Hello,
I've developed a measurement circuit with the AFE4300 Chip. Unfortunately, I have a problem with the impedance measurement. When I connect a 100 ohm resistor to the AFE4300 I get a frequency dependening behavior of an ohmic resistor (see attached). I measured in FWR mode and used a sample rate of 860SPS. I noticed that even the evaluation board shows this frequency-dependening behavior.
Is there a mistake in my circuit or is there a possibility to correct the impedance measurment? Thanks!