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I'm new to ADuCM350, just ordered eval board. Maybe can answer my own question when it shows up BUT here goes:

Is it possible to measure a lower range of bio impedance, say around 400 ohms and 80 nF, with the eval board.   This would be for internal cardiac impedance, measured from inside atria to a large external ground pad attached to the back.  Would this be possible with a 2-wire measurement?    (Note that we don't need absolute accuracy, relative is fine as long as its repeatable).    What kind of resolution can we expect?    If we add IEC 60601 isolation capacitors, will the relative accuracy and resolution be significantly compromised here?