Yes, my input should be 0-5.1V.
The ADC I have found is ADS821. It has differential input with common mode reference point.
It would be good to have differential input, but not a must.
The the input of ADS821 is 0.25V-4.25V, so the signal must be…
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…