Sheri,
Of the two ADCs you reference, I think the ADS7864 may be a better fit for uPP based on the signal descriptions. However, you will probably need additional logic to make this work since both ADCs seem to require additional control signals that…
Couple of quick things Akash,
1. Where is your DC bias current path for the V+ inputs to the op amps?
2. This differential I/O op amp circuit sometimes has a common mode oscillation - probably not here, but we did see that in the OPA838 decomp device…
