RE: nRF5340 DECA / DECN Pins (Bypassing)

sanderson — Thu, 23 Sep 2021 13:19:13 GMT

This is perfect. Thank you!!

RE: nRF5340 DECA / DECN Pins (Bypassing)

JONATHAN LL — Thu, 23 Sep 2021 12:25:03 GMT

Hi Scott, update time!

Capacitors on DECA, DECD, DECN, DECR/DECRF are decoupling on the output of the regulators, both LDO's and switching regulators.

[quote user=""]Lastly -- the 2.2nF capacitor on the DECR/DECRF node. Is that intended to be located as close as possible to the DECRF pin?[/quote]

Yes the 2.2nF capacitor should be mounted close to the DECRF pin.

[quote user=""]Due to derating of the small package sizes, I was going to use a 2.2uF/0201 part there but wanted to know if there are any minimum/maximum capacitance requirements for the DECA pin.[/quote]

The 2.2uF seems indeed to be a good choice, so this is ok.

We do have a withe paper Power Supply Decoupling Capacitor Selection (nordicsemi.com) that you might be interested in.

Note: We also do HW reviews and give feedback so if that is something you want then you can create a private ticket and call it HW review request nRFXXX.

Regards,
Jonathan

RE: nRF5340 DECA / DECN Pins (Bypassing)

JONATHAN LL — Thu, 16 Sep 2021 09:20:12 GMT

Hi Scott,

Looking in to your inquiries and will update as soon as I know. You can always look at the reference design for our SoC's available here: nRF5340 SoC - Downloads - nordicsemi.com.

Regards,
Jonathan