Now I consider to use AD7745 for capacitance sensor and have a question below about the datasheet.
Q.1:About the "ppm of FS/°C" for "Gain Drift vs. Temperature" on page 3, What is the value of F/S, is that 8.192pF or 4.096pF ?
Q.2:About the "ppm of FS/°C" for "Drift vs. Temperature" on page 3,
The value of F/S is setup value of CAPDAC? or full range of CAPDAC which is 21pF?
Q.3:When I compare the maximum value and minimum value of above, the sign is converse like below.
"Gain Drift vs. Temperature": -28 to -24 ppm of FS/°C
"Drift vs. Temperature": +24 to +28 ppm of FS/°C
What kind of relation between these parameter?
Is there any case that if the CAPDAC was setup some value, temperature drift is cancelled ?