I have a signal with 2.6Vpp and centered around 1.3V(VCM) and a DC voltage 1.3V(VCM).
Now, I want to fetch these two source into LTC2389-16 or AD7622 to have a differential bipolar AD conversion and remove common mode noise.
And I have some question about LTC2389-16 and AD7622 common mode input specification when the differential bipolar input are used.
1. Can I use LTC2389-16 to do so with internal reference only(DC1826A-E) because I found that VIN- is refined to 0.5*VREF(2.048V)+-0.1V?
2. Can I use AD7622 to do so with internal reference only(EVAL-AD76XXCBZ)? I don't find any VIN- specification when using differential bipolar input type