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AD7171 データシート(PDF) 1 Page - Analog Devices |
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AD7171 データシート(HTML) 1 Page - Analog Devices |
1 / 5 page Circuit Note CN-0188 Circuits from the Lab™ reference circuits are engineered and testedfor quickandeasysystemintegrationtohelpsolvetoday’s analog, mixed-signal, and RF design challenges. For more informationand/orsupport,visitwww.analog.com/CN0188. Devices Connected/Referenced ADA4051-2 Micropower, Zero-Drift, Rail-to-Rail Input and Output, Dual Op Amp AD7171 Low Power, 16-Bit, Sigma-Delta ADC ADR381 2.5 V, Low Noise, High Accuracy, Band Gap Voltage Reference ADuM5402 Quad-Channel Isolator with Integrated DC-to-DC Converter Low Cost, Level Shifted Low Side Current Monitor for Negative High Voltage Rails Rev. B CircuitsfromtheLab™circuitsfromAnalogDeviceshavebeendesignedandbuiltbyAnalogDevices engineers. Standard engineering practices have been employed in the design and construction of eachcircuit,andtheirfunctionandperformancehavebeentestedandverifiedinalabenvironmentat room temperature. However, you are solely responsible for testing the circuit and determining its suitabilityandapplicabilityforyouruseandapplication.Accordingly,innoeventshallAnalogDevices be liable for direct, indirect, special, incidental, consequential or punitive damages due to any cause whatsoeverconnectedtotheuseofanyCircuitsfromtheLabcircuits. (Continuedonlastpage) One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2011 Analog Devices, Inc. All rights reserved. EVALUATION AND DESIGN SUPPORT Circuit Evaluation Boards CN-0188 Circuit Evaluation Board (EVAL-CN0188-SDPZ) System Demonstration Platform (EVAL-SDP-CB1Z) Design and Integration Files Schematics, Layout Files, Bill of Materials CIRCUIT FUNCTION AND BENEFITS The circuit shown in Figure 1 monitors current in individual channels of −48 V to better than 1% accuracy. The load current passes through a shunt resistor, which is external to the circuit. The shunt resistor value is chosen so that the shunt voltage is approximately 50 mV at maximum load current. Figure 1. Low Side Current Monitor for Negative High Voltage Rails (All Connections and Decoupling Not Shown) SCLK PDRST DOUT VDD GND REFIN(+) AIN+ AIN GNDISO GNDISO GNDISO +3.3VISO ADR381 VIN VOUT GND LOAD SOURCE + 48V + – VSHUNT RSHUNT ILOAD AD7171 D1 5.6V R2 1k 1% R4 1k 1% 48.7k , 1% R1 24.9k U1A U1B U1: ADA4051-2 Q1 +2.5V D2 R7 4.99k 1% R5 4.99k 1% R6 1k D1: MMSZ5232B-7-F D2: MBRA120ET3 Q1: ZXMN7A11GTA, 70V N-CH MOSFET 0.1µF REFIN(–) R3 0.1µF 10µF VOA VIA VOB VIC VOC VIB VDD1 GND1 GNDISO GND1 GNDISO VISO +3.3V ADuM5402 NOTE: OPTIONAL ADuM5402 PROVIDES GALVANIC ISOLATION FOR DIGITAL SIGNALS AND ISOLATED POWER FOR CIRCUIT |
同様の部品番号 - AD7171 |
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同様の説明 - AD7171 |
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