VDD ripple range

[jermi]

Hi nordic：

      What is the required voltage ripple range for the nrf52820 when powered at 3.3V,  and what is the normal output voltage range for DEC6?

Best Regards！！

jermi

[Priyanka]

Hi Jermi,

According to the documentation, what we say is to keep the supply voltage free of any AC ripple voltage, so I would recommend you to keep it as low as possible. Also, the output voltage at DEC6 should be as close as possible to the supply.

I am checking internally to see if I can provide any numbers for these values.

-Priyanka

[jermi]

Hi Priyanka：

   Thank you for your reply. Since our product is a modular component, we need to know the approximate voltage ranges for DEC4 and DEC6 during production. Additionally, our end customers require specifications for the ripple tolerance when the VDD supply voltage is 3.3V. We look forward to your response.

Best Regards！

jermi

[Priyanka]

Hi,

DEC6 is connected to DEC4 externally, and expected level is 1.26V.

For the ripple, we do not have a specified requirement, but, we observed ripple at 1MHz was very visible when other ripple frequency was not so much so. Tested Vpp is up to 30mV.

-Priyanka