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ADR3440 数据表(PDF) 1 Page - Analog Devices |
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ADR3440 数据表(HTML) 1 Page - Analog Devices |
1 / 9 page Circuit Note CN-0287 Circuits from the Lab® reference designs are engineered and tested for quick and easysystemintegrationto helpsolve today’s analog, mixed-signal, and RF design challenges. For more informationand/orsupport, visitwww.analog.com/CN0287. Devices Connected/Referenced AD7193 4-Channel, 4.8 kHz, Ultralow Noise, 24-Bit Sigma-Delta ADC with PGA ADT7310 ±0.5°C Accurate, 16-Bit Digital SPI Temperature Sensor AD8603 Precision Micropower, Low Noise CMOS R-to-R Input/Output Operational Amplifiers ADR3440 4.096 V, Micropower High Accuracy Voltage Reference ADG738 CMOS, Low Voltage, 3-Wire Serially- Controlled, Matrix Switch ADG702 CMOS Low Voltage 2 Ω SPST Switch AD5201 33-Position Digital Potentiometer ADuM1280 3 kV RMS Dual Channel Digital Isolators ADuM5401 Quad-Channel, 2.5 kV Isolators with Integrated DC-to-DC Converter Isolated 4-Channel, Thermocouple/RTD Temperature Measurement System with 0.5°C Accuracy Rev. C CircuitsfromtheLab®referencedesignsfromAnalogDeviceshavebeendesignedandbuiltbyAnalog Devices engineers. Standard engineering practices have been employed in the design and constructionofeachcircuit,andtheirfunctionandperformancehavebeentestedandverifiedinalab environment at room temperature. However, you are solely responsible for testing the circuit and determiningitssuitabilityandapplicabilityforyouruseandapplication.Accordingly,innoeventshall AnalogDevicesbeliablefordirect,indirect,special,incidental,consequentialorpunitivedamagesdue toanycausewhatsoeverconnectedtotheuseofanyCircuitsfromtheLabcircuits. (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 ©2013–2014 Analog Devices, Inc. All rights reserved. EVALUATION AND DESIGN SUPPORT Circuit Evaluation Boards CN-0287 Circuit Evaluation Board (EVAL-CN0287-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 is a completely isolated 4-channel temperature measurement circuit optimized for performance, input flexibility, robustness, and low cost. It supports all types of thermocouples with cold junction compensation and any type of RTD (resistance temperature detector) with resistances up to 4 kΩ for 2-, 3-, or 4-wire connection configurations. The RTD excitation current are is programmable for optimum noise and linearity performance. RTD measurements achieve 0.1°C accuracy (typical), and Type-K thermocouple measurements achieve 0.05°C typical accuracy because of the 16-bit ADT7310 digital temperature sensor used for cold-junction compensation. The circuit uses a four-channel AD7193 24-bit sigma-delta ADC with on-chip PGA for high accuracy and low noise. Input transient and overvoltage protection are provided by low leakage transient voltage supressors (TVS) and Schottky diodes. The SPI-compatible digital inputs and outputs are isolated (2500 V rms), and the circuit is operated on a fully isolated power supply. |
类似零件编号 - ADR3440 |
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类似说明 - ADR3440 |
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