Is there an application circuit of AD8372 for single ended (both input and output) case?
We have not developed or tested an application circuit for single-ended operation. I would suggest ac-coupling INC1 to ground. Alternatively, you could try putting a 75 ohm resistor in series with the ac-coupling cap on INC1
On the output put the same load on the unused output (i.e. a dummy load) as you have on the used output.