Clarification on nRF52820 Reference Schematics and Layout

RE: Clarification on nRF52820 Reference Schematics and Layout

prabhakar kumar — Thu, 20 Aug 2020 07:11:33 GMT

Thanks a lot!

RE: Clarification on nRF52820 Reference Schematics and Layout

Kaja — Thu, 20 Aug 2020 06:58:56 GMT

Hi,

[quote user="prabhakar kumar"]Could you please let me know the DC-DC switching frequency?[/quote]

- 8 MHz

Best regards,
Kaja

RE: Clarification on nRF52820 Reference Schematics and Layout

prabhakar kumar — Thu, 20 Aug 2020 06:10:42 GMT

Hello Kaja,

Thanks for the reply.

Could you please let me know the DC-DC switching frequency?

Thanks

RE: Clarification on nRF52820 Reference Schematics and Layout

Kaja — Wed, 19 Aug 2020 12:57:16 GMT

Hi,

1. Could you elaborate what you mean here?
Here is the layer stack:

2. The correct is to attach L3 closes to pin 39. L3 is needed for the internal regulator to function properly, and L4 is used as an RF choke, to reject noise from entering the radio. These need to be 10 µH and 15 nH respectively. This has been verified through simulations during chip design and internal testing.

There is no separate development kit for the nRF52820 chip. Projects for nRF52820 can be developed on the nRF52833 DK.

Best regards,
Kaja