CN0287 4-Channel Temperature Measurement Circuit

ADI's CN0287 is a completely isolated, 4-channel thermocouple/RTD temperature measurement circuit with 0.5° accuracy

Image of Analog Devices' CN0287 4-Channel Temperature Measurement Circuit Analog Devices' CN0287 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 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. Low leakage transient voltage suppressors (TVS) and Schottky diodes provide input transient and overvoltage protection. The SPI-compatible digital inputs and outputs are isolated (2500 VRMS), and the circuit is operated on a fully isolated power supply. Evaluate this circuit using the EVAL-CN0287-SDPZ circuit board and the SDP-B (EVAL-SDP-CB1Z) system demonstration platform controller board. The two boards have 120-pin mating connectors, allowing for the quick setup and evaluation of the performance of the circuit. The EVAL-CN0287-SDPZ board contains the circuit to be evaluated and the SDP-B controller board is used with the CN0287 evaluation software to capture the data from the EVAL-CN0287-SDPZ circuit board.

Isolated 4-Channel, Thermocouple/RTD Temperature Measurement System

CN0287 4-Channel Temperature Measurement Circuit
ImageManufacturer Part NumberDescriptionAmplifier TypeNumber of CircuitsAvailable QuantityBuy Now
IC OPAMP GP 400KHZ RRO TSOT23-5AD8603AUJZ-REEL7IC OPAMP GP 400KHZ RRO TSOT23-5General Purpose12404 - Immediate
IC MUX/DEMUX 8X1 16TSSOPADG738BRUZIC MUX/DEMUX 8X1 16TSSOPMultiplexer/Demultiplexer1 x 8:13390 - Immediate
DGTL ISO 2.5KV GEN PURP 16SOICADUM5401ARWZDGTL ISO 2.5KV GEN PURP 16SOICMagnetic CouplingGeneral Purpose2886 - Immediate
IC ADC 24BIT SPI 4.8K 28-TSSOPAD7193BRUZIC ADC 24BIT SPI 4.8K 28-TSSOP24-596 - Immediate
DGTL ISO 2.5KV GEN PURP 16SOICADUM5401CRWZDGTL ISO 2.5KV GEN PURP 16SOICMagnetic CouplingGeneral Purpose1068 - Immediate
IC VREF SERIES 4.096V SOT23-6ADR3440ARJZ-R2IC VREF SERIES 4.096V SOT23-6SeriesFixed617 - Immediate
1500 - Factory Stock
DGTL ISO 3KV 2CH GEN PURP 8SOICADUM1280BRZDGTL ISO 3KV 2CH GEN PURP 8SOICMagnetic CouplingGeneral Purpose1050 - Immediate
35378 - Factory Stock
DGTL ISO 3KV 2CH GEN PURP 8SOICADUM1280CRZDGTL ISO 3KV 2CH GEN PURP 8SOICMagnetic CouplingGeneral Purpose973 - Immediate
10878 - Factory Stock
SENSOR TEMPERATURE SPI 8SOICADT7310TRZSENSOR TEMPERATURE SPI 8SOICDigital, Local-55°C ~ 150°C1375 - Immediate
BOARD EVALUATION FOR SDP-CB1EVAL-SDP-CB1ZBOARD EVALUATION FOR SDP-CB1SDP (System Demonstration Platform) 5 - Immediate
IC SWITCH SPST 8MSOPADG702BRMZIC SWITCH SPST 8MSOPSwitch1 x SPST - NC962 - Immediate
12650 - Factory Stock
IC DGTL POT 10K 33POS 10-MSOPAD5201BRMZ10IC DGTL POT 10K 33POS 10-MSOPLinearPotentiometer631 - Immediate
EVAL BOARD 4-CH TEMP MEASUREMENTEVAL-CN0287-SDPZEVAL BOARD 4-CH TEMP MEASUREMENT-SPI2 - Immediate
85 - Factory Stock
EVAL BOARD FOR AD7193EVAL-AD7193EBZEVAL BOARD FOR AD719324-5 - Immediate
15 - Factory Stock
DGTL ISO 3KV 2CH GEN PURP 8SOICADUM1280ARZDGTL ISO 3KV 2CH GEN PURP 8SOICMagnetic CouplingGeneral Purpose0
IC ADC 24BIT SPI 4.8KHZ 32LFCSPAD7193BCPZIC ADC 24BIT SPI 4.8KHZ 32LFCSP24-292 - Factory Stock
Published: 2014-01-15