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 NumberDescriptionAvailable Quantity
AD8603AUJZ-REEL7 datasheet linkIC OPAMP GP 400KHZ RRO TSOT23-5AD8603AUJZ-REEL7IC OPAMP GP 400KHZ RRO TSOT23-516117 - Immediate
AD8603AUJZ-REEL7 product page link
ADR3440ARJZ-R2 datasheet linkIC VREF SERIES 4.096V SOT23-6ADR3440ARJZ-R2IC VREF SERIES 4.096V SOT23-61833 - Immediate
3750 - Factory Stock
ADR3440ARJZ-R2 product page link
ADT7310TRZ datasheet linkSENSOR TEMPERATURE SPI 8SOICADT7310TRZSENSOR TEMPERATURE SPI 8SOIC218 - Immediate
ADT7310TRZ product page link
ADG738BRUZ datasheet linkIC MUX/DEMUX 8X1 16TSSOPADG738BRUZIC MUX/DEMUX 8X1 16TSSOP5820 - Immediate
2400 - Factory Stock
ADG738BRUZ product page link
ADUM5401ARWZ datasheet linkDGTL ISO 2.5KV GEN PURP 16SOICADUM5401ARWZDGTL ISO 2.5KV GEN PURP 16SOIC4073 - Immediate
ADUM5401ARWZ product page link
AD7193BRUZ datasheet linkIC ADC 24BIT SPI 4.8K 28-TSSOPAD7193BRUZIC ADC 24BIT SPI 4.8K 28-TSSOP136 - Immediate
AD7193BRUZ product page link
AD7193BCPZ datasheet linkIC ADC 24BIT SPI 4.8KHZ 32LFCSPAD7193BCPZIC ADC 24BIT SPI 4.8KHZ 32LFCSP386 - Immediate
AD7193BCPZ product page link
ADUM5401CRWZ datasheet linkDGTL ISO 2.5KV GEN PURP 16SOICADUM5401CRWZDGTL ISO 2.5KV GEN PURP 16SOIC845 - Immediate
ADUM5401CRWZ product page link
ADUM1280ARZ datasheet linkDGTL ISO 3KV 2CH GEN PURP 8SOICADUM1280ARZDGTL ISO 3KV 2CH GEN PURP 8SOIC1444 - Immediate
ADUM1280ARZ product page link
ADUM1280CRZ datasheet linkDGTL ISO 3KV 2CH GEN PURP 8SOICADUM1280CRZDGTL ISO 3KV 2CH GEN PURP 8SOIC615 - Immediate
25186 - Factory Stock
ADUM1280CRZ product page link
ADUM1280BRZ datasheet linkDGTL ISO 3KV 2CH GEN PURP 8SOICADUM1280BRZDGTL ISO 3KV 2CH GEN PURP 8SOIC518 - Immediate
ADUM1280BRZ product page link
EVAL-SDP-CB1Z datasheet linkBOARD EVALUATION FOR SDP-CB1EVAL-SDP-CB1ZBOARD EVALUATION FOR SDP-CB15 - Immediate
192 - Factory Stock
EVAL-SDP-CB1Z product page link
ADG702BRMZ datasheet linkIC SWITCH SPST 8MSOPADG702BRMZIC SWITCH SPST 8MSOP364 - Immediate
9050 - Factory Stock
ADG702BRMZ product page link
EVAL-CN0287-SDPZ datasheet linkEVAL BOARD 4-CH TEMP MEASUREMENTEVAL-CN0287-SDPZEVAL BOARD 4-CH TEMP MEASUREMENT5 - Immediate
10 - Factory Stock
EVAL-CN0287-SDPZ product page link
EVAL-AD7193EBZ datasheet linkEVAL BOARD FOR AD7193EVAL-AD7193EBZEVAL BOARD FOR AD71935 - Immediate
32 - Factory Stock
EVAL-AD7193EBZ product page link
AD5201BRMZ10 datasheet linkIC DGTL POT 10K 33POS 10-MSOPAD5201BRMZ10IC DGTL POT 10K 33POS 10-MSOP3 - Immediate
AD5201BRMZ10 product page link
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Published: 2014-01-15