ADUM4190 design question

Hi Sir,

I have question regarding to ADUM4190.

There is two schematic by ADUM4190 and use 5V with VCC_P and P+5V.

Up one of schematic use OPA in ADUM4190 as voltage follower, Can I supply 3.3V to Gen_V for +IN than get output 3.3V from EAout?

Below one of schematic, can I use the OPA in ADUM4190 be Gain = 11 function? if so, what maximum Gain limit is for the OPA in ADUM4190? 

Joe

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