AD7616 is SE or differential/difference ?
If it is really SE input, where is defined allowed voltage input range for analog ground input ? Datasheet says only about +/-21V on analog inputs. From pictures it looks like difference/differential amplifier on front of analog input. If it is really SE I assume that common mode voltage on input ( ground input ) is limited to certain range. What is allowed on ground pin ? +/-0.1V ? More ? Less ? Please make datasheet more specyfic otherway it is confusing.
I am trying to use AD7616 in project where I have differences about +/-0.1V between input grounds. Will it work this way ?