Is it possible to calibrate NRF52832 ADC gain error?

[wty]

Hi,

We got a few boards that have large ADC error. I've already using nrfx_saadc_calibrate_offset to calibrate the offset so I suspect it's caused by gain error. The error is about 1%, but we are measuring the battery voltage, so it's causing 10% error in battery capacity.

I want to add calibration during testing, so there are some questions:

1.Is the gain error a fixed value? Does it varies over time/channel?

2.There are a factory programmed calibration value in NRF51, is there the same thing in NRF52?

[Karl Ylvisaker]

Hello,

All public information about the SoC and its onboard SAADC is provided in their documentation on the Infocenter. We require a signed NDA in place to discuss any non-public information about the devices.
I do not see any information about your company in your user profile, so I do not know if you might already have an NDA in place.
If you do not, you can contact your local Regional Sales Manager (RSM) in order to sign an NDA.
If you do not know who your RSM is, please send me a direct message with your location and company so I can provide you with the contact information for your RSM.

Best regards,
Karl