Let's assume I have an AD-converter that expects a differential signal with zero common mode voltage and I want to connect a single ended signal source.
If the AD has it's own isolated ground, couldn't I just use a voltage divider to drive the AD ground to the center of the signal? In fact, since the AD already has the same impedance to ground on both input lines internally, shouldn't this happen 'automatically' even without an external divider? (I actually tried this, it didn't work)
Since I don't see this kind of interfacing anywhere if I look up single ended to differential conversion, I assume my understanding of the matter is a bit naive.
What would be a robust and simple way to connect a single ended signal (can be static) to a differential AD with zero common mode?