nRF5340-CLAA PCB Guidelines

[rikhard]

Hi,

Is there any PCB guidelines and/or supplemental information about PCB layout regarding *-CLAA package? 

CLAA AVSS pins, should any of the power supplies be decoupled to AVSS instead of the ground plane?

Is the following somehow valid also for *-CLAA package as mentioned here regarding QKAA: https://infocenter.nordicsemi.com/pdf/nRF5340_PS_v1.3.pdf, "Note: Pay attention to how the capacitor C1 is grounded. It is not directly connected to the ground plane, but grounded via pin J31 and to the VSS die pad. This is done to create additional filtering of harmonic components." 

Thanks!

[ketiljo]

Is there any PCB guidelines and/or supplemental information about PCB layout regarding *-CLAA package? 

There's no special guidelines for the CLAA package that does only apply for this. 

CLAA AVSS pins, should any of the power supplies be decoupled to AVSS instead of the ground plane?

No, all VSS pins must be connected to the ground plane. 

Is the following somehow valid also for *-CLAA package as mentioned here regarding

This is only for QKAA.

[rikhard]

Thanks.