How isolated does SnGND need to be for the T4160?

[anneweng]

If I connect SnGND directly to system ground will there be any problems? Would it be okay if I connected it through a ferrite bead? The datasheet makes several references to SnGND making me think it needs to be separate from system ground.

[LPP · Accepted solution]

Connect SnGND to common ground. Do not use ferrite beds to isolate SnGND.

However: "There needs to be dedicated analog ground, AGND_SDn_PLLn for each AVDD_SDn_PLLn pin up to the physical local of the filters themselves."

Have a great day,
Pavel

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