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[AD7793] Single thermistor cold-junction compensation for multiple 7793s?

Question asked by zarikoff on Aug 12, 2015
Latest reply on Aug 25, 2015 by jcolao

Is it feasible to use a single thermistor for ambient compensation into two separate 7793s?

 

Configuration would be: IOUT2 connects from one of the 7793s to the thermocouple, while AIN2(+), AIN2(-), REFIN(+), and REFIN(-) are paralleled between each 7793 to the thermistor and reference resistor.

 

Has anyone tried such an arrangement, and would the parallel loading on the AIN/REFIN pins cause additional measurable offset in the measurements?

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