As for your good AMP AD8330,
Your datasheet page-3 show as
"Full-Scale Input, when VDBS=0V, and differential drive, min.±1.4V."
So can I use by the input signal 1.0V-3.5V (peak to peak) biased 2.5V center?
We will amplify this to 0.5V-4.0V.
I think that it is OK if I adjust the gain by Vmag and Vdbs, correct??
Also I note fig-49 on page-16 your datasheet for this incident.