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Altera_Forum
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10 years ago

Enpirion EN5322QI: AGND/PGND

Hello Members, I have some questions about the PCB-design for EN5322QI: I planning to have a PCB with EN5322QI and EN6310QI. The board will have one complete GND-plane (Layer2). 1) PG...
Altera_Forum's avatar
Altera_Forum
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10 years ago

Thanks for your explanations a_x_h_75!

a_x_h_75: The datasheet is simply guiding you to ensure input/output caps are close to the controller by offering PGND pins close to the input/output power pins

=> For me that was not written clearly in the datasheet ;)

a_x_h_75: AGND will connect to your ground plane through a single via.

=> This is not mentioned anywhere in the datasheet! The only comment in the datasheet is: EN5322QI => AGND: Analog Ground for the Controller Circuit || EN6310QI => AGND: Quit analog ground for control circuits. Connect to system ground plane.

a_x_h_75: Finally, follow the layout recommendations in each datasheet. I'd suggest this is (pretty much) all covered there.

=> The correct connection between PGND(GND) and AGND is not mentioned in both datasheets :/