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AD9361 digital and analog connection problem

Question asked by zhousong1987 on Jan 11, 2018
Latest reply on Jan 12, 2018 by Vinod

In the official document of AD9361 :
"Analog Ground. Tie these pins directly to the VSSD digital ground on the printed circuit board (one ground plane)"
"Digital Ground. Tie these pins directly to the VSSA analog ground on the printed circuit board (one ground plane)."

The representation of digital and analog is connected to a ground plane。

 

But there are other articles, such as "a puzzle that implements data converter's grounding and unraveling" AGND "and" DGND "from ADI Chinese Forum, but it suggests" separating digitally and analogue ".

 

My doubts are, "what is the reason for 9361 without separate grounding? "  Or  "why 9361 does not need to be grounded alone?" 

 

Thanks

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