nRF52x series ASIC query

[prabhakar kumar]

Dear Hardware Application Engineer,

We are using nRF ASICs for our IoT products for the past two years. 

In nRF52x series products, forex. nRF52840, there is a power supply input to the ASIC, designated as DEC6 here.

Though there is a provision for Decoupling capacitor (C10) it is made NC. 

1. Pls elaborate on the functionality of the DEC6 pin. Is it powering the PA circuit? If not directly, could you pls elaborate on how PA gets supply?

Thanks

[Jared]

Hi,

 DEC6 is an extra decoupling for the internal regulation. The pin is connected directly to DEC4. Only footprint should be placed, it shouldn't be populated with a capacitor.

best regards

Jared