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4-wire measurement and stray capacitance

Question asked by CDiego on Dec 5, 2017
Latest reply on Dec 5, 2017 by mark.ramos



I'm planning to use the ADuCM350 to take multiple impedance measurements across an array of sensors. Ideally my sensors would represent just a resistance. However, since I'm planning to use a MOS multiplexer, I was wondering: Would the MUX stray capacitance have a significant impact on the AFE?


Since I read that the 4-wire measurement works only without isolation capacitors, I'm not certain if it's a good idea to use a MOS multiplexer or a relay array.


Thanks in advance!