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TPSM84624: agnd and pgnd connection

Part Number: TPSM84624

So separating the AGND and PGND connection.  Is the intent that the ground for the pins/parts that connect to AGND to get their ground connection through the part an the AGND ground never has an off chip connection to the rest of the system ground?  In other words on our CCA there is a AGND "island" that is floating from PGND which is tied to the ground on the rest of the cca.