Isolated 4-Channel, Thermocouple/RTD Temperature Measurement System with 0.5°C Accuracy

November 06, 2013 // By Analog Devices

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.
ADI, Analog Devices, RTD, Temperature Measurement, 4-channel