In the evaluation schematic i see that the AVcc and the Vdrive is from the same power source (as opposed to the typical connection diagram in the part datasheet).
Is it recommended or should i use an isolator for the power supply ?
On the AD7606 evaluation board, the AVDD and Vdrive have the same source ADP7104, this is fine as long as the source is capable of sourcing even with these loads. But if in the case Vdrive needs to be lower, like 3.3V, this is to interface directly to micrconntroller which usually at 3.3V logic, the two needs to have separate power source. The AD7606 can still work without the isolator, but in case the application has a potential to go overvoltage or some noise including some spikes, that could potentially damage other circuit, it is better an isolator be present.
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