I am evaluating the AD7747 for a grounded capacitive sensor application. I am unsure what is the function of the Cap Gain Calibration.
From what I think it is used to increase the sensitivity of the sensor say if the range of my sensor is from 0 - 2pF then by adjusting the Cap Gain Calibration I could obtain larger sensitivity? I have tried using this feature in the software but the results do not seem to corroborate my theory!
Any insight welcome.