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
Manufacturer Part NumberDescriptionAmplifier TypeNumber of CircuitsAvailable QuantityBuy Now
AD8603AUJZ-REEL7IC OPAMP GP 400KHZ RRO TSOT23-5General Purpose18518 - Immediate
201000 - Factory Stock
ADG738BRUZIC MUX/DEMUX 8X1 16TSSOPMultiplexer/Demultiplexer1 x 8:12910 - Immediate
ADUM5401ARWZDGTL ISO 2.5KV GEN PURP 16SOICMagnetic CouplingGeneral Purpose1981 - Immediate
AD7193BRUZIC ADC 24BIT SPI 4.8K 28-TSSOP24-680 - Immediate
ADUM5401CRWZDGTL ISO 2.5KV GEN PURP 16SOICMagnetic CouplingGeneral Purpose1338 - Immediate
611 - Factory Stock
ADR3440ARJZ-R2IC VREF SERIES 4.096V SOT23-6SeriesFixed1500 - Immediate
2500 - Factory Stock
ADUM1280BRZDGTL ISO 3KV 2CH GEN PURP 8SOICMagnetic CouplingGeneral Purpose279 - Immediate
8134 - Factory Stock
ADT7310TRZSENSOR TEMPERATURE SPI 8SOICDigital, Local-55°C ~ 150°C630 - Immediate
AD5201BRMZ10IC DGTL POT 10K 33POS 10-MSOPLinearPotentiometer631 - Immediate
EVAL-CN0287-SDPZEVAL BOARD 4-CH TEMP MEASUREMENT-SPI2 - Immediate
91 - Factory Stock
EVAL-SDP-CB1ZBOARD EVALUATION FOR SDP-CB1SDP (System Demonstration Platform) 132 - Factory Stock
ADUM1280CRZDGTL ISO 3KV 2CH GEN PURP 8SOICMagnetic CouplingGeneral Purpose0
ADUM1280ARZDGTL ISO 3KV 2CH GEN PURP 8SOICMagnetic CouplingGeneral Purpose0
AD7193BCPZIC ADC 24BIT SPI 4.8KHZ 32LFCSP24-16 - Immediate
180 - Factory Stock
EVAL-AD7193EBZEVAL BOARD FOR AD719324-3 - Immediate
ADG702BRMZIC SWITCH SPST 8MSOPSwitch1 x SPST - NC12 - Immediate
13600 - Factory Stock
Published: 2014-01-15