I'm now on evaluating an EVB of ADuCM350 with BIO3Z board.
I used default HW connection and some changed SW setting as attached file.
For the BIO3Z board,
Inserted LK7/8/9 and LK10, LK16/17/18 and LK19 on position B to measure R23 + R24//R26 = 1.5k ohm
- 4-wire isolated, Tx via AFE8, Rx via AFE7, Rcal = 1k, Rtia = 1k, In-Am Gain = 1.412
- Vpeak = 10mV, Freq. Sweep from 25kHz to 50kHz with 1kHz step.
- Ideal Impedance R1 = 1.5k ohms
with these settins, click "GO" and wait the status LED turned off
Then, click "Plot" and clock plot again at plot window with Impedance Mag. vs Freq selection.
Sometimes, I got very low impedance magnitude value as attached plot results(page 2, with 41kHz frequency).
Can I get some helps on this low value result ?