TMDSCNCD28377D & 4 motor 4 DRV8303 isolation recommendation?

Hi.

I am wondering if there are any recommended hardware isolation to connect the

TMDSCNCD28377D & 4 - DRV8303 to drive 4 motors?.

I looked at the evaluation boards schematics but I did not find a clear answer.

I am considering Isolating the

1) digital PWMs

2) analog current sense

3) and power current circuits

Which to use galvanic isolation?

Which to share GND ?

any other consideration you could help me with...

Is it engulf to keep good pcb separation for all 3 types of voltages?

Thank you,

David.

P.S. I asked similar question without getting replies from TI's experienced experts.

So I would be very thankful if you could refer this question to them.