https://devzone.nordicsemi.com/f/nordic-q-a/64980/nrf52820-layoutDear 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 onen-USTelligent Community 13Wed, 19 Aug 2020 12:19:03 GMThttps://devzone.nordicsemi.com/thread/265306?ContentTypeID=1Wed, 19 Aug 2020 12:19:03 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0c7b6497-9933-474e-af8e-8fd9ea19e673ketiljo<p>For all the 8 dBm radios, it&#39;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&nbsp; 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.&nbsp;</p> <p></p><div style="clear:both;"></div>