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Temperature measurement circuit using 5-channel low-power programmable sensor signal processor AD7714 and thermocouple

Published on Jan 05 2011 // Power Measurement Circuits

 Temperature measurement circuit using 5-channel low-power programmable sensor signal processor AD7714 and thermocouple

Posed by the AD7714 and the thermocouple temperature measurement circuit as shown. In this application, AD7714 operating in buffered mode, allowing the former termination decoupling capacitors to filter out the noise on the thermocouple leads. In buffered mode, AD7714 narrow common-mode range for differential thermocouple voltage is appropriate within the common-mode voltage range, AD7714’s AIN2 inputs should be biased to 2.5V reference voltage.