nRF52 adc Calibration

[KingKarl237]

Hello, i'm searching for informations about calibrating the SAADC of the nRF52. And i have read here: Link

For nRF52, there are no calibration values that I know of. You need instead to periodically calibrate the SAADC by calling the TASKS_CALIBRATEOFFSET task.

I noticed calling TASKS_CALIBRATEOFFSET improves the Offset, but how often do i have to do that? Do you have some additional information on that?

Additional Info: I'm sampling every 10ms(100Hz) 4 Channels in 12Bit Single Mode.

1. Battery Voltage
2. Voltagesignal of an IC
3. Voltage of an potentiometer 1k
4. Voltagesignal of an external sensor

Thanks

[KingKarl237]

That means I have to sample channel 1 with oversample in burst mode and then channel 2, channel 3 etc. right? Because oversampling in scan mode is not possible right?