SAADC reference voltage

[Sundar_santhanam@1998]

Hi, 

Is it possible to give 3.3V to the Vdd pin of my nrf52840 to change the reference voltage of saadc to 3.3V ? Do I have to change any configurations for the same?

[Turbo J]

The only available references for the SAADC are VDD/4 (VCC/4) and 0.6V internal.

[Sundar_santhanam@1998]

im going to power up my board using USB power supply which is 5V and so is it 5/4?

[Turbo J]

Nope: Read the PS.