I am using AD8421, with gain 991 and input filter R=2k, Cc=1nF, Cd=100nF.
Where is the best place to put inputs to ground for offset calibration (cmos switch)
- close to input pins or in front of filter resistors
Apologies for the delay of response. If you are going to use a mux or switches to short the inputs to ground for offset calibration, it is better to do it before the 2k resistor (filter resistor). Just remember that it will take time to settle before you can get a stable offset to calibrate out.
Let me know if you need anything else.
Retrieving data ...