I'm measuring 4 differential analog input with an AD7175-8 at a frequency of 100Hz.
To do so I set the AD7175 in single conversion mode, configure and activate the 4 analog channels and start a new measurement with a frequency of 100Hz.
Everything work fine but I saw a strange behaviour when changing the configuration of the AD converter. Indeed, although my analog signals are constants and there is a small offset difference when changing the filter type (sync5 + sync1 / sync3), the filter size or passing from the single conversion mode to the continuous one. Those offsets are not big (2000 - 3000 ticks out of the 24 bits range), but I don't understand them. I thought those filter where completely digital and it should not change the offset of the signals measured.
Thanks for your help