nRF51822: Connecting VCC and AVDD?

[Oleh]

Referring to the PCA10001 schematic, there is a solder bridge SB1, which connects AVDD with VCC_nRF.

Can you please explain in which cases is it needed?

Thank you Oleh

[Kartik Lamba]

Hi Håkon,

A quick follow-up question: If I am not using the DC/DC converter, would SB1 on the PCA10001 schematic need to be bridged? Or is there an internal LDO which powers AVDD from VDD?

Thanks, Kartik

[Håkon Alseth]

Hi Kartik,

We recommend that you connect AVDD and VDD together when running on internal LDO, as shown in the reference circuitry. It is correct that it's an internal connection, but to lower the resistance between the two nets, we recommend that you connect them externally when running on LDO power scheme.

Best regards Håkon