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ADUCM350 current measurement 4-wire configuration

Question asked by CDiego on Feb 13, 2018
Latest reply on Feb 25, 2018 by NeoXu



I would like to know if its possible to measure the current going through the unknown impedance.


I'm using a normal 4 wire configuration (i.e. non-bioimpedance measurements), and I can successfully measure the impedance, but I would also like to know the current going through or the voltage across the impedance.


The user manual mentions a calibration routine for current measurement through TIA, but it says that it needs a current source. I've seen the example of the 4-wire Bio measurements and I assume that it's measuring the current through the TIA but this is considering the external AD8226.


Do I require external circuitry to get this extra information?