Customer is asking the following question. Please share your experience :
"We are trying to find a reliable way to manage signal Gnd return between a very wide bandwidth T & H and AD9234, through use of Grounded CPWs. AD9234 has Pwr-S-S-Pwr arrangement of input lines, where we usually rely on Gnd-S-S-Gnd to preserve signal integrity at high frequency. ADI’s pin arrangement can be more problematic if the source signal is delivered by a part with VDD that is different from 3.3V on AD9234 – Pwr and Gnd are both AC-ground and Pwr can be used for high-frequency ground return, but when AC-ground at one line end is at a different potential than at the at the other line end, we cannot easily preserve a uniform low-resistance return path for the sampled signal. A non-uniform Gnd return induces signal distortion.
Has ADI investigated this issue at all, and if so, what is the recommended way to preserve signal ground return?"