or current AD587/883B data sheet for detailed specifications.PRODUCT DESCRIPTION The AD587 represents a major advance in the state-of-the-art in monolithic voltage references. Using a proprietary ion-implanted buried Zener diode and laser wafer trimming of high stability thin-film resistors, the AD587 provides outstanding perfor-mance at low cost.The AD587 offers much higher performance than most other 10 V references. Because the AD587 uses an industry standard pinout, many systems can be upgraded instantly with the AD587. The buried Zener approach to reference design pro-vides lower noise and drift than bandgap voltage references. The AD587 offers a noise reduction pin which can be used to further reduce the noise level generated by the buried Zener.The AD587 is recommended for use as a reference for 8-, 10-,12-, 14- or 16-bit D/A converters which require an external precision reference. The device is also ideal for successiveapproximation or integrating A/D converters with up to 14 bits of accuracy and, in general, can offer better performance than the standard on-chip references.The AD587J, K and L are specified for operation from 0°C to +70°C, and the AD587S, T and U are specified for –55°C to +125°C operation. All grades are available in 8-pin cerdip. The J and K versions are also available in an 8-pin Small Outline IC (SOIC) package for surface mount applications, while the J, K and L grades also come in an 8-pin plastic package.NOISE V OUTTRIMGNDNOTE:PINS 1,3 AND 7 ARE INTERNAL TEST POINTS.NO CONNECTIONS TO THESE POINTS.AD587–SPECIFICATIONS(T A = +25؇C, V IN = +15 V unless otherwise noted)Model AD587J/S AD587K/T AD587L/UMin Typ Max Min Typ Max Min Typ Max Units OUTPUT VOLTAGE9.99010.0109.99510.0059.99510.005VOUTPUT VOLTAGE DRIFT10°C to +70°C20105ppm/°C –55°C to +125°C20105GAIN ADJUSTMENT+3+3+3%–1–1–1LINE REGULATION113.5 V ≤ + V IN≤ 36 VT MIN to T MAX100100100±µV/VLOAD REGULATION1Sourcing 0 < I OUT < 10 mAT MIN to T MAX100100100±µV/mA Sourcing –10 < I OUT < 0 mA2T MIN to T MAX100100100QUIESCENT CURRENT242424mAPOWER DISSIPATION303030mWOUTPUT NOISE0.1 Hz to 10 Hz444µV p-pSpectral Density, 100 Hz100100100nV/√HzLONG-TERM STABILITY151515±ppm/1000 Hr. SHORT-CIRCUIT CURRENT-TO-GROUND305030503050mASHORT-CIRCUIT CURRENT-TO-V IN305030503050mA TEMPERATURE RANGESpecified Performance (J, K, L)0+700+700+70°COperating Performance (J, K, L)3–40+85–40+85–40+85Specified Performance (S, T, U)–55+125–55+125–55+125Operating Performance (S, T, U)3–55+125–55+125–55+125NOTES1Spec is guaranteed for all packages and grades. Cerdip packaged parts are 100% production test.2Load Regulation (Sinking) specification for SOIC (R) package is ±200 µV/mA.3The operating temperature ranged is defined as the temperatures extremes at which the device will still function. Parts may deviate from their specified performance outside their specified temperature range.Specifications subject to change without notice.ORDERING GUIDEInitial Temperature Temperature PackageModel1Error Coefficient Range Options2AD587JQ10 mV20 ppm/°C0°C to +70°C Q-8AD587JR10 mV20 ppm/°C0°C to +70°C SO-8AD587JN10 mV20 ppm/°C0°C to +70°C N-8AD587KQ 5 mV10 ppm/°C0°C to +70°C Q-8AD587KR 5 mV10 ppm/°C0°C to +70°C SO-8AD587KN 5 mV10 ppm/°C0°C to +70°C N-8AD587LQ 5 mV 5 ppm/°C0°C to +70°C Q-8AD587LN 5 mV 5 ppm/°C0°C to +70°C N-8AD587SQ10 mV20 ppm/°C–55°C to +125°C Q-8AD587TQ10 mV10 ppm/°C–55°C to +125°C Q-8AD587UQ 5 mV 5 ppm/°C–55°C to +125°C Q-8AD587JCHIPS10 mV20 ppm/°C0°C to +70°CNOTES1For details on grade and package offerings screened in accordance with MIL-STD-883, refer to theAnalog Devices Military Products Databook or current AD587/883B data sheet.2N = Plastic DIP; Q = Cerdip; SO = SOIC.–2–REV. CAD587REV. C –3–ABSOLUTE MAXIMUM RATINGS*V IN to Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36 V Power Dissipation (+25°C) . . . . . . . . . . . . . . . . . . . . .500 mW Storage Temperature . . . . . . . . . . . . . . . . . . .–65°C to +150°C Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . . .+300°C Package Thermal ResistanceθJC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22°C/W θJA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .110°C/W Output Protection: Output safe for indefinite short to ground and momentary short to V IN .*Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.DIE SPECIFICATIONSThe following specifications are tested at the die level for AD587JCHIPS. These die are probed at +25°C only.(T A = +25°C, V IN = +15 V unless otherwise noted)AD587JCHIPS Parameter Min Typ Max UnitsOutput Voltage 9.99010.010V Gain Adjustment –13%Line Regulation13.5 V < + V IN < 36 V 100±µV/V Load RegulationSourcing 0 < I OUT < 10 mA 100µV/mA Sinking –10 < I OUT < 0 mA 100µV/mA Quiescent Current24mA Short-Circuit Current-to-Ground 50mA Short-Circuit Currrent-to-V OUT50mANOTES 1Both V OUT pads should be connected to the output.2Sense and force grounds must be tied together.Die Thickness:The standard thickness of Analog Devices Bipolar dice is 24 mils ± 2 mils.Die Dimensions: The dimensions given have a tolerance of ±2 mils.Backing : The standard backside surface is silicon (not plated). Analog Devices does not recommend gold-backed dice for most applications.Edges: A diamond saw is used to separate wafers into dice thus providing perpendicular edges half-way through the die.In contrast to scribed dice, this technique provides a more uniform die shape and size . The perpen-dicular edges facilitate handling (such as tweezer pick-up) while the uniform shape and size simplifies substrate design and die attach.Top Surface: The standard top surface of the die is covered by a layer of glassivation . All areas are covered except bonding pads and scribe lines.Surface Metalization: The metalization to Analog Devices bipolar dice is aluminum. Minimum thickness is 10,000Å.Bonding Pads: All bonding pads have a minimum size of 4 mils by 4 mils. The passivation windows have 3.5 mils by 3.5 mils minimum.DIE LAYOUTPIN CONFIGURATIONTP *TRIMV OUTTP *NOISEREDUCTION+V IN TP *GND *TP DENOTES FACTORY TEST POINT. NO CONNECTIONS SHOULD BE MADE TO THESE PINS.Die Size: 0.081 × 0.060 InchesAD587REV. C–4–THEORY OF OPERATIONThe AD587 consists of a proprietary buried Zener diode refer-ence, an amplifier to buffer the output and several high stability thin-film resistors as shown in the block diagram in Figure 1.This design results in a high precision monolithic 10 V output reference with initial offset of 5 mV or less. The temperature compensation circuitry provides the device with a temperature coefficient of under 5 ppm/°C.NOISE V OUTTRIM GNDNOTE:PINS 1,3 AND 7 ARE INTERNAL TEST POINTS.NO CONNECTIONS TO THESE POINTS.Figure 1.AD587 Functional Block Diagram A capacitor can be added at the NOISE REDUCTION pin (Pin 8) to form a low-pass filter with R S to reduce the noise contribu-tion of the Zener to the circuit.APPLYING THE AD587The AD587 is simple to use in virtually all precision reference applications. When power is applied to Pin 2, and Pin 4 is grounded, Pin 6 provides a 10 V output. No external compo-nents are required; the degree of desired absolute accuracy is achieved simply by selecting the required device grade. The AD587 requires less than 4 mA quiescent current from an oper-ating supply of +15 V.Fine trimming may be desired to set the output level to exactly 10.000 V (calibrated to a main system reference). System cali-bration may also require a reference voltage that is slightly differ-ent from 10.000 V, for example, 10.24 V for binary applications.In either case, the optional trim circuit shown in Figure 2 can offset the output by as much as 300 mV, if desired, with mini-mal effect on other device characteristics.OUTPUTC Figure 2.Optional Fine Trim ConfigurationNOISE PERFORMANCE AND REDUCTIONThe noise generated by the AD587 is typically less than 4 µV p-p over the 0.1 Hz to 10 Hz band. Noise in a 1 MHz band-width is approximately 200 µV p-p. The dominant source of this noise is the buried Zener which contributes approximately 100 nV/√Hz . In comparison, the op amp’s contribution is negli-gible. Figure 3 shows the 0.1 Hz to 10 Hz noise of a typical AD587. The noise measurement is made with a bandpass filter made of a 1-pole high-pass filter with a corner frequency at 0.1 Hz and a 2-pole low-pass filter with a corner frequency at 12.6 Hz to create a filter with a 9.922 Hz bandwidth.Figure 3.0.1 Hz to 10 Hz NoiseIf further noise reduction is desired, an external capacitor may be added between the NOISE REDUCTION pin and ground as shown in Figure 2. This capacitor, combined with the 4 k Ω R S and the Zener resistances, form a low-pass filter on the output of the Zener cell. A 1 µF capacitor will have a 3 dB point at 40 Hz, and it will reduce the high frequency (to 1 MHz) noise to about 160 µV p-p. Figure 4 shows the 1 MHz noise of a typi-cal AD587 both with and without a 1 µF capacitor.Figure 4.Effect of 1 µF Noise Reduction Capacitor on Broadband Noise TURN-ON TIMEUpon application of power (cold start), the time required for the output voltage to reach its final value within a specified error band is defined as the turn-on settling time. Two components normally associated with this are: the time for the active circuits to settle, and the time for the thermal gradients on the chip to stabilize. Figure 5 shows the turn-on characteristics of theAD587. It shows the settling to be about 60 µs to 0.01%. Note the absence of any thermal tails when the horizontal scale is ex-panded to 1 ms/cm in Figure 5b.AD587REV. C–5–DYNAMIC PERFORMANCEThe output buffer amplifier is designed to provide the AD587 with static and dynamic load regulation superior to less com-plete references.Many A/D and D/A converters present transient current loads to the reference, and poor reference response can degrade the converter’s performance.Figure 6 displays the characteristics of the AD587 output ampli-fier driving a 0 mA to 10 mA load.Output turn-on time is modified when an external noise reduc-tion capacitor is used. When present, this capacitor acts as an additional load to the internal Zener diode’s current source, re-sulting in a somewhat longer turn-on time. In the case of a 1 µF capacitor, the initial turn-on time is approximately 400 ms to 0.01% (see Figure 5c).a.Electrical Turn-Onb.Extended Time Scalec.Turn-On with 1 µF C N Figure 5.Turn-On CharacteristicsFigure 6a.Transient Load Test Circuit Figure rge-Scale Transient Response Figure 6c.Fine Scale Settling for Transient LoadOUTAD587REV. C–6–In some applications, a varying load may be both resistive and capacitive in nature, or the load may be connected to the AD587 by a long capacitive cable.Figure 7 displays the output amplifier characteristics driving a 1000 pF, 0 mA to 10 mA load.V OUTFigure 7a.Capacitive Load Transient /Response Test CircuitFigure 7b.Output Response with Capacitive Load LOAD REGULATIONThe AD587 has excellent load regulation characteristics. Figure 8 shows that varying the load several mA changes the output by only a few µV.Figure 8.Typical Load Regulation Characteristics TEMPERATURE PERFORMANCEThe AD587 is designed for precision reference applications where temperature performance is critical. Extensive tempera-ture testing ensures that the device’s high level of performance is maintained over the operating temperature range.Some confusion exists in the area of defining and specifying ref-erence voltage error over temperature. Historically, references have been characterized using a maximum deviation per degree Centrigrade; i.e., ppm/°C. However, because of nonlinearities in temperature characteristics which originated in standard Zener references (such as “S” type characteristics), most manufactur-ers have begun to use a maximum limit error band approach to specify devices. This technique involves the measurement of the output at three or more different temperatures to specify an out-put voltage error band.Figure 9 shows the typical output voltage drift for the AD587L and illustrates the test methodology. The box in Figure 9 is bounded on the sides by thc operating temperature extremes,and on the top and the bottom by the maximum and minimum output voltages measured over the operating temperature range.The slope of the diagonal drawn from the lower left to the upper right corner of the box determines the performance grade of the device.Figure 9.Typical AD587L Temperature DriftEach AD587J, K, L grade unit is tested at 0°C, +25°C and +70°C. Each AD587S, T, and U grade unit is tested at –55°C,+25°C and +125°C. This approach ensures that the variations of output voltage that occur as the temperature changes within the specified range will be contained within a box whose diago-nal has a slope equal to the maximum specified drift. The posi-tion of the box on the vertical scale will change from device to device as initial error and the shape of the curve vary. The maxi-mum height of the box for the appropriate temperature range and device grade is shown in Figure 10. Duplication of these results requires a combination of high accuracy and stable temperature control in a test system. Evaluation of the AD587will produce a curve similar to that in Figure 9, but output readings may vary depending on the test methods and equip-ment utilized.Figure 10.Maximum Output Change in mVAD587REV. C –7–NEGATIVE REFERENCE VOLTAGE FROM AN AD587The AD587 can be used to provide a precision –10.000 V output as shown in Figure 11. The V IN pin is tied to at least a +3.5 V supply, the output pin is grounded, and the AD587 ground pin is connected through a resistor, R S , to a –15 V supply. The –10 V output is now taken from the ground pin (Pin 4) instead of V OUT . It is essential to arrange the output load and the sup-ply resistor R S so that the net current through the AD587 is be-tween 2.5 mA and 10.0 mA. The temperature characteristics and long-term stability of the device will be essentially the same as that of a unit used in the standard +10 V output configuration.1nF–15V–10VL <10mASFigure 11.AD587 as a Negative 10 V Reference USING THE AD587 WITH CONVERTERSThe AD587 is an ideal reference for a wide variety of 8-, 12-,14- and 16-bit A/D and D/A converters. Several representative examples follow.10 V REFERENCE WITH MULTIPLYING CMOS D/A OR A/D CONVERTERSThe AD587 is ideal for applications with 10- and 12-bit multi-plying CMOS D/A converters. In the standard hookup, as shown in Figure 12, the AD587 is paired with the AD754512-bit multiplying DAC and the AD711 high-speed BiFET Op Amp. The amplifier DAC configuration produces a unipolar 0 V to –10 V output range. Bipolar output applications and other operating details can be found on the individual product data sheets.Figure 12.Low Power 12-Bit CMOS DAC ApplicationThe AD587 can also be used as a precision reference for mul-tiple DACs. Figure 13 shows the AD587, the AD7628 dual DAC and the AD712 dual op amp hooked up for single supply operation to produce 0 V to –10 V outputs. Because both DACsare on the same die and share a common reference and output op amps; the DAC outputs will exhibit similar gain TCs.Figure 13. AD587 as a 10 V Reference for a CMOS Dual DACPRECISION CURRENT SOURCEThe design of the AD587 allows it to be easily configured as a current source. By choosing the control resistor R C in Figure 14,you can vary the load current from the quiescent current (2 mA typically) to approximately 10 mA.+V I L = + I BIAS10VR CFigure 14. Precision Current SourceAD587REV. C –8–P R I N T E D I N U . S . A . C 1 1 3 6 a –1 5–1 0 / 8 8PRECISION HIGH CURRENT SUPPLYFor higher currents, the AD587 can easily be connected to a power PNP or power Darlington PNP device. The circuit in Figure 15 can deliver up to 4 amps to the load. The 0.1 µF capacitor is required only if the load has a significant capacitive component. If the load is purely resistive, improved high fre-quency supply rejection results can be obtained by removing thecapacitor.Figure 15a. Precision High-Current Current Source Figure 15b.Precision High-Current Voltage SourceCerdip (Q-8) PackageMini-DIP (N-8) Package Small Outline (R-8) PackageOUTLINE DIMENSIONSDimensions shown in inches and (mm).。

超米特电子有限公司产品说明书

1US Headquarters TEL +(1) 781-935-4850FAX +(1) 781-933-4318 • Europe TEL +(44) 1628 404000FAX +(44) 1628 404090Asia Pacific TEL +(852) 2 428 8008FAX +(852) 2 423 8253South America TEL +(55) 11 3917 1099FAX +(55) 11 3917 0817Superior elongation and tensilestrength help to prevent tearing in use due to mishandling. Typical properties for CHO-SEAL 1310 and 1273 materi-al are shown on pages 33 and 32respectively.High Shielding PerformanceCHO-SEAL 1310 material provides more than 80 dB of shielding effectiv-ness from 100 MHz to 10 GHz, while CHO-SEAL 1273 material provides more than 100 dB.Low Volume ResistivityBoth materials have exceptionally low volume resistivity, which makes them well suited for grounding appli-cations in which a flexible electrical contact is needed.Low Compression GasketSpacer gaskets are typicallydesigned to function under low deflec-tion forces. Chomerics uses design tools such as Finite Element Analysis (FEA) to accurately predict compres-sion-deflection behavior of various cross section options. Refer to page16.LCP Plastic SpacerLiquid crystal polymer (LCP)spacers, including those made with Vectra A130 material, provide aCHO-SEAL ®1310 or 1273Conductive ElastomersWith EMI spacer gaskets, shielding and grounding are provided by Chomerics’CHO-SEAL 1310 and 1273 conductive elastomers, specifi-cally formulated for custom shape molded parts. They provide excellent shielding and isolation against electro-magnetic interference (EMI), or act as a low impedance ground path between PCB traces and shielding media. Physically tough, these elas-tomers minimize the risk of gasket damage, in contrast to thin-walled extrusions or unsupported molded gaskets.Silicone-based CHO-SEAL 1310and 1273 materials offer excellent resistance to compression set over a wide temperature range, resulting in years of continuous service. CHO-SEAL 1310 material is filled with silver-plated-glass particles, while 1273 utilizes silver-plated-copper filler to provide higher levels of EMI shielding effectiveness.EMI Spacer GasketsThe unique design of Chomerics’EMI spacer gaskets features a thin plastic retainer frame onto which a conductive elastomer is molded. The elastomer can be located inside or outside the retainer frame, as well as on its top and bottom surface. EMI spacer gaskets provide a newapproach to designing EMI gaskets into handheld electronics such as dig-ital cellular phones. Board-to-board spacing is custom designed to fit broad application needs. Customized cross sections and spacer shapes allow for very low closure forcerequirements and a perfect fit in any design or device.Robotic InstallationSpacer gaskets can be installed quickly by robotic application. Integral locater pins in the plastic spacer help ensure accuratepositioning in both manual and pick-and-place assembly. Benefits include faster assembly and lower labor costs.The integrated conductive elastomer/plastic spacer gasket is a low cost,easily installed system for providing EMI shielding and grounding in small electronic enclosures.Figure 1Single Piece EMI Gasket/Locator PinsCHO-SEAL 1310 or 1273 Conductive Elastomer (Inside)Plastic Spacer Around Outsideor InsideApplications for EMI Spacer GasketsThe spacer gasket concept is especially suited to digital and dual board telephone handsets or other handheld electronic devices. It provides a low impedance path between peripheral ground traces on printed circuit boards and components such as:•the conductive coating on a plastic housing•another printed circuit board •the keypad assemblyTypical applications for EMI spacer gaskets include:•Digital cellular, handyphone and personal communications services (PCS) handsets •PCMCIA cards•Global Positioning Systems (GPS)•Radio receivers•Other handheld electronics, e.g.,personal digital assistants (PDAs)•Replacements for metal EMI shield-ing “fences” on printedcircuit boards in wireless tele-communications devicesstable platform for direct, highprecision molding of conductive elas-tomers. The Vectra A130 material described in Table 1 has excellent heat deflection temperature character-istics (489°F, 254°C). For weight con-siderations, the LCP has aspecific gravity of only 1.61. This plas-tic is also 100% recyclable.Typical EMI Spacer Gasket Design ParametersThe EMI spacer gasket concept can be considered using the design parameters shown in Table 2. Some typical spacer gasket profiles are shown below.Figure 2Typical Spacer Gasket Profiles3US Headquarters TEL +(1) 781-935-4850FAX +(1) 781-933-4318 • Europe TEL +(44) 1628 404000FAX +(44) 1628 404090Asia Pacific TEL +(852) 2 428 8008FAX +(852) 2 423 8253South America TEL +(55) 11 3917 1099FAX +(55) 11 3917 0817Finite Element AnalysisChomerics, a division of the Parker Hannifin Corporation’s Seal Group, is the headquarters of Parker Seal’s Elastomer Simulation Group. This unit specializes in elastomer finite element analysis (FEA) using MARC K6 series software as a foundation for FEA capability.Benefits of FEA include:•Quickly optimizing elastomer gasket designs•Allowing accurate predictions of alternate elastomer design concepts •Eliminating extensive trial and error prototype evaluationTypical use of FEA in EMI spacer gasket designs is to evaluate the force vs. deflection requirements of alternate designs.For example, onespacer design features a continuous bead of con-ductive elastomer molded onto a plastic spacer. An alternative designemploys an “interrupted bead,” where the interrup-tions (gaps left on the plastic frame) are sized to maintain the requiredlevel of EMI shielding. Figure 4illustrates these alternative designs.Gasket DeflectionFigure 5 compares the effect of continuous and interrupted elastomer gasket designs in terms of the force required to deflect the conductive elastomer. This actual cellular handset application required a spacer gasket with interrupted bead to meet desired deflection forces.Chomerics Designand Application ServicesChomerics will custom design a spacer for your application. Advice,analysis and design assistance will be provided by Chomerics Applications and Design engineers at no additional fee. Contact Chomerics directlyat the locations listed at the bottom of the page.Figure 3FEA Example of an EMISpacer Gasket Cross SectionFigure 4Continuous (top) and InterruptedElastomer GasketsFigure 5Typical Spacer Gasket Deflection。

关于MAX6675的说明书

General DescriptionThe MAX6675 performs cold-junction compensation and digitizes the signal from a type-K thermocouple. The data is output in a 12-bit resolution, SPI-compatible, read-only format.This converter resolves temperatures to 0.25°C, allows readings as high as +1024°C, and exhibits thermocouple accuracy of 8 LSBs for temperatures ranging from 0°C to +700°C.The MAX6675 is available in a small, 8-pin SO package.Applications●Industrial ●Appliances ●HVACFeatures●Direct Digital Conversion of Type -K ThermocoupleOutput ●Cold-Junction Compensation●Simple SPI-Compatible Serial Interface ●12-Bit, 0.25°C Resolution ●Open Thermocouple DetectionPART TEMP RANGE PIN-PACKAGE MAX6675ISA-20°C to +85°C8 SOMAX6675Cold-Junction-Compensated K-Thermocouple-to-Digital Converter (0°C to +1024°C)19-2235; Rev 3; 6/21Ordering InformationEVALUATION KIT AVAILABLEClick here to ask about the production status of specific part numbers.Supply Voltage (V CC to GND) ............................... -0.3V to +6V SO, SCK, CS , T-, T+ to GND .....................-0.3V to V CC + 0.3V SO Current ....................................................................... 50mA ESD Protection (Human Body Model) .......................... ±2000V Continuous Power Dissipation (T A = +70°C)8-Pin SO (derate 5.88mW/°C above +70°C) ............. 471mW Operating Temperature Range ..........................-20°C to +85°CStorage Temperature Range ...........................-65°C to +150°C Junction Temperature .................................................... +150°C SO PackageVapor Phase (60s) . .....................................................+215°C Infrared (15s) ..............................................................+220°C Lead Temperature (soldering, 10s) ............................... +300°C(V CC = +3.0V to +5.5V, T A = -20°C to +85°C, unless otherwise noted. Typical values specified at +25°C.) (Note 1)PARAMETERSYMBOLCONDITIONSMINTYP MAX UNITSTemperature ErrorT THERMOCOUPLE = +700°C,T A = +25°C (Note 2)V CC = +3.3V -5+5LSBV CC = +5V -6+6T THERMOCOUPLE = 0°C to +700°C, T A = +25°C (Note 2)V CC = +3.3V -8+8V CC = +5V -9+9T THERMOCOUPLE = +700°Cto +1000°C, T A = +25°C (Note 2)V CC = +3.3V -17+17V CC = +5V-19+19Thermocouple Conversion Constant10.25µV/LSB Cold-JunctionCompensation Error T A = -20°C t o +85°C (Note 2)V CC = +3.3V -3.0+3.0°C V CC= +5V-3.0+3.0Resolution0.25°C Thermocouple Input Impedance 60k W Supply Voltage V CC 3.05.5V Supply CurrentI CC0.7 1.5mA Power-On Reset Threshold V CC rising12 2.5V Power-On Reset Hysteresis 50mV Conversion Time (Note 2)0.170.22sSERIAL INTERFACE Input Low Voltage V IL 0.3 x V CCV Input High Voltage V IH 0.7 x V CCV Input Leakage Current I LEAK V IN = GND or V CC±5µA Input CapacitanceC IN5pFto-Digital Converter (0°C to +1024°C)Electrical 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.Absolute Maximum RatingsNote 1: All specifications are 100% tested at T A = +25°C. Specification limits over temperature (T A = T MIN to T MAX ) are guaranteedby design and characterization, not production tested.Note 2: Guaranteed by design. Not production tested.(V CC = +3.3V, T A = +25°C, unless otherwise noted.)(V CC = +3.0V to +5.5V, T A = -20°C to +85°C, unless otherwise noted. Typical values specified at +25°C.) (Note 1)PARAMETERSYMBOL CONDITIONSMIN TYPMAXUNITS Output High Voltage V OH I SOURCE = 1.6mA V CC - 0.4V Output Low Voltage V OLI SINK = 1.6mA0.4VTIMINGSerial Clock Frequency f SCL 4.3MHz SCK Pulse High Width t CH 100ns SCK Pulse Low Width t C L 100ns CSB Fall to SCK Rise t CSS C L = 10pF 100ns CSB Fall to Output Enable t DV C L = 10pF 100ns CSB Rise to Output Disable t TR C L = 10pF 100ns SCK Fall to Output Data Validt DOC L = 10pF100ns-50510-103050OUTPUT CODE ERROR vs. VOLTAGE DIFFERENTIALM A X 6675 t o c 02VOLTAGE DIFFERENTIAL (mV)O U T P U T C O D E E R R O R (L S B )1020401086420451530607590OUTPUT CODE ERROR vs. AMBIENT TEMPERATUREM A X 6675 t o c 01TEMPERATURE (°C)O U T P U T C O D E E R R O R (L S B )to-Digital Converter (0°C to +1024°C)Typical Operating CharacteristicsElectrical Characteristics (continued)Detailed DescriptionThe MAX6675 is a sophisticated thermocouple-to-digi- tal converter with a built-in 12-bit analog-to-digital con-verter (ADC). The MAX6675 also contains cold-junction compensation sensing and correction, a digital con- troller, an SPI-compatible interface, and associated control logic.The MAX6675 is designed to work in conjunction with an external microcontroller (µC) or other intelligence in ther-mostatic, process-control, or monitoring applications. Temperature ConversionThe MAX6675 includes signal-conditioning hardware to convert the thermocouple’s signal into a voltage compat-ible with the input channels of the ADC. The T+and T- inputs connect to internal circuitry that reduces the intro- duction of noise errors from the thermocouple wires. Before converting the thermoelectric voltages into equivalent temperature values, it is necessary to com-pensate for the difference between the thermocouple cold-junction side (MAX6675 ambient temperature) and a 0°C virtual reference. For a type-K thermocouple, the voltage changes by 41µV/°C, which approximates the thermocouple characteristic with the following linear equation:V OUT = (41µV / °C) x (T R - T AMB)Where:V OUT is the thermocouple output voltage (µV).T R is the temperature of the remote thermocouple junc-tion (°C).T AMB is the ambient temperature (°C).Cold-Junction CompensationThe function of the thermocouple is to sense a differ- ence in temperature between two ends of the thermo- couple wires. The thermocouple’s hot junction can be read from 0°C to +1023.75°C. The cold end (ambi-ent temperature of the board on which the MAX6675 is mounted) can only range from -20°C to +85°C. While the temperature at the cold end fluctuates, the MAX6675 continues to accurately sense the tempera- ture difference at the opposite end.The MAX6675 senses and corrects for the changes in the ambient temperature with cold-junction compen-sation. The device converts the ambient temperature reading into a voltage using a temperature-sensing diode. To make the actual thermocouple temperature measurement, the MAX6675 measures the voltage from the thermocouple’s output and from the sensing diode. The device’s internal circuitry passes the diode’s volt- age (sensing ambient temperature) and thermocouple voltage (sensing remote temperature minus ambient temperature) to the conversion function stored in the ADC to calculate the thermocouple’s hot-junction tem-perature.Optimal performance from the MAX6675 is achieved when the thermocouple cold junction and the MAX6675 are at the same temperature. Avoid placing heat-gen-erating devices or components near the MAX6675 because this may produce cold-junction-related errors. DigitizationThe ADC adds the cold-junction diode measurement with the amplified thermocouple voltage and reads out the 12-bit result onto the SO pin. A sequence of all zeros means the thermocouple reading is 0°C. A sequence of all ones means the thermocouple reading is +1023.75°C.PIN NAME FUNCTION1GND Ground2T-Alumel Lead of Type-K Thermocouple.Should be connected to ground externally. 3T+Chromel Lead of Type-K Thermocouple4V CC Positive Supply. Bypass with a 0.1µFcapacitor to GND.5SCK Serial Clock Input6CS Chip Select. Set CS low to enable the serialinterface.7SO Serial Data Output8N.C.No Connection to-Digital Converter (0°C to +1024°C)Pin DescriptionApplications InformationSerial InterfaceThe T ypical Application Circuit shows the MAX6675 interfaced with a microcontroller. In this example, the MAX6675 processes the reading from the thermocou- ple and transmits the data through a serial interface. Force CS low and apply a clock signal at SCK to read the results at SO. Forcing CS low immediately stops any conversion process. Initiate a new conversion process by forcing CS high.Force CS low to output the first bit on the SO pin. A complete serial interface read requires 16 clock cycles. Read the 16 output bits on the falling edge of the clock. The first bit, D15, is a dummy sign bit and is always zero. Bits D14–D3 contain the converted temperature in the order of MSB to LSB. Bit D2 is normally low and goes high when the thermocouple input is open. D1 is low to provide a device ID for the MAX6675 and bit D0 is three-state.Figure 1a is the serial interface protocol and Figure 1b shows the serial interface timing. Figure 2 is the SO out-put.Open ThermocoupleBit D2 is normally low and goes high if the thermocou- ple input is open. In order to allow the operation of the open thermocouple detector, T- must be grounded. Make the ground connection as close to the GND pin as possible.Noise ConsiderationsThe accuracy of the MAX6675 is susceptible to power- supply coupled noise. The effects of power-supply noise can be minimized by placing a 0.1µF ceramic bypass capacitor close to the supply pin of the device.Thermal ConsiderationsSelf-heating degrades the temperature measurement accuracy of the MAX6675 in some applications. The magnitude of the temperature errors depends on the thermal conductivity of the MAX6675 package, the mounting technique, and the effects of airflow. Use a large ground plane to improve the temperature mea- surement accuracy of the MAX6675.The accuracy of a thermocouple system can also be improved by following these precautions:●Use the largest wire possible that does not shuntheat away from the measurement area.●If small wire is required, use it only in the region ofthe measurement and use extension wire for theregion with no temperature gradient.●Avoid mechanical stress and vibration, which couldstrain the wires.●When using long thermocouple wires, use a twisted-pair extension wire.●Avoid steep temperature gradients.●Try to use the thermocouple wire well within its tem-perature rating.●Use the proper sheathing material in hostile environ-ments to protect the thermocouple wire.●Use extension wire only at low temperatures andonly in regions of small gradients.●Keep an event log and a continuous record of ther-mocouple resistance.Reducing Effects of Pick-Up NoiseThe input amplifier (A1) is a low-noise amplifier designed to enable high-precision input sensing. Keep the thermocouple and connecting wires away from elec-trical noise sources.to-Digital Converter (0°C to +1024°C)Figure 2. SO OutputFigure 1b. Serial Interface TimingFigure 1a. Serial Interface ProtocolBIT DUMMY SIGN BIT12-BITTEMPERATURE READING THERMOCOUPLEINPUTDEVICE IDSTATE Bit15141312111098765432100MSBLSBThree-stateCSSCKSOD15D14D13D12D11D10D9D8D7D6D5D4D3D2D1D0to-Digital Converter (0°C to +1024°C)PACKAGE TYPEPACKAGE CODE OUTLINE ND PATTERN NO.8 SOS8+221-004190-0096to-Digital Converter (0°C to +1024°C)Package InformationFor the latest package outline information and land patterns (footprints), go to /packages . Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status.Chip InformationTRANSISTOR COUNT: 6720PROCESS: BiCMOSREVISION NUMBERREVISION DATE DESCRIPTIONPAGES CHANGED24/14Removed automotive reference136/21Updated equation in Temperature Compensation section.4Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.to-Digital Converter (0°C to +1024°C)Revision HistoryFor pricing, delivery, and ordering information, please visit Maxim Integrated’s online storefront at https:///en/storefront/storefront.html.。

MAXIM 化数字电位器MAX5481, MAX5482, MAX5483, MAX548 说明书

ENGLISH•简体中文•日本語•概述状况状况：生产中。

下载Notes MAX5481Linear13-WireSerial SPINon-Volatile102410253519.6$1.95@1kMAX548250$1.95 @1kMAX548310$1.95 @1kMAX548450$1.95 @1k查看所有Digital Potentiometers (128)引脚配置相关产品MAX5494,MAX5495,MAX5496, ...10位、双路、非易失、线性变化数字电位器类似产品：浏览其它类似产品线查看所有Digital Potentiometers (128产品)顶标MAX5481顶标MAX5482顶标MAX5483顶标MAX5484新品发布[ 2005-08-03 ]应用工程师帮助选型，下个工作日回复参数搜索应用帮助概述技术文档定购信息概述关键特性应用/使用关键指标图表注释、注解相关产品数据资料应用笔记评估板设计指南可靠性报告软件/模型价格与供货样品在线订购封装信息无铅信息参考文献： 19-3708 Rev. 4; 2008-03-12本页最后一次更新: 2008-03-27联络我们：信息反馈、提出问题 • 对该网页的评价 • 发送本网页 • 隐私权政策 • 法律声明 © 2010 Maxim Integrated Products版权所有General DescriptionThe MAX5481–MAX5484 10-bit (1024-tap) nonvolatile,linear-taper, programmable voltage-dividers and vari-able resistors perform the function of a mechanical potentiometer, but replace the mechanics with a pin-configurable 3-wire serial SPI™-compatible interface or up/down digital interface. The MAX5481/MAX5482 are 3-terminal voltage-dividers and the MAX5483/MAX5484are 2-terminal variable resistors.The MAX5481–MAX5484 feature an internal, non-volatile, electrically erasable programmable read-only memory (EEPROM) that stores the wiper position for ini-tialization during power-up. The 3-wire SPI-compatible serial interface allows communication at data rates up to 7MHz. A pin-selectable up/down digital interface is also available.The MAX5481–MAX5484 are ideal for applications requiring digitally controlled potentiometers. Two end-to-end resistance values are available (10k Ωand 50k Ω) in a voltage-divider or a variable-resistor configuration (see the Selector G uide ). The nominal resistor temperature coefficient is 35ppm/°C end-to-end, and only 5ppm/°C ratiometric, making these devices ideal for applications requiring low-temperature-coefficient voltage-dividers,such as low-drift, programmable gain-amplifiers.The MAX5481–MAX5484 operate with either a +2.7V to +5.25V single power supply or ±2.5V dual power sup-plies. These devices consume 400µA (max) of supply current when writing data to the nonvolatile memory and 1.0µA (max) of standby supply current. The MAX5481–MAX5484 are available in a space-saving (3mm x 3mm), 16-pin TQFN, or a 14-pin TSSOP pack-age and are specified over the extended (-40°C to +85°C) temperature range.ApplicationsFeatures♦1024 Tap Positions♦Power-On Recall of Wiper Position from Nonvolatile Memory♦16-Pin (3mm x 3mm x 0.8mm) TQFN or 14-Pin TSSOP Package♦35ppm/°C End-to-End Resistance Temperature Coefficient♦5ppm/°C Ratiometric Temperature Coefficient ♦10kΩand 50kΩEnd-to-End Resistor Values♦Pin-Selectable SPI-Compatible Serial Interface or Up/Down Digital Interface ♦1µA (max) Standby Current♦Single +2.7V to +5.25V Supply Operation ♦Dual ±2.5V Supply OperationMAX5481–MAX548410-Bit, Nonvolatile, Linear-Taper DigitalPotentiometers________________________________________________________________Maxim Integrated Products1Ordering InformationPin Configurations19-3708; Rev 5; 4/10For pricing delivery, and ordering information please contact Maxim Direct at 1-888-629-4642,or visit Maxim’s website at .Selector Guide appears at end of data sheet.SPI is a trademark of Motorola, Inc.temperature range.+Denotes a lead(Pb)-free/RoHS-compliant package.*EP = Exposed pad.Ordering Information continued at end of data sheet.Gain and Offset AdjustmentLCD Contrast Adjustment Pressure SensorsLow-Drift Programmable Gain AmplifiersMechanical Potentiometer ReplacementM A X 5481–M A X 548410-Bit, Nonvolatile, Linear-Taper Digital PotentiometersABSOLUTE 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 V SS to GND............................................................-3.5V to +0.3V V DD to V SS .............................................................-0.3V to +6.0V H, L, W to V SS ..................................(V SS - 0.3V) to (V DD + 0.3V)CS , SCLK(INC ), DIN(U/D ), SPI/UD to GND..-0.3V to (V DD + 0.3V)Maximum Continuous Current into H, L, and WMAX5481/MAX5483.........................................................±5mA MAX5482/MAX5484......................................................±1.0mA Maximum Current into Any Other Pin...............................±50mAContinuous Power Dissipation (T A = +70°C)16-Pin TQFN (derate 17.5mW/°C above +70°C).....1398.6mW 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°C Soldering Temperature (reflow).......................................+260°CELECTRICAL CHARACTERISTICSMAX5481–MAX548410-Bit, Nonvolatile, Linear-Taper DigitalPotentiometers_______________________________________________________________________________________3ELECTRICAL CHARACTERISTICS (continued)(V DD = +2.7V to +5.25V, V SS = V GND = 0V, V H = V DD , V L = 0V, 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 5481–M A X 548410-Bit, Nonvolatile, Linear-Taper Digital Potentiometers 4_______________________________________________________________________________________TIMING CHARACTERISTICSNote 2:The DNL and INL are measured with the device configured as a voltage-divider with H = V DD and L = V SS . The wiper termi-nal (W) is unloaded and measured with a high-input-impedance voltmeter.Note 3:The DNL_R and INL_R are measured with D.N.C. unconnected and L = V SS = 0V. For V DD = +5V, the wiper terminal is dri-ven with a source current of I W = 80µA for the 50k Ωdevice and 400µA for the 10k Ωdevice. For V DD = +3V, the wiper termi-nal is driven with a source current of 40µA for the 50k Ωdevice and 200µA for the 10k Ωdevice.Note 4:The wiper resistance is measured using the source currents given in Note 3.Note 5:The device draws higher supply current when the digital inputs are driven with voltages between (V DD - 0.5V) and (V GND +0.5V). See Supply Current vs. Digital Input Voltage in the Typical Operating Characteristics .Note 6:Wiper settling test condition uses the voltage-divider configuration with a 10pF load on W. Transition code from 00000 00000to 01111 01111 and measure the time from CS going high to the wiper voltage settling to within 0.5% of its final value.MAX5481–MAX548410-Bit, Nonvolatile, Linear-Taper DigitalPotentiometers_______________________________________________________________________________________5-1.0-0.6-0.8-0.2-0.40.200.40.80.61.002563841285126407688961024DNL vs. CODE (MAX5483)CODED N L (L S B )V DD = 2.7V-1.0-0.6-0.8-0.2-0.40.200.40.80.61.002563841285126407688961024DNL vs. CODE (MAX5483)CODED N L (L S B )V DD = 5V-2.0-1.0-1.50-0.50.51.01.5 2.0INL vs. CODE (MAX5483)I N L (L S B )V DD = 2.7V02563841285126407688961024CODE-2.0-1.0-1.50-0.50.51.01.5 2.0INL vs. CODE (MAX5483)I N L (L S B )V DD = 3V2563841285126407688961024CODE-2.0-1.0-1.50-0.50.51.01.5 2.0INL vs. CODE (MAX5483)I N L (L S B )V DD = 5V02563841285126407688961024CODE-1.0-0.6-0.8-0.2-0.40.200.40.80.61.002563841285126407688961024DNL vs. CODE (MAX5481)CODED N L (L S B )-1.0-0.6-0.8-0.2-0.40.200.40.80.61.002563841285126407688961024DNL vs. CODE (MAX5481)CODED N L (L S B )V DD = 5V-1.0-0.6-0.8-0.2-0.40.200.40.80.61.002563841285126407688961024INL vs. CODE (MAX5481)CODEI N L (L S B )-1.0-0.6-0.8-0.2-0.40.200.40.80.61.002563841285126407688961024INL vs. CODE (MAX5481)CODEI N L (L S B )Typical Operating Characteristics(V DD = 5.0V, V SS = 0V, T A = +25°C, unless otherwise noted.)M A X 5481–M A X 548410-Bit, Nonvolatile, Linear-Taper Digital Potentiometers 6_______________________________________________________________________________________-1.0-0.6-0.8-0.2-0.40.200.40.80.61.002563841285126407688961024DNL vs. CODE (MAX5484)CODED N L (L S B )-1.0-0.6-0.8-0.2-0.40.200.40.80.61.002563841285126407688961024DNL vs. CODE (MAX5484)CODED N L (L S B )-1.0-0.6-0.8-0.2-0.40.200.40.80.61.002563841285126407688961024INL vs. CODE (MAX5484)CODEI N L (L S B )-1.0-0.6-0.8-0.2-0.40.200.40.80.61.002563841285126407688961024INL vs. CODE (MAX5484)CODEI N L (L S B )-1.0-0.6-0.8-0.2-0.40.200.40.80.61.002563841285126407688961024DNL vs. CODE (MAX5482)CODED N L (L S B )-1.0-0.6-0.8-0.2-0.40.200.40.80.61.002563841285126407688961024DNL vs. CODE (MAX5482)CODED N L (L S B )-1.0-0.6-0.8-0.2-0.40.200.40.80.61.002563841285126407688961024INL vs. CODE (MAX5482)CODEI N L (L S B )V DD = 2.7V-1.0-0.6-0.8-0.2-0.40.200.40.80.61.02563841285126407688961024INL vs. CODE (MAX5482)CODEI N L (L S B )V DD = 5V02010403050607080WIPER RESISTANCE vs. CODE (VARIABLE RESISTOR, T A = -40°C)M A X 5481 t o c 18R W (Ω)2563841285126407688961024CODETypical Operating Characteristics (continued)(V DD = 5.0V, V SS = 0V, T A = +25°C, unless otherwise noted.)MAX5481–MAX5484Typical Operating Characteristics (continued)(V DD = 5.0V, V SS = 0V, T A = +25°C, unless otherwise noted.)10-Bit, Nonvolatile, Linear-Taper DigitalPotentiometers_______________________________________________________________________________________702010403050607080WIPER RESISTANCE vs. CODE (VARIABLE RESISTOR, T A = +25°C)M A X 5481 t oc 19R W (Ω)2563841285126407688961024CODE2010403050607080WIPER RESISTANCE vs. CODE (VARIABLE RESISTOR, T A = +85°C)M A X 5481 t o c 20R W (Ω)2563841285126407688961024CODE10302050604070W-TO-L RESISTANCE vs. CODE(MAX5484)R W L (k Ω)02563841285126407688961024CODE02641012814W-TO-L RESISTANCE vs. CODE(MAX5483)R W L (k Ω)2563841285126407688961024CODE18.018.519.019.520.020.521.021.522.0012345WIPER RESISTANCE vs. WIPER VOLTAGE(VARIABLE RESISTOR)WIPER VOLTAGE (V)R W (Ω)-2.0-1.5-1.0-0.500.51.01.52.0-40-1510356085END-TO-END (R HL ) % CHANGE vs. TEMPERATURE (VOLTAGE-DIVIDER)M A X 5481 t o c 24TEMPERATURE (°C)E N D -T O -E N D R E S I S T A N C E C H A N G E (%)-2.0-1.5-1.0-0.500.51.01.52.0-40-1510356085WIPER-TO-END RESISTANCE (R WL ) % CHANGE vs. TEMPERATURE (VARIABLE RESISTOR)TEMPERATURE (°C)W I P E R -T O -E N D R E S I S T A N C E C H A N G E (%)00.30.90.61.21.5-4010-15356085STANDBY SUPPLY CURRENTvs. TEMPERATURETEMPERATURE (°C)I D D (μA )DIGITAL SUPPLY CURRENT vs. DIGITAL INPUT VOLTAGEDIGITAL INPUT VOLTAGE (V)I D D (μA )4.54.03.53.02.52.01.51.00.5110100100010,0000.15.0M A X 5481–M A X 548410-Bit, Nonvolatile, Linear-Taper Digital Potentiometers Typical Operating Characteristics (continued)(Circuit of Figure 1, T A = +25°C, unless otherwise noted.)1μs/divTAP-TO-TAP SWITCHING TRANSIENTRESPONSE (MAX5481)V W(AC-COUPLED)20mV/divCS 2V/divH = V DD , L = GND C W = 10pFFROM CODE 01 1111 1111TO CODE 10 0000 00004μs/divTAP-TO-TAP SWITCHING TRANSIENTRESPONSE (MAX5482)V W(AC-COUPLED)20mV/divCS 2V/divH = V DD , L = GND C W = 10pFFROM CODE 01 1111 1111TO CODE 10 0000 0000WIPER RESPONSE vs. FREQUENCY(MAX5481)FREQUENCY (kHz)G A I N (d B )100101-20-15-10-5-250.11000WIPER RESPONSE vs. FREQUENCY(MAX5482)FREQUENCY (kHz)G A I N (d B )100101-20-15-10-50-250.11000THD+N vs. FREQUENCY(MAX5481)FREQUENCY (kHz)T H D +N (%)1010.10.0010.010.11100.00010.01100THD+N vs. FREQUENCY(MAX5482)FREQUENCY (kHz)T H D +N (%)1010.10.0010.010.11100.00010.0110004020806012010014018016020002563841285126407688961024RATIOMETRIC TEMPERATURE COEFFICIENT vs. CODECODER A T I O M E T R I C T E M P C O (p p m )100300200500600400700VARIABLE-RESISTOR TEMPERATURECOEFFICIENT vs. CODET C V R (p p m )02563841285126407688961024CODE10-Bit, Nonvolatile, Linear-Taper DigitalPotentiometersPin DescriptionMAX5481–MAX5484M A X 5481–M A X 548410-Bit, Nonvolatile, Linear-Taper Digital Potentiometers Pin Description (continued)(MAX5483/MAX5484 Variable Resistors)MAX5481–MAX548410-Bit, Nonvolatile, Linear-Taper DigitalPotentiometersFunctional DiagramsM A X 5481–M A X 548410-Bit, Nonvolatile, Linear-Taper Digital Potentiometers Detailed DescriptionThe MAX5481/MAX5482 linear programmable voltage-dividers and the MAX5483/MAX5484 variable resistors feature 1024 tap points (10-bit resolution) (see the Functional Diagrams ). These devices consist of multi-ple strings of equal resistor segments with a wiper con-tact that moves among the 1024 points through a pin-selectable 3-wire SPI-compatible serial interface or up/down interface. The MAX5481/MAX5483 provide a total end-to-end resistance of 10k Ω, and the MAX5482/MAX5484 have an end-to-end resistance of 50k Ω. The MAX5481/MAX5482 allow access to the high, low, and wiper terminals for a standard voltage-divider configuration.MAX5481/MAX5482 ProgrammableVoltage-DividersThe MAX5481/MAX5482 programmable voltage-dividers provide a weighted average of the voltage between the H and L inputs at the W output. Both devices feature 10-bit resolution and provide up to 1024 tap points between the H and L voltages. Ideally,the V L voltage occurs at the wiper terminal (W) when all data bits are zero and the V H voltage occurs at the wiper terminal when all data bits are one. The step size (1 LSB) voltage is equal to the voltage applied across terminals H and L divided by 210. Calculate the wiper voltage V Was follows:Functional Diagrams (continued)MAX5481–MAX548410-Bit, Nonvolatile, Linear-Taper DigitalPotentiometerswhere D is the decimal equivalent of the 10 data bits writ-ten (0 to 1023), V HL is the voltage difference between the H and L terminals:The MAX5481 includes a total end-to-end resistance value of 10k Ωwhile the MAX5482 features an end-to-end resistance value of 50k Ω. These devices are not intended to be used as a variable resistor . Wiper cur-rent creates a nonlinear voltage drop in series with the wiper. To ensure temperature drift remains within speci-fications, do not pull current through the voltage-divider wiper. Connect the wiper to a high-impedance node.Figures 1 and 2 show the behavior of the MAX5481’s resistance from W to H and from W to L. This does not apply to the variable-resistor devicesMAX5483/MAX5484 Variable ResistorsThe MAX5483/MAX5484 provide a programmable resistance between W and L. The MAX5483 features a total end-to-end resistance value of 10k Ω, while the MAX5484 provides an end-to-end resistance value of 50k Ω. The programmable resolution of this resistance is equal to the nominal end-to-end resistance divided by 1024 (10-bit resolution). For example, each nominal segment resistance is 9.8Ωand 48.8Ωfor the MAX5483and the MAX5484, respectively.wiper position from the 1024 possible positions, result-ing in 1024 values for the resistance from W to L.Calculate the resistance from W to L (R WL ) by using the where D is decimal equivalent of the 10 data bits writ-ten, R W-L is the nominal end-to-end resistance, and R Z is the zero-scale error. Table 1 shows the values of R WL at selected codes for the MAX5483/MAX5484.Digital InterfaceConfigure the MAX5481–MAX5484 by a pin-selectable,3-wire, SPI-compatible serial data interface or an up/down interface. Drive SPI/UD high to select the 3-wire SPI-compatible interface. Pull SPI/UD low to select the up/down interface.V FSE V andV ZSE V FSE HL ZSE HL =⎡⎣⎢⎤⎦⎥=⎡⎣⎢⎤⎦⎥10241024,Figure 1. Resistance from W to H vs. Code (10k ΩVoltage-Divider)Figure 2. Resistance from W to L vs. Code (10k ΩVoltage-Divider)M A X 5481–M A X 548410-Bit, Nonvolatile, Linear-Taper Digital Potentiometers SPI-Compatible Serial InterfaceDrive SPI/UD high to enable the 3-wire SPI-compatible serial interface (see Figure 3). This write-only interface contains three inputs: chip select (CS ), data in (DIN(U/D )), and data clock (SCLK(INC )). Drive CS low to load the data at DIN(U/D ) synchronously into the shift register on each SCLK(INC ) rising edge.The WRITE command (C1, C0 = 00) requires 24 clock cycles to transfer the command and data (Figure 4a).The COPY commands (C1, C0 = 10 or 11) use either eight clock cycles to transfer the command bits (Figure 4b) or 24 clock cycles with the last 16 data bits disre-garded by the device.After loading the data into the shift register, drive CS high to latch the data into the appropriate control regis-ter. Keep CS low during the entire serial data stream to avoid corruption of the data. Table 2 shows the com-mand decoding.Write Wiper RegisterData written to this register (C1, C0 = 00) controls the wiper position. The 10 data bits (D9–D0) indicate the position of the wiper. For example, if DIN(U/D ) = 00 00000000, the wiper moves to the position closest to L. If DIN(U/D ) = 11 1111 1111, the wiper moves closest to H.This command writes data to the volatile random access memory (RAM), leaving the NV register unchanged. When the device powers up, the data stored in the NV register transfers to the wiper register,moving the wiper to the stored position. Figure 5 shows how to write data to the wiper register.Table 2. Command Decoding*X = Don’t care.Figure 3. SPI-Compatible Serial-Interface Timing Diagram (SPI/UD = 1)10-Bit, Nonvolatile, Linear-Taper DigitalPotentiometers ArrayMAX5481–MAX5484Figure4. Serial SPI-Compatible Interface FormatFigure5. Write Wiper Register OperationM A X 5481–M A X 548410-Bit, Nonvolatile, Linear-Taper Digital Potentiometers Copy Wiper Register to NV RegisterThe copy wiper register to NV register command (C1,C0 = 10) stores the current position of the wiper to the NV register for use at power-up. Figure 6 shows how to copy data from wiper register to NV register. The oper-ation takes up to 12ms (max) after CS goes high to complete and no other operation should be performed until completion.Copy NV Register to Wiper RegisterThe copy NV register to wiper register (C1, C0 = 11)restores the wiper position to the current value stored in the NV register. Figure 7 shows how to copy data from the NV register to the wiper register.Digital Up/Down InterfaceFigure 8 illustrates an up/down serial-interface timing diagram. In digital up/down interface mode (SPI/UD =0), the logic inputs CS , DIN(U/D ), and SCLK(INC ) con-trol the wiper position and store it in nonvolatile memory (see Table 3). The chip-select (CS ) input enables the serial interface when low and disables the interface when high. The position of the wiper is stored in the nonvolatile register when CS transitions from low to high while SCLK(INC ) is high.When the serial interface is active (CS low), a high-to-low (falling edge) transition on SCLK(INC ) increments or decrements the internal 10-bit counter depending on the state of DIN(U/D ). If DIN(U/D ) is high, the wiper increments. If DIN(U/D ) is low, the wiper decrements.The device stores the value of the wiper position in the nonvolatile memory when CS transitions from low to high while SCLK(INC ) is high. The host system can disablethe serial interface and deselect the device without stor-ing the latest wiper position in the nonvolatile memory by keeping SCLK(INC ) low while taking CS high.Upon power-up, the MAX5481–MAX5484 load the value of nonvolatile memory into the wiper register, and set the wiper position to the value last stored.Figure 6. Copy Wiper Register to NV Register OperationFigure 7. Copy NV Register to Wiper Register OperationMAX5481–MAX548410-Bit, Nonvolatile, Linear-Taper DigitalPotentiometersStandby ModeThe MAX5481–MAX5484 feature a low-power standby mode. When the device is not being programmed, it enters into standby mode and supply current drops to 0.5µA (typ).Nonvolatile MemoryThe internal EEPROM consists of a nonvolatile register that retains the last value stored prior to power-down.The nonvolatile register is programmed to midscale at the factory. The nonvolatile memory is guaranteed for 50 years of wiper data retention and up to 200,000wiper write cycles.Power-UpUpon power-up, the MAX5481–MAX5484 load the data stored in the nonvolatile wiper register into the volatile wiper register, updating the wiper position with the data stored in the nonvolatile wiper register.Applications InformationThe MAX5481–MAX5484 are ideal for circuits requiring digitally controlled adjustable resistance, such as LCD contrast control (where voltage biasing adjusts the dis-play contrast), or programmable filters with adjustable gain and/or cutoff frequency.Positive LCD Bias ControlFigures 9 and 10 show an application where a voltage-divider or a variable resistor is used to make an adjustable, positive LCD-bias voltage. The op amp pro-vides buffering and gain to the voltage-divider network made by the programmable voltage-divider (Figure 9) or to a fixed resistor and a variable resistor (see Figure 10).Programmable Gain and Offset AdjustmentFigure 11 shows an application where a voltage-divider and a variable resistor are used to make a programma-ble gain and offset adjustment.Figure 8. Up/Down Serial-Interface Timing Diagram (SPI/UD = 0)M A X 5481–M A X 548410-Bit, Nonvolatile, Linear-Taper Digital Potentiometers 18______________________________________________________________________________________Programmable FilterFigure 12 shows the configuration for a 1st-order pro-grammable filter using two variable resistors. Adjust R2for the gain and adjust R3 for the cutoff frequency. Use the following equations to estimate the gain (G) and the 3dB cutoff frequency (f C):Figure 10. Positive LCD Bias Control Using a Variable ResistorFigure 12. Programmable FilterFigure 11. Programmable Gain/Offset AdjustmentFigure 9. Positive LCD Bias Control Using a Voltage-DividerMAX5481–MAX548410-Bit, Nonvolatile, Linear-Taper DigitalPotentiometers______________________________________________________________________________________19Chip InformationPROCESS: BiCMOSSelector GuidePin Configurations (continued)Ordering Information (continued)Note: All devices are specified over the -40°C to +85°C operating temperature range.+Denotes a lead(Pb)-free/RoHS-compliant package.*EP = Exposed pad.Package InformationFor the latest package outline information and land patterns, go to /packages . Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package draw-ings may show a different suffix character, but the drawing per-tains to the package regardless of RoHS status.M A X 5481–M A X 548410-Bit, Nonvolatile, Linear-Taper Digital Potentiometers Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.20____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600©2010 Maxim Integrated ProductsMaxim is a registered trademark of Maxim Integrated Products, Inc.。

MAX5873使用说明

MAX5873双路DAC1.概述MAX5873是先进的12位、200Msps、双路数模转换器(DAC)。

能够满足无线基站及其它通信领域信号合成应用的要求。

该双路DAC采用3.3V和1.8V电源供电，具有极高的动态性能，如fOUT = 16MHz时，无杂散动态范围(SFDR)达78dBc，支持200Msps刷新速率，功耗仅为255mW。

MAX5873的电流控制结构支持2mA至20mA的满幅电流输出，允许0.1VP-P至1VP-P 的差分输出电压摆幅。

MAX5873集成的1.2V带隙基准和控制放大器可确保高精度和低噪声。

独立基准输入(REFIO)允许使用外部基准以实现最佳灵活性，并提高增益精度。

MAX5873的数字和时钟输入可接收3.3V CMOS电平。

MAX5873灵活的数据输入总线既支持双端口输入也支持单端口间插输入。

MAX5873可提供68引脚带裸焊盘(EP)的QFN封装，适用于扩展温度范围(-40°C至+85°C)。

欲查找与MAX5873引脚兼容的14位和16位版本，请分别参考MAX5874和MAX5875的数据资料。

与MAX5873功能兼容的LVDS接口版本，请参考MAX5876的数据资料。

2.关键特性•200Msps输出刷新速率•fOUT = 16MHz时，噪声谱密度= -152dBFS/Hz•极佳的SFDR和IMD◦fOUT = 16MHz时，SFDR = 78dBc (至奈奎斯特频率)◦fOUT = 80MHz时，SFDR = 73dBc (至奈奎斯特频率)◦fOUT = 10MHz时，IMD = -85dBc◦fOUT = 80MHz时，IMD = -74dBc•fOUT = 61MHz时，ACLR = 74dB•2mA至20mA满量程输出电流•CMOS兼容数字和时钟输入•片上1.2V带隙基准•功耗低至255mW•68引脚QFN-EP封装•提供评估板(MAX5875EVKIT)3.芯片结构3.1引脚配置运行。

MAX774中文资料

SHDN REF
FB REF GND OUT
MAX774 MAX775 MAX776
7 6 5
DIP/SO
________________________________________________________________ Maxim Integrated Products
1
Call toll free 1-800-998-8800 for free samples or literature.
ELECTRICAL CHARACTERISTICS
PARAMETER V+ Input Voltage Range SYMBOL V+
(V+ = 5V, ILOAD = 0mA, CREF = 0.1µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) CONDITIONS V+ = 16.5V, SHDN ≤ 0.4V (operating) Supply Current V+ = 10V, SHDN ≥ 1.6V (shutdown) V+ = 16.5V, SHDN ≥ 1.6V (shutdown) FB Trip Point 3V ≤ V+ ≤ 16.5V MAX77_C FB Input Current IFB MAX77_E MAX77_M MAX774 Output Voltage VOUT MAX775 MAX776 MAX77_C Reference Voltage VREF IREF = 0µA MAX77_E MAX77_M REF Load Regulation REF Line Regulation Output Voltage Line Regulation (Circuit of Figure 2— Bootstrapped) Output Voltage Load Regulation (Circuit of Figure 2— Bootstrapped) 0µA ≤ IREF ≤ 100µA 3V ≤ V+ ≤ 16.5V MAX774, 4V ≤ V+ ≤ 15V, ILOAD = 0.5A MAX775, 4V ≤ V+ ≤ 8V, ILOAD = 0.2A MAX776, 4V ≤ V+ ≤ 6V, ILOAD = 0.1A MAX774, 0A ≤ ILOAD ≤ 1A, V+ = 5V MAX775, 0mA ≤ ILOAD ≤ 500mA, V+ = 5V MAX776, 0mA ≤ ILOAD ≤ 400mA, V+ = 5V MAX77_C/E MAX77_M -4.80 -11.52 -14.40 1.4700 1.4625 1.4550 -5 -12 -15 1.5 1.5 1.5 4 4 40 0.035 0.088 0.137 1.5 1.5 1.0 mV/A mV/V -10 2 4 10 ±50 ±70 ±90 -5.20 -12.48 -15.60 1.5300 1.5375 1.5450 10 15 100 mV µV/V V V nA mV MIN 3.0 TYP MAX 16.5 100 5 µA UNITS V

BONDTECH Ender-7 LGX Lite 和 Mosquito 安装指南说明书

Manuals+— User Manuals Simpliﬁed.BONDTECH Ender-7 LGX Lite And Mosquito On The Creality Owner’s ManualHome » BONDTECH » BONDTECH Ender-7 LGX Lite And Mosquito On The Creality Owner’s ManualContents1 BONDTECH Ender-7 LGX Lite And Mosquito On TheCreality2 HOW TO Install3 TAKE GOOD CARE OF IT4 HOW TO GET HELP5 Documents / Resources5.1 ReferencesBONDTECH Ender-7 LGX Lite And Mosquito On The Creality7. Loosen the three M3 screws holding the extruder to the motor using a 2 mm hex key.Pull away the extruder gear.Fasten the three M3 screws holding the extruder to the motor.Undo the four M3 screws on the bottom of the gantry front side using a 2 mm hex key.11. Undo the four M3 screws on the bottom of the gantry back side using a 2 mm hex key.12. Use a ﬂathead screwdriver or something similar to pop oﬀ the gantry cowling.13. Cut the zipties securing the wire loom coming from the toolhead.14. Disconnect all wires coming from the toolhead.15. Pull the toolhead wiring loom through the gantry cowling.16. Undo the two M3 screws holding the toolhead to the x-carriage using a 2.5 mm hex key.17. Remove the wires from the conduit.18. Undo the two M3 screws holding the fan using a 2 mm hex key.19. Undo the four M3 screws holding the hotend using a 2 mm hex key.20. Add the conduit holder to the LGX lite using two low proﬁle M3x8 screws and a 2 mm hex key.21. Add the mount to the bottom of the LGX lite using three low proﬁle M3x8 screws.22. Add the mount to the hotend using two M2.5×6 SHCS screws and a 2 mm hex key.23. Add the included 40 mm PTFE insert and a collet clip.24. Remove the heater cartridge and thermistor from the original hotend and add to the Mosquito.25. Route wires as shown.26. Add the LGX lite and hotend to the x-carriage by pushing them from the front.27. Fasten the hotend to the x-carriage using included low proﬁle M3x8 screws and a 2 mm hex key.28. Fasten the fan to the hotend using the included M2.5×16 screws and a 2 mm hex key.29. Fasten the cowling to the x-carriage back using the same SHCS screws and a 2.5mm hex key.30. Push and pull the wiring loom through the conduit.31. Using some tape and a spare piece of ﬁlament or string helps with this step.32. Secure the conduit to the side of the LGX lite using the two included zip ties.33. Place the gantry cowling loosely on the gantry and feed the conduit into it.34. Reconnect all the connectors unplugged previously.35. Click the gantry cowling back in place and secure it using the same screws on the back.36. Attach the bowden tube.’37. Unscrew all screws holding the bottom cover on.38. Remove the bottom cover.39. Power on the printer and be careful around the now live wires during the following step.40. With a multimeter, measure between PSU ground and the extruder trimpot.It should be aboout 1.25 volts from factory. Dial this down to 0.90 volts.41. Power it down and close it back up and you are done with the hardware conﬁguration.Please see the Quick Start Guide for software conﬁguration and print proﬁles.TAKE GOOD CARE OF ITEvery 6 months, or sooner if you have a higher than 15h per week average usage, perform the following maintenance operations:1. With a tooth brush and alcohol:a. Clean the double gear and the drive gearsb. Clean the needle bearings2. With a ﬁne brush and lubricanta. Lubricate the needle bearings3. With compressed aira. Blow the housing plastic parts to remove dust and dirt particlesHOW TO GET HELPWe are available to help you with any questions or issues you may have. Simply go to our website where you can access our customer support and send us your questions or follow the provided link:https://www.bondtech.se/contact/#tab_technical-support-requestswww.bondtech.seDocuments / ResourcesBONDTECH Ender-7 LGX Lite And Mosquito On The Creality [pdf] Owner's ManualEnder-7 LGX Lite And Mosquito On The Creality, Ender-7, LGX Lite And Mosquito On The Creality, Lite And Mosquito On The Creality, And Mosquito On The Creality, Mosquito On The Creality, On The Creality, The CrealityReferencesBondtech Dual Drive Extruders and Extrusion Upgrade KitsContact Bondtech for support or to send us a messageManuals+,。

MAX6675中文数据手册

图 1a 是串行接口协议图，图 1b 是串行接口时序图。图 2 为 SO 输出数据格式。
热电偶开路检测
位 D2 一般情况下为 0，在热电偶开路时跳变为 1。为了使热电偶开路检测器能够正常运行，T-必须接地，且接地点需尽可能靠近 GND 引脚。
温升的考虑
在某些应用中器件自身发热会降低 MAX6675 的精度。温度误差的大小取决于 MAX6675 封装的热传导性、安装技术、和气流的影响。使用一个大的地平面可以提高 MAX6675 的温度测量精度。
100
ns
100 ns
100 ns
100 ns
Note 1: 所有参数都是在 TA=25℃下 100%测试。温度超过极限 (TA = TMIN to TMAX) 的参数只从设计和特性上保证，没有产品测试。 Note 2: 从设计上保证，没有产品测试。
（没有特别指出，VCC=+3.3V，TA=+25℃）输出码误差和环境温度
使用适当的保护套保护热电偶
仅仅在低温、温度波动小的区域使用补偿导线
保存事件日志和热电偶阻抗的记录
噪声方面的考虑
MAX6675 的精确度易受电源耦合噪声的影响。电源噪声的影响可以通过放置 1 个 0.1μ F 的陶瓷电容消弱，电容应靠近器件的电源引脚。
减小拾取噪声的影响
输入放大器（A1）是一个低噪声的放大器，它被设计为能够放大高精度的传感器输入信号。确保热电偶和与其想接的导线远离电子噪声源。
可以用以下措施改善热电偶系统的测量精度：
使用尽可能粗的导线，这样的导线不至于从测量区域分流来大量的热
如果要求使用比较细的导线在，则仅仅在测量区使用这种线，在没有温升的地方使用补偿导线

Agilent 11857D 7 mm Test Port Return Cable Set用户指南

Agilent Part Number 11857-90014Supersedes: September 1999Printed in USAOctober 2003Agilent 11857D7 mm Test Port Return Cable SetUser’s and Service Guide1981NoticeThe information contained in this document is subject to change without notice.Agilent Technologies makes no warranty of any kind with regard to this material, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. Agilent Technologies shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing, performance, or use of this material.Agilent Technologies assumes no responsibility for the use or reliability of its software on equipment that is not furnished by Agilent Technologies.This document contains proprietary information which is protected by copyright. All rights are reserved. No part of this document may be photocopied, reproduced, or translated to another language without prior written consent of Agilent Technologies.R ESTRICTED R IGHTS L EGENDUse, duplication, or disclosure by the U.S. Government is subject to restrictions as set forth in subparagraph (c)(1)(ii) of the Rights in Technical Data and Computer Software clause at DFARS 252.227-7013 for DOD agencies, and subparagraphs (c)(1) and (c)(2) of the Commercial Computer Software Restricted Rights clause at FAR 52.227-19 for other agencies.Agilent Technologies, Inc.1400 Fountaingrove ParkwaySanta Rosa, CA 95403-1799, U.S.A.© Copyright 1986-2003 Agilent Technologies, Inc.Documentation WarrantyTHE MATERIAL CONTAINED IN THIS DOCUMENT IS PROVIDED “AS IS,” AND IS SUBJECT TO BEING CHANGED, WITHOUT NOTICE, IN FUTURE EDITIONS. FURTHER, TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, AGILENT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED WITH REGARD TO THIS MANUAL AND ANY INFORMATION CONTAINED HEREIN, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. AGILENT SHALL NOT BE LIABLE FOR ERRORS OR FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES IN CONNECTION WITH THE FURNISHING, USE, OR PERFORMANCE OF THIS DOCUMENT OR ANY INFORMATION CONTAINED HEREIN. SHOULD AGILENT AND THE USER HAVE A SEPARATE WRITTEN AGREEMENT WITH WARRANTY TERMS COVERING THE MATERIAL IN THIS DOCUMENT THAT CONFLICT WITH THESE TERMS, THE WARRANTY TERMS IN THE SEPARATE AGREEMENT WILL CONTROL.Printing Copies of This DocumentTo print copies of this document, download the PDF file from the Agilent Web site:•Go to .•Enter the document’s part number (located on the title page) in the Quick Search box.•Click GO.User’s and Service Guide 11857-90014 3Contacting AgilentT able1 Contacting AgilentOnline assistance:/find/assistUnited States (tel)180****4844Latin America(tel) (305) 269 7500(fax) (305) 269 7599Canada(tel)187****4414(fax) (905) 282-6495Europe(tel) (+31) 20 547 2323(fax) (+31) 20 547 2390New Zealand (tel) 0 800 738 378 (fax) (+64) 4 495 8950Japan(tel) (+81) 426 56 7832(fax) (+81) 426 56 7840Australia(tel) 1 800 629 485(fax) (+61) 3 9210 5947Singapore(tel)180****8100(fax) (65) 836 0252Malaysia(tel) 1 800 828 848 (fax) 1 800 801 664Philippines(tel) (632) 8426802(tel) (PLDT subscriber only):1 800 16510170(fax) (632) 8426809(fax) (PLDT subscriber only):1 800 16510288Thailand(tel) outside Bangkok:(088) 226 008(tel) within Bangkok:(662) 661 3999(fax) (66) 1 661 3714Hong Kong(tel) 800 930 871(fax) (852) 2506 9233Taiwan(tel) 0800-047-866 (fax) (886) 2 25456723People’s Republic ofChina(tel) (preferred):800-810-0189(tel) (alternate):10800-650-0021(fax) 10800-650-0121India(tel) 1-600-11-2929(fax) 000-800-650-11014 User’s and Service Guide 11857-90014General InformationTo obtain optimum performance from this cable set, observe these simple precautions:•Flex and straighten the cables as little and seldom as possible.•Make connections carefully to avoid misalignment and connector damage or inaccurate measurements.•Keep the connectors free of dirt and metallic particles.•If you must clean the connectors, try clean compressed air first. Do not use abrasives. Witha plastic swab, apply only liquid Freon (trichlorotrifluoroethane) as a solvent.•7 mm center conductor recession with collet removed: 0.0 to 0.003 inch.DescriptionThe 11857D cable set consists of two 7 mm 50 ohm cables, specified from 300 kHz to 6 GHz. This set provides shielded RF connections to extend the test ports of S-parameter test sets such as the 85046A. The cables can be ordered as either phase-matched or unmatched.Model Description Qty Part NumberPhase-matched 7 mm 50 ohm cables28120-4779 11857DStandard11857D OptionUnmatched 7 mm 50 ohm cables28120-8899B24User’s and Service Guide 11857-90014 56 User’s and Service Guide 11857-90014Figure1.Model 11857D Cables, Option B24User’s and Service Guide 11857-90014 7Operating CharacteristicsPhysical Characteristics11857D Standard11857D Option B24Impedance 50 ohm (nominal)50 ohm (nominal)Connectors 7 mm 7 mm Phase Match ≤ 4 degrees (at 2 GHz)n/aReturn Loss≥ 24 dB(300 kHz to 3 GHz)≥ 24 dB(300 kHz to 3 GHz)11857D Standard11857D Option B24Length61 cm (24 inches)61 cm (24 inches)Weight (both cables):Net0.91 kg (2 lbs)0.91 kg (2 lbs)Shipping1.36 kg (2 lbs)1.36 kg (2 lbs)8 User’s and Service Guide 11857-90014。

MAX5957AETN+T中文资料

General DescriptionThe MAX5957/MAX5958 triple hot-plug controllers are designed for PCI Express (PCIe)®applications. These devices provide hot-plug control for 12V, 3.3V, and 3.3V auxiliary supplies of three PCIe slots. The MAX5957/MAX5958s’ logic inputs/outputs allow interfacing directly with the system hot-plug management controller or through an SMBus™ with an external I/O expander such as the MAX7313. An integrated debounced attention switch and present-detect signals simplify system design.The MAX5957/MAX5958 drive six external n-channel MOSFETs to control the 12V and 3.3V main outputs. The 3.3V auxiliary outputs are controlled through 0.2Ωn-chan-nel MOSF ETs. Internal charge pumps provide the gate drive for the 12V outputs while the gate drive of the 3.3V output is driven by the 12V input supply clamped to 5.5V above the respective 3.3V main supply rail. The 3.3V aux-iliary outputs are completely independent from the main outputs with their own charge pumps.At power-up, the MAX5957/MAX5958 keep all the MOSFETs (internal and external) off until the supplies rise above their respective undervoltage lockout (UVLO)thresholds. Upon a turn-on command, the MAX5957/MAX5958 enhance the external and internal MOSF ETs slowly with a constant gate current to limit the power-sup-ply inrush current.The MAX5957/MAX5958 actively limit the current to pro-tect all outputs at all times and shut down if an overcur-rent condition occurs. After an overcurrent fault condition,the MAX5957L/MAX5958L latch off while the MAX5957A/MAX5958A automatically restart after a restart time delay.The MAX5957/MAX5958 are offered in latch-off or auto-restart versions (see the Selector Guide ).The MAX5957/MAX5958 are available in a 56-pin TQFN package and operate over the -40°C to +85°C temper-ature range.ApplicationsServersDesktop Mobile Server Platforms WorkstationsEmbedded DevicesFeatureso PCIe Complianto Hot Swap 12V, 3.3V, and 3.3V Auxiliary for 3 PCIe Slots o Integrated Power MOSFETs for Auxiliary Supply Rails o Controls di/dt and dV/dto Active Current Limiting Protects Against Overcurrent/Short-Circuit Conditions o Programmable Current-Limit Timeout o PWRGD Signal Outputs with Programmable Power-On Reset (POR) (160ms Default)o Latched FAULT Signal Output After Overcurrent or Overtemperature Fault o Attention Switch Inputs/Outputs with 4ms Debounce o Present-Detect Inputso Force-On Inputs Facilitate Testing/Debug o Thermal Shutdowno Allow Control Through SMBus with an I/O ExpanderMAX5957/MAX5958Triple PCI Express, Hot-Plug ControllersOrdering Information19-0884; Rev 0; 7/07For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,or visit Maxim’s website at .Pin Configuration and Typical Application Circuit appear at end of data sheet.PCI Express is a registered trademark of PCI-SIG Corp. SMBus is a trademark of Intel Corp.M A X 5957/M A X 5958Triple PCI Express, Hot-Plug Controllers 2_______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGSELECTRICAL CHARACTERISTICS(V 12VIN = V 12S_+= V 12S_-= 12V, V 3.3S_+=V 3.3S_-= V 3.3AUXIN = V ON_= V AUXON_= V FON_= 3.3V, PWRGD_= FAULT_= PORADJ =TIM = OUTPUT_ = 12G_ = 3.3G_ = OPEN, INPUT_ = PRES-DET_= PGND = GND, T A = T J = -40°C to +85°C, unless otherwise noted. Typical values are at T A = T J = +25°C.) (Note 1)Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.(All voltages referenced to GND, unless otherwise noted.)12VIN......................................................................-0.3V to +14V 12G_..........................................................-0.3V to (V 12VIN + 6V)12S_+, 12S_-, 3.3G_..............................-0.3V to (V 12VIN + 0.3V)3.3VAUXIN, ON_, FAULT_, PWRGD_.......................-0.3V to +6V PGND ....................................................................-0.3V to +0.3V All Other Pins ..................................-0.3V to (V 3.3VAUXIN + 0.3V)Continuous Power Dissipation (T A = +70°C)56-Pin Thin QFN (derate 40mW/°C above +70°C).....3200mW Operating Temperature Range ...........................-40°C to +85°C Junction Temperature......................................................+150°C Storage Temperature Range.............................-65°C to +150°C Lead Temperature (soldering, 10s).................................+300°CMAX5957/MAX5958Triple PCI Express, Hot-Plug Controllers_______________________________________________________________________________________3ELECTRICAL CHARACTERISTICS (continued)(V 12VIN = V 12S_+= V 12S_-= 12V, V 3.3S_+=V 3.3S_-= V 3.3AUXIN = V ON_= V AUXON_= V FON_= 3.3V, PWRGD_= FAULT_= PORADJ =TIM = OUTPUT_ = 12G_ = 3.3G_ = OPEN, INPUT_ = PRES-DET_= PGND = GND, T A = T J = -40°C to +85°C, unless otherwiseM A X 5957/M A X 5958Triple PCI Express, Hot-Plug Controllers 4_______________________________________________________________________________________ELECTRICAL CHARACTERISTICS (continued)(V 12VIN = V 12S_+= V 12S_-= 12V, V 3.3S_+=V 3.3S_-= V 3.3AUXIN = V ON_= V AUXON_= V FON_= 3.3V, PWRGD_= FAULT_= PORADJ =TIM = OUTPUT_ = 12G_ = 3.3G_ = OPEN, INPUT_ = PRES-DET_= PGND = GND, T A = T J = -40°C to +85°C, unless otherwiseNote 2:PWRGD_asserts a time t POR_HL after V PGTH12,V PGTH3.3,and V PGTH3.3AUX conditions are met.Note 3:The UVLO for the 3.3V supply is sensed at 3.3S_+.Note 4:This is the time that ON_ or AUXON_ must stay low when resetting a fault condition.MAX5957/MAX5958Triple PCI Express, Hot-Plug Controllers_______________________________________________________________________________________512V INPUT SUPPLY CURRENTvs. TEMPERATUREM A X 5957 t o c 01TEMPERATURE (°C)S U P P L Y C U R R E N T (m A )603510-150.920.940.960.981.001.021.041.061.081.100.90-4085 3.3VAUXIN SUPPLY CURRENTvs. TEMPERATUREM A X 5957 t o c 02TEMPERATURE (°C)3.3V A U X I N S U P P L Y C U R R E N T (m A )603510-150.51.01.52.02.53.03.54.04.55.00-4085ON_ AND AUXON_ LOW-TO-HIGH THRESHOLDVOLTAGE vs. TEMPERATURETEMPERATURE (°C)T H R E S H O L D V O L T A G E (V )603510-151.251.301.351.401.451.501.551.601.20-40853.3VAUXO_ OUTPUT VOLTAGEvs. OUTPUT CURRENTOUTPUT CURRENT (A)O U T P U T V O L T A G E (V )0.80.60.40.20.90.70.50.30.10.51.01.52.02.53.03.54.0001.012G_ AND 3.3G_ GATE CHARGE CURRENT vs. TEMPERATURETEMPERATURE (°C)G A T E C H A R G E C U R R E N T (µA )603510-154.804.854.904.955.005.055.105.155.204.75-408512G_ AND 3.3G_ GATE DISCHARGE CURRENT vs. TEMPERATURETEMPERATURE (°C)G A T E D I S C H A R G E C U R R E N T (µA )603510-15160165170175180150155-40853.3VAUX INTERNAL SWITCHMAXIMUM DROPOUT vs. TEMPERATURETEMPERATURE (°C)D R O P O U T V O L T A G E (V )603510-150.020.040.060.080.100.120.140.160.180.200-408512V AND 3.3V CURRENT-LIMIT THRESHOLDVOLTAGE vs. TEMPERATURETEMPERATURE (°C)12V A N D 3.3V C U R R E N T -L I M I T T H R E S H O L D (m V )603510-151020304050600-4085AUXILIARY CURRENT LIMITvs. TEMPERATURETEMPERATURE (°C)A U X I L I A R Y C U R R E N T (m A )603510-150.100.300.200.400.500.600.700.800.901.00-4085Typical Operating Characteristics(V 12VIN = V 12S_+= 12V, V 3.3S_+= V 3.3S_-= V 3.3AUXIN = V ON_= V AUXON_= V FON_= 3.3V, PWRGD_= FAULT_= PORADJ = TIM =OUTPUT_ = OPEN, INPUT_ = PRES-DET_= PGND = GND. See the Typical Application Circuit .)M A X 5957/M A X 5958Triple PCI Express, Hot-Plug Controllers 6_______________________________________________________________________________________Typical Operating Characteristics (continued)(V 12VIN = V 12S_+= 12V, V 3.3S_+= V 3.3S_-= V 3.3AUXIN = V ON_= V AUXON_= V FON_= 3.3V, PWRGD_= FAULT_= PORADJ = TIM =OUTPUT_ = OPEN, INPUT_ = PRES-DET_= PGND = GND. See the Typical Application Circuit .)12V UNDERVOLTAGE LOCKOUT THRESHOLD vs. TEMPERATUREM A X 5957 t o c 10TEMPERATURE (°C)U V L O T H R E S H O L D (V )6035-15109.859.909.9510.0010.0510.1010.1510.209.80-4085 3.3VAUXON UNDERVOLTAGE LOCKOUT THRESHOLD vs. TEMPERATUREM A X 5957 t o c 11TEMPERATURE (°C)U V L O T H R E S H O L D (V )603510-152.542.582.622.662.702.522.562.602.642.682.50-408512V TURN-ON/TURN-OFF TIMEMAX5957 toc1240ms/div12V OUTPUT VOLTAGE 12G_ON_PWRGD_10V/div20V/div5V/div 5V/div 3.3V TURN-ON/TURN-OFF TIMEMAX5957 toc1340ms/div3.3V OUTPUT 5V/div 3.3G_10V/div ON_5V/div 5V/div3.3V AUXILIARY TURN-ON/TURN-OFF TIMEMAX5957 toc1440ms/div3.3AUXO_OUTPUT VOLTAGE 2V/divAUXON_2V/divPWRGD_2V/divTURN-ON DELAY 3.3V OUTPUT AND3.3V AUXILIARY OUTPUTMAX5957 toc154ms/div5V/div 5V/div 5V/div 5V/div 10V/div3.3VAUXO_OUTPUT VOLTAGE 3.3 OUTPUT VOLTAGE 3.3 INPUT,3.3VAUXIN3.3G_PWRGD FAULT CONDITION ON 12V MAIN OUTPUT(AUTORESTART OPTION)12G_20V/div0A0V0V0V5V/div12V OUTPUT CURRENT 5A/div 100ms/div12V OUTPUT VOLTAGE 10V/divt RESTARTR LOAD STEP TO 1.5ΩMAX5957/MAX5958Triple PCI Express, Hot-Plug Controllers(V 12VIN = V 12S_+= 12V, V 3.3S_+= V 3.3S_-= V 3.3AUXIN = V ON_= V AUXON_= V FON_= 3.3V, PWRGD_= FAULT_= PORADJ = TIM =OUTPUT_ = OPEN, INPUT_ = PRES-DET_= PGND = GND. See the Typical Application Circuit .)_______________________________________________________________________________________7FAULT CONDITION ON 3.3V MAIN OUTPUT(AUTORESTART OPTION)3.3G_10V/divFAULT_5V/div3.3V MAIN OUTPUT CURRENT 2A/div100ms/div3.3V OUTPUT VOLTAGE 5V/divt RESTARTR LOAD STEP TO 0.5Ω0A 0V0V0VFAULT CONDITION ON AUXILIARY OUTPUT(AUTORESTART OPTION)FAULT_2V/div 3.3VAUXO_ OUTPUT CURRENT 500mA/div100ms/div3.3VAUXO_ OUTPUT VOLTAGE 2V/div0A0V 0VFAULT CONDITION ON 12V OUTPUT(LATCH OPTION MAX5958)MAX5957 toc1912G_20V/divFAULT_5V/div12V OUTPUT CURRENT 5A/div100ms/div12V OUTPUT VOLTAGE 10V/divFAULT CONDITION ON 12V OUTPUT12G_20V/divFAULT_5V/div12V OUTPUT CURRENT 5A/div 4ms/div12V OUTPUT VOLTAGE 10V/divR LOAD STEP TO 1.5Ωt FAULTFAULT CONDITION ON 3.3V OUTPUT(LATCHOFF OPTION)3.3G_10V/divFAULT_5V/div3.3V OUTPUT CURRENT 2A/div40ms/div3.3V OUTPUT VOLTAGE 5V/divFAULT CONDITION ON 3.3V MAIN OUTPUT3.3G_10V/div5V/div3.3V OUTPUT CURRENT 2A/div4ms/div3.3V OUTPUT VOLTAGE 5V/divM A X 5957/M A X 5958Triple PCI Express, Hot-Plug Controllers 8_______________________________________________________________________________________Typical Operating Characteristics (continued)(V 12VIN = V 12S_+= 12V, V 3.3S_+= V 3.3S_-= V 3.3AUXIN = V ON_= V AUXON_= V FON_= 3.3V, PWRGD_= FAULT_= PORADJ = TIM =OUTPUT_ = OPEN, INPUT_ = PRES-DET_= PGND = GND. See the Typical Application Circuit .)SHORT CIRCUIT ON 12V MAIN OUTPUTMAX5957 toc2512G_20V/divFAULT_5V/div12V OUTPUT CURRENT 5A/div2ms/div12V OUTPUT VOLTAGE 10V/div SHORT CIRCUIT ON 12V MAIN OUTPUTMAX5957 toc2612G_20V/divFAULT_5V/div12V OUTPUT CURRENT 10A/div4µs/div12V OUTPUT VOLTAGE 10V/div 0V0V 0VFAULT CONDITION ON AUXILIARY OUTPUT(LATCHOFF OPTION)FAULT_2V/div3.3VAUXO_ OUTPUT CURRENT 500mA/div100ms/div3.3VAUXO_ OUTPUT VOLTAGE 2V/divR LOAD STEP TO 3.5ΩMAX5958FAULT CONDITION ON AUXILIARY OUTPUTMAX5957 toc24FAULT_2V/div3.3VAUXO_ OUTPUT CURRENT 500mA/div10ms/div3.3VAUXO_ OUTPUT VOLTAGE 2V/divR LOAD STEP TO 3Ωt FAULTMAX5958SHORT CIRCUIT ON 3.3V MAIN OUTPUTMAX5957 toc273.3G_5V/divFAULT_5V/div3.3V OUTPUT CURRENT 2A/div2ms/div3.3V OUTPUT VOLTAGE 5V/div SHORT CIRCUIT ON 3.3V MAIN OUTPUTMAX5957 toc283.3G_5V/div5V/div 3.3V OUTPUT CURRENT 10A/div2µs/div3.3V OUTPUT VOLTAGE 5V/div 0VMAX5957/MAX5958Triple PCI Express, Hot-Plug Controllers_______________________________________________________________________________________9Typical Operating Characteristics (continued)(V 12VIN = V 12S_+= 12V, V 3.3S_+= V 3.3S_-= V 3.3AUXIN = V ON_= V AUXON_= V FON_= 3.3V, PWRGD_= FAULT_= PORADJ = TIM =OUTPUT_ = OPEN, INPUT_ = PRES-DET_= PGND = GND. See the Typical Application Circuit .)SHORT CIRCUIT ON3.3AUXO_ AUXILIARY OUTPUTFAULT_5V/div3.3VAUXO_ OUTPUT CURRENT 500mA/div2ms/div3.3VAUXO_ OUTPUT VOLTAGE 2V/divMAX5958SHORT CIRCUIT ON 3.3VAUXO_AUXILIARY OUTPUTFAULT_5V/div3.3VAUXO_ OUTPUT CURRENT 5A/div 0A0A 4µs/div3.3VAUXO_ OUTPUT VOLTAGE 2V/div MAX5958POWER-UP INTO FAULT (AUXILIARY SUPPLY)3.3VAUXO_ OUTPUT VOLTAGE 2V/divFAULT_5V/div3.3VAUXO_ OUTPUT CURRENT 500mA/div4ms/divAUXON_5V/div t SUR LOAD = 3ΩMAX5958POWER-UP INTO FAULT (3.3V MAIN)MAX5957 toc324ms/div3.3V OUTPUT CURRENT FAULT_3.3G_3.3V OUTPUT VOLTAGE ON_, AUXON_5A/div5V/div5V/div 2V/div5V/div POWER-UP INTO FAULT (12V MAIN OUTPUT)MAX5957 toc3312V OUTPUT VOLTAGE 10V/div FAULT_5V/div12V OUTPUT CURRENT 5A/div 4ms/div ON_, AUXON_5V/div t SU12G_10V/divPRESENT-DETECT (ON/OFF) OPERATIONMAX5957 toc3440ms/div12V OUTPUT VOLTAGEPWRGD_3.3VAUXO_OUTPUT VOLTAGE PRES-DET_10V/div5V/div 5V/div5V/divM A X 5957/M A X 5958Triple PCI Express, Hot-Plug Controllers 10______________________________________________________________________________________Typical Operating Characteristics (continued)(V 12VIN = V 12S_+= 12V, V 3.3S_+= V 3.3S_-= V 3.3AUXIN = V ON_= V AUXON_= V FON_= 3.3V, PWRGD_= FAULT_= PORADJ = TIM =OUTPUT_ = OPEN, INPUT_ = PRES-DET_= PGND = GND. See the Typical Application Circuit .)PRESENT-DETECT (ON/OFF) OPERATIONMAX5957 toc354ms/div 12V OUTPUT VOLTAGEPWRGD_ 3.3V OUTPUT VOLTAGE PRES-DET_10V/div5V/div 5V/div5V/divFORCED-ON (ON/OFF) OPERATIONMAX5957 toc3640ms/div12V OUTPUT VOLTAGEPWRGD_3.3V AUXO_OUTPUT VOLTAGE FON_10V/div5V/div 5V/div5V/divFORCED-ON (ON/OFF) OPERATIONMAX5957 toc374ms/div 12V OUTPUT VOLTAGEPWRGD_3.3V OUTPUT VOLTAGE FON_10V/div5V/div 5V/div5V/divDEBOUNCED INPUT/OUTPUT OPERATIONMAX5957 toc38INPUT_2V/div10ms/divOUTPUT_2V/divPOWER-ON-RESET TIME vs. PORADJ RESISTORM A X 5957 t o c 39R PORADJ (k Ω)t P O R _H L (m s )90080060070020030040050010020040060080010001200140016001800200022002400001000t FAULT TIME DELAY vs. TIM RESISTORM A X 5957 t o c 40R TIM (k Ω)t F A U L T (m s )8006002004002040608010012014016018020001000MAX5957/MAX5958Triple PCI Express, Hot-Plug ControllersM A X 5957/M A X 5958Triple PCI Express, Hot-Plug ControllersMAX5957/MAX5958Triple PCI Express, Hot-Plug ControllersDetailed DescriptionThe MAX5957/MAX5958 triple hot-plug controllers are designed for PCIe applications. The devices provide hot-plug control for 12V, 3.3V, and 3.3V auxiliary sup-plies for three PCIe slots. The MAX5957/MAX5958s’logic inputs/outputs allow interfacing directly with the system hot-plug-management controller or through an SMBus with an external I/O expander. An integrated debounced attention switch and present-detect signals are included to simplify system design (Figure 1).MOSF ETs to control the 12V and 3.3V main outputs.The 3.3V auxiliary outputs are controlled through inter-nal 0.2Ωn-channel MOSF ETs. Internal charge pumps provide a gate drive for the 12V outputs while the gate drive of the 3.3V output is driven by the 12V input sup-ply. The 3.3V auxiliary outputs are completely indepen-dent from the main outputs with their own charge pumps.M A X 5957/M A X 5958Triple PCI Express, Hot-Plug ControllersMAX5957/MAX5958Triple PCI Express, Hot-Plug ControllersAt power-up, the MAX5957/MAX5958 keep all the external MOSFETs off until all supplies rise above their respective UVLO thresholds. These devices keep the internal MOSF ETs off only until the 3.3VAUXIN supply rises above its UVLO threshold. Upon a turn-on com-mand, the MAX5957/MAX5958 enhance the external and internal MOSFETs slowly with a constant gate cur-rent to limit the power-supply inrush current. The MAX5957/MAX5958 actively limit the current of all out-puts at all times and shut down the corresponding channel if an overcurrent condition persists for longer than a resistor-programmable overcurrent timeout (see the Fault Management section). Thermal protection cir-cuitry also shuts down all outputs if the die temperature exceeds +150°C. After an overcurrent or overtempera-ture fault condition, the MAX5957/MAX5958 latch off or automatically restart after a restart time delay.The power requirement for PCIe connectors is defined by the PCIe card specification and summarized in Table 1.StartupThe main supply outputs can become active only after all the following events have occurred:•V 3.3AUXIN is above its UVLO threshold.•V 12VIN and V 3.3SA+are both above their UVLO threshold.•ON_ is driven high.•PRES-DET_is low for more than 4ms.The auxiliary supply output is made available only after the following events have occurred:•V 3.3AUXIN is above its UVLO threshold.•AUXON_ is driven high.•PRES-DET_is low for more than 4ms.The FON_input overrides all other control signals and turns on the respective slot when driven low, as long as the UVLO thresholds have been reached. Table 2 sum-marizes the logic conditions required for startup. The aux-iliary supply input powers the internal control logic and analog references of the MAX5957/MAX5958, so the main supplies cannot be enabled, if V 3.3VAUXIN is not present.When an output is enabled, a programmable startup timer (t SU ) begins to count the startup time duration.The value of t SU is set to 2x the fault timeout period (t FAULT ). R TIM externally connected from TIM to GND sets the duration of t FAULT .M A X 5957/M A X 5958Triple PCI Express, Hot-Plug Controllers Table 2. Control Logic Truth TableFigure 2. Power-Up Timing, No FaultFigure 3. 12V Power-Up Timing (Turn-On into Output Overcurrent/Short Circuit)MAX5957/MAX5958Triple PCI Express, Hot-Plug Controllers12V and 3.3V Outputs Normal OperationThe MAX5957/MAX5958 monitor and actively limit the current of the 12V and 3.3V outputs after the startup period. Each output has its own overcurrent threshold.If any of the monitored output currents rise above the overcurrent threshold for a period t FAULT , FAULT_asserts and the controller disengages both the 12V and 3.3V outputs for the particular slot (see the Fault Management section).3.3V Auxiliary Output Normal OperationThe auxiliary output current is internally monitored and actively limited to the maximum current-limit value. An overcurrent fault condition occurs when the output cur-rent exceeds the overcurrent threshold for longer than t FAULT . A fault on an auxiliary channel causes all sup-plies of the affected channel to be disabled after a pro-grammable time period t FAULT .A fault condition on a main channel (V 12VIN or V 3.3VIN )causes all the channel’s main outputs to shut down after the t FAULT period and then either latch off or auto-matically restart after the t RESTART (t RESTART = 64 x t FAUALT ) period, depending on the device version. Afault on any of the channel’s main outputs does not affect the auxiliary channel (V 3.3AUXIN ).Power-Good (PWRGD_)Power-good (PWRGD_) is an open-drain output that pulls low a time (t POR_HL ) after all the outputs of the respective slot are fully on. All outputs are considered fully on when 3.3G_ has risen to V PGTH3.3, 12G_ has risen to V PGTH12, and V 3.3AUXO_is less than V PGTH3.3AUX . t POR_HL is adjustable from 2.4ms to 1.5s by connecting a resistor from PORADJ to GND. See the Setting the Power-On Reset and Timeout Period (t POR_HL )sections. Connect PORADJ to GND to com-pletely skip the POR time delay for PWRGD_assertion.Thermal ShutdownWhen the die temperature goes above (T SD ) +150°C, an overtemperature fault occurs and the MAX5957/MAX5958 shut down all outputs. The devices wait for the junction temperature to decrease below T SD - hysteresis before entering fault management (see the Fault Management section).Fault ManagementA fault occurs when an overcurrent or 12G_ or 3.3G_below the power-good threshold lasts longer than t FAULT or when the device experiences an overtemper-ature condition:• A fault on a main output (12V or 3.3V) shuts down both main outputs of the respective slot. The 3.3V auxiliary is not affected.• A fault on the 3.3V auxiliary output shuts down all three outputs of the respective slot.The MAX5957A/MAX5958A automatically restart from a fault shutdown after the t RESTART period while the MAX5957L/MAX5958L latch off. If an overcurrent fault occurred on a main output, bring ON_ low for at least t RESET (100µs) and high again to reset the fault and restart the outputs. If the overcurrent fault occurred on an auxiliary output or an overtemperature fault occurred, bring both ON_ and AUXON_ low for a mini-mum of t RESET to reset the fault. Toggle ON_ or only AUXON_ to reset the fault condition. If ON_ and AUXON are toggled before t RESTART time counting has elapsed, the MAX5957L/MAX5958L store the informa-tion and restart when the delay is finished. The MAX5957A/MAX5958A (autoretry versions) restart all channels automatically after t RESTART .Figure 4. 12 Output Overcurrent/Short Circuit During Normal OperationM A X 5957/M A X 5958Triple PCI Express, Hot-Plug Controllers Debounced Logic Gate (INPUT_ and OUTPUT_)INPUT1, INPUT2, and INPUT3 accept inputs from mechanical switches. The corresponding outputs are OUTPUT1, OUTPUT2, and OUTPUT3. OUTPUT_ is debounced for 4ms. When INPUT_ goes from high to low, OUTPUT_ goes low immediately and stays low for at least 4ms. After the debounce time, OUTPUT_ fol-lows INPUT_. If INPUT_ goes from low to high, OUT-PUT_ goes high immediately and stays high for at least 4ms. After the debounce time, OUTPUT_ follows INPUT_. Figure 5 shows the timing diagram describing the INPUT_/OUTPUT_ debounced feature.Present-Detect and Forced-On Inputs(PRES-DET_, FON_)PRES-DET_input detects the PRSNT#2 pin on a PCIe connector. When the card is plugged in, PRES-DET_goes low and allows the turn-on of the outputs of the respective slot after a 4ms debounced time. When the card is removed, an internal 50k Ωpullup resistor forces PRES-DET_high and the respective slot is shut down with no delay. PRES-DET_works in conjunction with ON_ and AUXON_ and only enables the device when ON_ and AUXON_ are high.A logic-low on FON_forces the respective slot (main supplies and auxiliary) to turn on regardless of the sta-tus of the other logic inputs, provided the UVLO thresh-olds are exceeded on all the inputs.Active Current LimitsActive current limits are provided for all three outputs of the three slots (slot A, slot B, and slot C). Connect a current-sense resistor between 12S_+ and 12S_- to set the current limit for the 12V outputs. The current limit is set to 54mV / R SENSE12. Connect a current-sense resis-tor between 3.3S_+ and 3.3S_- to set the current limit for the 3.3V main outputs to 20mV / R SENSE3.3. For the auxiliary output (3.3VAUXO_) the current limit is fixed at 450mA in the MAX5957 and 700mA in the case of the MAX5958.When the voltage across R SENSE12 or R SENSE3.3reaches the current-limit threshold voltage, the MAX5957/MAX5958 regulate the gate voltage to main-tain the current-limit threshold voltage across the sense resistor. If the current limit lasts for t FAULT , then an overcurrent fault occurs. The MAX5957/MAX5958 shut down both the 12V and 3.3V outputs and assert the FAULT_output of the respective slot.When the auxiliary output reaches the current limit for longer than t FAULT , a fault occurs and the device shuts down all outputs and asserts FAULT of the respective slot.UVLO ThresholdThe UVLO thresholds prevent the internal auxiliary MOSF ETs and the external main channel MOSF ETs from turning on if V 12VIN , V 3.3VIN , and V 3.3VAUXIN are not present. Internal comparators monitor the main supplies and the auxiliary supply and keep the gate-drive outputs (12GA, 12GB, 12GC, 3.3GA, 3.3GB, and 3.3GC) low until the supplies rise above their UVLO threshold. The 12V main supply is monitored at 12VIN and has a UVLO threshold of 10V. The 3.3V main sup-ply is monitored at 3.3SA+ and has a UVLO threshold of 2.65V. The auxiliary supply is monitored at 3.3AUXIN and has a 2.65V UVLO threshold. For either main channels to operate, V3.3AUXIN must be above its UVLO threshold.Figure 5. INPUT_ and OUTPUT_ Debounced FeatureMAX5957/MAX5958Triple PCI Express, Hot-Plug ControllersFigure 6. Fault Management FlowchartM A X 5957/M A X 5958Triple PCI Express, Hot-Plug Controllers External MOSFET Gate Drivers(12G_ and 3.3G_)The gate drive for the external MOSFETs is provided at 12GA, 12GB, 12GC, 3.3GA, 3.3GB, and 3.3GC. 12G_is the gate drive for the 12V main supply and is boost-ed to 5.3V above V 12VIN by its internal charge pump.During turn-on, 12G_ sources 5µA into the external gate capacitance to control the turn-on time of the external MOSF ET. During turn-off, 12G_ sinks 150µA from the external gate capacitance to quickly turn off the external MOSF ET. During short-circuit events, an internal 120mA current sink activates to rapidly bring the load current into the regulation limits.3.3G_ is the gate drive for the 3.3V main supply’s MOS-FET and is driven to 5.5V above the 3.3V main supply.The power for 3.3G_ is supplied from 12VIN and has no internal charge pump. During turn-on, 3.3G_ sources 5µA into the external gate capacitance to control the turn-on time of the external MOSF ET. During turn-off,3.3G_ sinks 150mA to quickly turn off the external MOSF ET. During short-circuit events, an internal 120mA current sink activates to rapidly turn off the appropriate external MOSFET.Auxiliary Supply (3.3VAUXIN)3.3VAUXIN provides power to the auxiliary outputs as well as the internal logic and references. The drains of the internal auxiliary MOSF ETs connect to 3.3AUXIN through internal sense resistors and the sources con-nect to the auxiliary outputs (3.3VAUXO_). Both MOSF ETs have typical on-resistance of 0.2Ω. Each channel’s internal charge pump boosts the gate-drive voltage to fully turn on the internal n-channel MOSFETs.The auxiliary supplies have an internal current limit set to 450mA (MAX5957), 700mA (MAX5958).Applications InformationSetting the Power-On Resett FAULT is the time an overcurrent or overtemperature fault must remain for the MAX5957/MAX5958 to disable the main or auxiliary channels of a particular slot.Program the fault timeout period (t FAULT ) by connect-ing a resistor (R TIM ) from TIM to GND. t FAULT can be calculated by the following equation:t FAULT = (166ns / Ω) x R TIMThe t FAULT programmed time duration must be chosen according to the total capacitance load connected to the 12G_ and 3.3G_ pins. To properly power up the main supply outputs, the following constraints need to be taken:t SU ≥(V GATE x C LOAD ) / I CHG where t SU = 2 x t FAULT and where:•I CHG = 5µA.•V GATE = 4.8V + V 12VIN for 12G_ and V GATE = 6.8V + V 3.3VIN for 3.3G_.•C LOAD is the total capacitance load at the gate.Maximum and minimum values for R TIM are 500Ωand 500k Ω, respectively. Leave TIM floating for a default t FAULT of 10ms.Timeout Period (t POR_HL )t POR_HL is the time from when the gate voltages of all outputs of a slot reach their power-good threshold to when PWRGD_pulls low. Program the POR timeout period (t POR ) by connecting a resistor (R PORADJ ) from PORADJ to GND. t POR_HL can be calculated by the fol-lowing equation:t POR_HL = (2.5µs / Ω) x R PORADJMaximum and minimum values for R PORADJ are 500Ωand 500k Ω, respectively. Leave PORADJ floating for a default t POR of 150ms. Connect PORADJ to GND in order to completely skip the power-on delay time prior to the PWRGD_assertion.Component SelectionSelect the external n-channel MOSFET according to the applications current requirement. Limit the switch power dissipation by choosing a MOSF ET with an R DS_ON low enough to have a minimum voltage drop at full load. High R DS_ON causes larger output ripple if there are pulsed loads. High R DS_ON can also trigger an external undervoltage fault at full load. Determine the MOSF ET’s power-rating requirement to accommo-date a short-circuit condition on the board during start-up. Table 3 lists the MOSF ETs and sense resistor manufacturers.。

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。

FREDFET Power MOS 7 低损耗高电压N型增强模电源MOSFET数据手册说明书

050-7040 R e v D 4-2006MAXIMUM RATINGSAll Ratings: TC = 25°C unless otherwise specified.APT10078BFLL APT10078SFLL1000V14A0.780ΩPower MOS 7®is a new generation of low loss, high voltage, N-Channel enhancement mode power MOSFETS. Both conduction and switchinglosses are addressed with Power MOS 7®by significantly lowering R DS(ON)and Qg . Power MOS 7®combines lower conduction and switching losses along with exceptionally fast switching speeds inherent with APT's patented metal gate structure.Characteristic / Test ConditionsDrain-Source Breakdown Voltage (V GS = 0V, I D = 250µA)Drain-Source On-State Resistance 2 (V GS = 10V, I D = 7A)Zero Gate Voltage Drain Current (V DS = 1000V, V GS = 0V)Zero Gate Voltage Drain Current (V DS = 800V, V GS = 0V, T C = 125°C)Gate-Source Leakage Current (V GS = ±30V, V DS = 0V)Gate Threshold Voltage (V DS = V GS , I D = 1mA)Symbol V DSS I D I DM V GS V GSM P D T J ,T STG T L I AR E AR E ASParameterDrain-Source VoltageContinuous Drain Current @ T C= 25°C Pulsed Drain Current1Gate-Source Voltage Continuous Gate-Source Voltage Transient Total Power Dissipation @ T C = 25°C Linear Derating FactorOperating and Storage Junction Temperature Range Lead Temperature: 0.063" from Case for 10 Sec.Avalanche Current 1 (Repetitive and Non-Repetitive)Repetitive Avalanche Energy 1Single Pulse Avalanche Energy4UNIT Volts AmpsVolts Watts W/°C °C Amps mJSTATIC ELECTRICAL CHARACTERISTICSSymbol BV DSS R DS(on)I DSS I GSS V GS(th)UNIT VoltsOhms µA nA VoltsMINTYPMAX10000.7802501000±10035APT10078BFLL_SFLL10001456±30±404033.23-55 to 15030014301300CAUTION: These Devices are Sensitive to Electrostatic Discharge. Proper Handling Procedures Should Be Followed.APT Website - •Lower Input Capacitance •Increased Power Dissipation •Lower Miller Capacitance •Easier To Drive•Lower Gate Charge, Qg3050-7040 R e v D 4-2006DYNAMIC CHARACTERISTICSAPT10078BFLL_SFLLSOURCE-DRAIN DIODE RATINGS AND CHARACTERISTICSTHERMAL CHARACTERISTICSCharacteristic / Test Conditions Continuous Source Current (Body Diode)Pulsed Source Current 1 (Body Diode)Diode Forward Voltage 2 (V GS = 0V, I S = I D -14A)Peak Diode Recovery dv /dt 5Reverse Recovery Time (I S = I D -14A, di /dt = 100A/µs)Reverse Recovery Charge (I S = I D -14A, di /dt = 100A/µs)Peak Recovery Current (I S = I D -14A, di /dt = 100A/µs)Symbol I S I SM V SDdv /dtt rr Q rr I RRMUNIT Amps Volts V/ns ns µC AmpsMINTYPMAX14561.318T j = 25°C 210T j = 125°C 710T j = 25°C 1.0T j = 125°C 3.6T j = 25°C 9.8T j = 125°C14Symbol R θJC R θJAMINTYPMAX0.3140UNIT °C/WCharacteristic Junction to Case Junction to AmbientSymbol C iss C oss C rss Q g Q gs Q gd t d(on)t r td(off)t f E on E off E on E off Characteristic Input Capacitance Output CapacitanceReverse Transfer Capacitance Total Gate Charge 3Gate-Source Charge Gate-Drain ("Miller") Charge Turn-on Delay Time Rise TimeTurn-off Delay Time Fall TimeTurn-on Switching Energy 6Turn-off Switching Energy Turn-on Switching Energy 6Turn-off Switching Energy Test ConditionsV GS = 0VV DS = 25V f = 1 MHz V GS = 10VV DD = 500VI D = 14A @ 25°C RESISTIVE SWITCHINGV GS = 15VV DD = 500V I D = 14A @ 25°CR G = 1.6ΩINDUCTIVE SWITCHING @ 25°CV DD = 667V V GS = 15V I D = 14A, R G = 3ΩINDUCTIVE SWITCHING @ 125°CV DD = 667V V GS = 15V I D = 14A, R G = 3ΩMIN TYP MAX 252543075951260983093557574095UNIT pFnCnsµJ1Repetitive Rating: Pulse width limited by maximum junction temperature2Pulse Test: Pulse width < 380 µs, Duty Cycle < 2%3See MIL-STD-750 Method 34714Starting T j = +25°C, L = 13.27mH, R G = 25Ω, Peak I L = 14A5dv /dt numbers reflect the limitations of the test circuit rather than the device itself. I S ≤ I D -14A di /dt ≤ 700A/µsV R ≤ 1000T J ≤ 150°C 6 Eon includes diode reverse recovery. See figures 18, 20.APT Reserves the right to change, without notice, the specifications and inforation contained herein.Z θJ C , T H E R M A L I M P E D A N C E (°C /W )RECTANGULAR PULSE DURATION (SECONDS)FIGURE 1, MAXIMUM EFFECTIVE TRANSIENT THERMAL IMPEDANCE, JUNCTION-TO-CASE vs PULSE DURATION0.350.300.250.200.150.100.050050-7040 R e v D 4-2006APT10078BFLL_SFLLTypical Performance CurvesR D S (O N ), D R A I N -T O -S O U R C E O N R E S I S T A N C E I D , D R A I N C U R R E N T (A M P E R E S )I D , D R A I N C U R R E N T (A M P E R E S )(N O R M A L I Z E D )V G S (T H ), T H R E S H O L D V O L T A G E B V D S S , D R A I N -T O -S O U R C E B R E A K D O W N R D S (O N ), D R A I N -T O -S O U R C E O N R E S I S T A N C EI D , D R A I N C U R R E N T (A M P E R E S )(N O R M A L I Z E D )V O L T A G E (N O R M A L I Z E D )V DS , DRAIN-TO-SOURCE VOLTAGE (VOLTS)FIGURE 2, TRANSIENT THERMAL IMPEDANCE MODELFIGURE 3, LOW VOLTAGE OUTPUT CHARACTERISTICS V GS , GATE-TO-SOURCE VOLTAGE (VOLTS)I D , DRAIN CURRENT (AMPERES)FIGURE 4, TRANSFER CHARACTERISTICSFIGURE 5, R DS (ON) vs DRAIN CURRENTT C , CASE TEMPERATURE (°C)T J , JUNCTION TEMPERATURE (°C)FIGURE 6, MAXIMUM DRAIN CURRENT vs CASE TEMPERATURE FIGURE 7, BREAKDOWN VOLTAGE vs TEMPERATURE T J , JUNCTION TEMPERATURE (°C)T C , CASE TEMPERATURE (°C)FIGURE 8, ON-RESISTANCE vs. TEMPERATURE FIGURE 9, THRESHOLD VOLTAGE vs TEMPERATURE0.00295F0.0114F0.174FJunction temp. (°C)RC MODELCase temperature. (°050-7040 R e v D 4-2006V DS , DRAIN-TO-SOURCE VOLTAGE (VOLTS)V DS , DRAIN-TO-SOURCE VOLTAGE (VOLTS)FIGURE 10, MAXIMUM SAFE OPERATING AREAFIGURE 11, CAPACITANCE vs DRAIN-TO-SOURCE VOLTAGEQ g , TOTAL GATE CHARGE (nC)V SD , SOURCE-TO-DRAIN VOLTAGE (VOLTS)FIGURE 12, GATE CHARGES vs GATE-TO-SOURCE VOLTAGEFIGURE 13, SOURCE-DRAIN DIODE FORWARD VOLTAGEV G S , G A T E-T O -S O U R C E V O L T A G E (V O L T S )I D, D R A I N C U R R E N T (A M P E R E S )I D R , R E V E R S E D R A I N C U R R E N T(A M P E R E S )C , C A P A C I T A N C E (p F )I D (A)I D (A)FIGURE 14, DELAY TIMES vs CURRENTFIGURE 15, RISE AND FALL TIMES vs CURRENT I D (A)R G , GATE RESISTANCE (Ohms)FIGURE 16, SWITCHING ENERGY vs CURRENTFIGURE 17, SWITCHING ENERGY VS. GATE RESISTANCES W I T C H I N G E N E R G Y (µJ )t d (o n ) a n d t d (o f f ) (n s )S W I T C H I N G E N E R G Y (µJ )t r a n d t f (n s )050-7040 R e v D 4-2006APT10078BFLL_SFLLAPT’s products are covered by one or more of U.S.patents 4,895,810 5,045,903 5,089,434 5,182,234 5,019,5225,262,336 6,503,786 5,256,583 4,748,103 5,283,202 5,231,474 5,434,095 5,528,058 and foreign patents. US and Foreign patents pending. All Rights Reserved.Dimensions in Millimeters and (Inches)TO -247 Package OutlineDimensions in Millimeters (Inches)and Leads are PlatedD 3PAK Package OutlineFigure 18, Turn-on Switching Waveforms and Definitions Figure 19, Turn-off Switching Waveforms and DefinitionsI C APT15DF100V CEV DD GSwitching EnergyDrain CurrentDrain VoltageGate VoltageT J125°C 10%0t d(off)90%t f90%Drain CurrentDrain VoltageGate VoltageT J 125°CSwitching Energy10%t d(on)90%5%t r5%10%。

SN75107BD 数据手册说明书

PART NO. SN75107BD
SN75107AJ SN75107BJ SN75108AJ SN75108BD SN75108BJ SN75108BN SN75109AJ
SN75109J
SN75109N
SN7510FA SN7510FA SN7510FA SN7510FA SN7510L SN7510L SN7510L SN7510P SN7510P SN7510P SN7511FA
N/A
IC Datasheets -
/SN7510L-datasheet.html
Shortform
Texas Instruments
Differential Video Amplifier
/SN7510L-datasheet.html
Advanced Micro Devices
Differential DriverTransmitter - ConstantCurrent Output
/SN75109N-datasheet.html
Texas Instruments
General Purpose Video Amplifier
Shortform
Texas Instruments
Differential Video Amplifier
/SN7510P-datasheet.html
Texas Instruments
General Purpose Video Amplifier
Differential Video Amplifier
/SN7510FA-datasheet.html
Texas Instruments
General Purpose Video Amplifier

MAXIM MAX8725 说明书

____________________________________概述MAX8725评估板(EV kit) 是高精度、高效率的多化学类型电池充电器。

该评估板能够以高达3A的电流为三至四节串联的锂离子电池(Li+) 充电。

充电电流和输入电源电流通过板上电位器调节。

输出电压可设置为4.2V x 电池包中串联电池节数。

串联电池节数由跳线选择。

通过安装两个电阻，输出电压可在4V至4.4V x (串联电池节数)之间调节。

该评估板还提供用于监视AC适配器电流的输出，并可监视是否连接了AC适配器。

MAX8725通过控制两个外部p沟道MOSFET自动选择系统供电电源。

决定选择哪一路电源供电的依据是：是否连接了AC适配器。

____________________________________特性♦输入限流♦利用内部基准提供±0.5%的电压检测精度♦自动选择系统电源♦模拟输入控制充电电流和充电电压♦监视输出AC适配器电源电流AC适配器是否接通♦电池电压高达17.6V ♦+8V至+25V输入电压♦电池充电电流高达3A♦可为Li+、NiCd和NiMH电池充电♦表贴封装♦经过完全安装和测试评估板：MAX8725MAX8725评估板Maxim Integrated Products 119-0292; Rev 0; 5/05本文是Maxim正式英文资料的译文，Maxim不对翻译中存在的差异或由此产生的错误负责。

请注意译文中可能存在文字组织或翻译错误，如需确认任何词语的准确性，请参考Maxim提供的英文版资料。

索取免费样品和最新版的数据资料，请访问Maxim的主页：。

评估板：M A X 8725MAX8725评估板2_______________________________________________________________________________________评估板：MAX8725MAX8725评估板_______________________________________________________________________________________3________________________________快速入门所需设备在开始评估之前，需要准备以下设备：•为充电器提供输入电流的DC电源，该电源电压必须大于电池电压设置点，并具有足够大的额定电流•电压表•电池包或负载步骤MAX8725评估板是经过完全安装与测试的表贴电路板。

PC585中文说明书

安装说明PC585软件2.3版本DLS-1V6.5或以上·警告·此说明包括有关产品使用和功能方面的限制信息，还包括制造商的责任权限信息。

请完整、仔细地阅读说明PC585控制箱布线图第一章系统介绍1.1详细说明下装软件支持◆PC585用DLS—1 V6.5及以上软件灵活的防区设置◆4个全可编程防区；用键盘防区输入口和无线防区系统可扩展到8防区◆38个访问码：5个用户码、1个保养码、2个劫持码、2个监测码和32个一般访问码◆27个防区类型：8种可编程防区属性常闭，单线尾和双线尾防区布线◆使用PC5132无线接收机可用8个无线防区音频报警输出◆100mA监察院测警铃输出（电流额定值是3安培），12VDC ◆PGM1=300mA; PGM2=50mA供应1.5Amp的标准电源◆550mA辅助电源，12VDC◆正温度系数（PTC）元件代替熔线◆监测交流电告电池的丢失◆内部时钟锁到交流电频率所需电源◆变压器=16.5VAC，1.5VA◆电池=最小12V，4Ah充电密封铅电池遥控键盘详细说明◆可用3不同的键盘：—PC1555RKZ带防区输入的8防区LED键盘—PC5508Z带防区输入的8防区LED键盘—LCD5500Z带防区输入的字母数字键盘◆所有键盘有5个全可编程功能键◆连接多达8个键盘◆4线连接到总线◆内置压电蜂鸣器数字通信器详细说明◆支持包括SIA和Contact ID的主格式◆事件通知个人传呼机◆3个可编程电话号码◆2个户号◆支持LINKS 1000通信格式◆支持LINKS2X50长距离无线电传送器◆DTMF和脉冲拨号◆抗干扰功能◆可选择报告可传输到不同的电话系统监测性能PC585能够持续监控许多可能发生的故障：◆交流电故障◆防区故障◆防区防拆◆火警故障◆电话线路故障◆通信故障◆电池低电压◆警铃输出故障◆模块故障（监测或内部时钟丢失）◆辅助电源供应故障◆预防误报的功能◆退出失败音频提示◆通信延时◆进入延时的紧急情况◆快速退出◆交叉防区盗警报警◆旋转按键缓冲附加性能◆在指定时间自动设防◆键盘触以报警输出和通信器测试◆所有模块可通过一条4线总线与系统连接，模块和主控制箱距离可达1000’/330米◆事件记忆缓冲可记录128个事件及事件民生的事件和日期；用PC5400串行接口模块可以打印事件记忆缓冲，或可用LCD5500Z键盘进行查看。

587B062中文资料

587B062thru587B302240V AC POWER LINE SURGE SUPPRESSOROnly One Name Means ProTek’Tion™05047APPLICA TIONS✔ Hard Wired Equipment AC Power Protection✔ Load Side Distribution Systems✔ Secondary Protection for Light Industrial AC Power IEC COMPA TIBILITY (EN61000-4)✔ 61000-4-5 (Surge): 1kA, 8/20µs - Level 4(Line-Line)FEA TURES✔ Meets ANSI/IEEE C62.41 Requirements ✔ Listed to CSA, File LR65240✔ Differential Mode Protection ✔ Low Clamping Voltage✔ Nanosecond Response Time ✔ Long Life and Maintenance FreeMECHANICAL CHARACTERISTICS✔ Plastic Package✔ Weight: 485 Grams (Approximate)✔ Flammability Rating UL 94V-0✔ Device Marking: Part Number, Date Code, Logo, Voltage and Current Rating DESCRIPTIONThe 587B Series of 240 Volt AC Surge Suppressors is designed for use by the OEM,equipment installer and or maintenance contractor. These modules employ a three stage technology proven to be the most cost effective and reliable method in protect-ing sensitive electronic equipment from over voltage transients.This series is designed to protect AC powered equipment from the 6,000 volt peak open circuit voltage and 3,000 Amp short circuit current as defined in ANSI/IEEE C62.41, Category C1.The 587B Series offers a high degree of protection against 240 VAC EMI line noise. It is ideal for protecting 800 Volt components because the solid state TVS technology assures that the line-to-neutral voltage will not exceed 800 Volts. While the modules are designed for transient voltage protection, the advanced circuitry will also attenuate the amplitude and slow the rate of rise of high frequency noise acting as an EMI filter.The 587B Series includes differential mode protection, which is effective in reducing interference from line to equipment and are effective in reducing equipment gener-ated noise to meet FCC, VDE and CSA interference requirements.U.S PA TENT 4,563,7200 10 20 30 40 50 600 10 20 30 40 50 60FIGURE 2TYPICAL CLAMPING ACTIONOF A 16 AMP MODULEK i l o v o l t s Time - µs264FIGURE 1TRANSIENT VOLTAGE T HREATCONDITIONK i l o v o l t sTime - µs2486Figures 1 and 2 are photographs of digitized waveforms showing the typical clamping action of a 16 ampere module.A 12 Ohm resistor is used to represent a 10 Amp equipment load. The load is then subjected to the ANSI/IEEE C62.41Category CI test conditions (6,000V/3,000A). These photo-graphs contrast the effect on equipment with and without the protector.587B062thru587B302DEVICE CHARACTERISTICSARRESTER DEFINITIONSClamping Voltage: The clamping voltage of an arrester is the voltage that appears across its terminals during conduction of a transient current.Standard Wave Form: The waveform of a surge current or voltage is designated by a combination of two numbers. The first number is for the time of the wave front expressed in microseconds from zero to the peak of the wave. The second number is for the time of the wavetail also expressed in microseconds from zero to the instant that the wavetail reaches one half of the crest or peak value, i.e., 8/20 µs waveform.Transient Current: The transient current of an arrestor is the peak surge current which flows through the arrester when voltage clamping occurs.OPERA TIONFor maximum effectiveness, the protector should be installed directly after the AC line on/off switch and fuse. This will protect the electronics from the AC line switch arcing and the severe transients caused by a fuse clearing.Some heat is produced when operating at full current load, and heat sinking may be required to maintain case temperature below 85°C. The case temperature is measured at the center of the mounting surface. The unit should not be mounted to a low combusting temperature material such as wood.High energy transients will cause a large circulating current in the AC input line (2,500A is possible). To prevent electromagnetic coupling, the AC line on the input side of the protector must be dressed away from other wiring, magnetic shielding may be required. In addition, the electrical service must be connected to a low impedance earth ground.FILTER CHARACTERISTICS (Noise Attenuation dB)MAXIMUM RATINGSSPECIFICA TIONS @ 25°CRESPONSE TO TRANSIENT VOLT AGESCLAMPINGTEST CONDITIONDIFFERENTIAL (Line-to-Neutral)Operating Line Voltage:Maximum Line Current:Transient Voltage:Transient Current:Current Leakage:Line-to-Neutral:Storage & Operating Temperature:(Measured at center ofmounting surface)240 VAC +10%587B062: 6A587B162: 16A 587B302: 30A6000V peak 3000A peak@ 240 VAC 1.0mA -40°C to 85°CPROTECTIONMODE MAXIMUM CLAMPING VOLTAGE OPEN CIRCUIT VOLTAGE @ 1.2/50 µsSHORT CIRCUITCURRENT @ 8/20 µsFrequency (MHz)Differential Mode Attenuation0.15300.5551.0555.05510503045800V6000V3000A587B062thru587B302COPYRIGHT © ProTek Devic es 2003SPECIFICATIONS: ProTek reserves the right to change the electrical and or mechanical characteristics described herein without notice (except JEDEC).DESIGN CHANGES: ProTek reserves the right to discontinue product lines without notice, and that the final judgement concerning selection and specifications is the buyer’s and that in furnishing engineering and technical assistance,ProTek assumes no responsibility with respect to the selection or specifications of such products.P ACKAGE OUTLINE & DIMENSIONSProTek Devices2929 South Fair Lane, T empe, AZ 85282Tel: 602-431-8101 Fax: 602-431-2288E-Mail: sales@ Web Site: 0.169”PROTEK P ART NUMBERCASE (INCHES)CASE (CENTIMETERS)APPROX.WEIGHT IN GRAMSTERMINAL THREADS587B62587B162587B302A 333B 333C 3.53.53.5D 3.853.853.85E 1.51.51.5F 0.60.60.6A 7.627.627.62B 7.627.627.62C 8.898.898.89D 10.1610.1610.16E 3.813.813.81F 1.521.521.52750750750M5M5M5。

MAX12557

1引言MAX12557是Maxim公司开发的一款高速、低功耗、高性能的14位模/数转换器。

该模/数转换器具有完全差分的双通道带宽采样保持（T/H）输入端，采样速率为65MS/s，输入带宽为750MHz，还具有很好的动态特性，在输入信号频率为70MHz/175MHz时，输出信噪比为74.1dB/72.5dB，无杂散动态范围为83.4dBc。

MAX12557由3.3V的单电源供电，简化了外部供电电路的设计。

满量程模拟输入幅度范围为±0.35V－±1.15V，用于数字输出的电压输入范围为1.7V－3.6V，易与不同的逻辑电平接口。

该电路的功耗低，在输入频率为175MHz、传输信噪比为72.5dB时，功耗仅为610mW；支持单端或差分输入时钟，时钟具有用户可选的2分频（DIV2）和4分频（DIV4）模式，应用设计更灵活，并有助于减小时钟抖动的负面影响。

与同类电路相比，MAX12557采用了更小巧的68引脚QFN－EP 小尺寸封装（10mm×10mm×0.8mm），正常工作温度范围为－40℃－＋85℃。

MAX12557可广泛应用在要求低功耗的数据采集、I/O接收器、数字机顶盒、便携式仪表、超声和医学成像，以及蜂窝通信、LMDS、点到点微波通信、MMDS、HFC、WLAN的中频与基带通信接收器等领域。

2引脚排列及功能MAX12557的引脚排列如图1所示。

各个引脚的功能如下所述：GND（1，4，5，9，13，14，17）是接地参考点。

VDD（23－26，61，62，63）是模拟电源输入。

将VDD接在3.15V－3.60V的供电电源上，并通过由1只10μF以上的电容器和1只0.1μF电容器组成的并联旁路与地相连。

OVDD（27，43，60）是输出驱动电源输入。

将OVDD接在1.7V－VDD的供电电源上，并通过由1只10μF以上的电容器和1只0.1μF电容器组成的并联旁路与地相连。

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MAX5877
Ordering Information
PART MAX5877EGK-D MAX5877EGK+D TEMP RANGE -40°C to +85°C -40°C to +85°C PINPACKAGE 68 QFN-EP* 68 QFN-EP* PKG CODE G6800-4 G6800-4
AVDD1.8
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at .
MAX5877
43 42 41 40 39 38 37 36 35
AVDD1.8
GND
OUTQP
GND
GND
GND
GND
OUTQN
OUTIN
DACREF
AVDD3.3
AVDD3.3
OUTIP
AVDD3.3
AVDD3.3
GND
QFN
________________________________________________________________ Maxim Integrated Products
元器件交易网
19-3632; Rev 2; 3/07
KIT ATION EVALU E L B AVAILA
14-Bit, 250Msps, High-Dynamic-Performance, Dual DAC with LVDS Inputs
General Description
68
67 66 65 64
63 62 61 60 59 58
57 56 55 54 53 52 51 50 49 48 47 46 45 44
B2N B1P B1N B0P B0N N.C. N.C. N.C. N.C. GND DVDD3.3 GND GND AVDD3.3 GND REFIO FSADJ
*EP = Exposed pad. + = Lead-free package. D = Dry pack.
Pin Configuration
DVDD1.8
Base Stations: Single/Multicarrier UMTS, CDMA, GSM Communications: Fixed Broadband Wireless Access, Point-to-Point Microwave Direct Digital Synthesis (DDS) Cable Modem Termination Systems (CMTS) Automated Test Equipment (ATE) Instrumentation
B10P B11N B11P B12N B12P B13N B13P SELIQN SELIQP XORP XORN PD TORB CLKP CLKN GND AVCLK
Selector Guide
PART MAX5873 MAX5874 MAX5875 MAX5876 MAX5877 MAX5878 RESOLUTION (BITS) 12 14 16 12 140 200 250 250 250 LOGIC INPUTS CMOS CMOS CMOS LVDS LVDS LVDS
Features
♦ 250Msps Output Update Rate ♦ Noise Spectral Density = -160dBFS/Hz at fOUT = 16MHz ♦ Excellent SFDR and IMD Performance SFDR = 75dBc at fOUT = 16MHz (to Nyquist) SFDR = 71dBc at fOUT = 80MHz (to Nyquist) IMD = -87dBc at fOUT = 10MHz IMD = -73dBc at fOUT = 80MHz ♦ ACLR = 75dB at fOUT = 61MHz ♦ 2mA to 20mA Full-Scale Output Current ♦ LVDS-Compatible Digital and Clock Inputs ♦ On-Chip +1.20V Bandgap Reference ♦ Low 287mW Power Dissipation ♦ Compact 68-Pin QFN-EP Package (10mm x 10mm) ♦ Evaluation Kit Available (MAX5878EVKIT)
The MAX5877 is an advanced 14-bit, 250Msps, dual digital-to-analog converter (DAC). This DAC meets the demanding performance requirements of signal synthesis applications found in wireless base stations and other communications applications. Operating from +3.3V and +1.8V supplies, this dual DAC offers exceptional dynamic performance such as 75dBc spurious-free dynamic range (SFDR) at fOUT = 16MHz and supports update rates of 250Msps, with a power dissipation of only 287mW. The MAX5877 utilizes a current-steering architecture that supports a 2mA to 20mA full-scale output current range, and allows a 0.1VP-P to 1VP-P differential output voltage swing. The device features an integrated +1.2V bandgap reference and control amplifier to ensure high-accuracy and low-noise performance. A separate reference input (REFIO) allows for the use of an external reference source for optimum flexibility and improved gain accuracy. The clock inputs of the MAX5877 accept both LVDS and LVPECL-compatible voltage levels. The device features an interleaved data input that allows a single LVDS bus to support both DACs. The MAX5877 is available in a 68-pin QFN package with an exposed pad (EP) and is specified for the extended temperature range (-40°C to +85°C). Refer to the MAX5876 and MAX5878 data sheets for pin-compatible 12-bit and 16-bit versions of the MAX5877, respectively. Refer to the MAX5874 data sheet for a CMOS-compatible version of the MAX5877.
Note 1: Thermal resistance based on a multilayer board with 4 x 4 via array in exposed paddle area.
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.
B10N
B3N
B4N
B5N
B6N
B7N
B8N
B9N
B2P
B3P
B4P
B5P
B6P
B7P
B8P
B9P
Applications
TOP VIEW
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34
元器件交易网
14-Bit, 250Msps, High-Dynamic-Performance, Dual DAC with LVDS Inputs MAX5877