NRF52820 layout

[Gokhun Selcuk]

Dear Sir/Madam,

As a  BLE solution in our products one of the candidate ICs is NRF52820. Our current PCB is a 2 layer one. But the reference design for NRF52820 is 4 -layer, although it has no traces in inner layers. Is it advised to use NRF52820 on 2-layer PCBs or are there some prohibitive degradation in terms of performance?

Regards  

[ketiljo]

For all the 8 dBm radios, it's strongly recommended to use a 4 layer board for proper grounding. You can get away with a 2 layer board, but you need to make  the bottom layer (under and around the chip) is free of any tracks and only have ground plane, and possibly also not use the 8 dBm mode.