Hi,
We are evaluating ADC functionality.(We use nrf52832 on a device with sdk 16.)
The evaluation was performed under the conditions with and without offset calibration (temperature 6 conditions), but the error was reduced under the conditions without offset calibration.
Offset calibration was performed only once when the power was turned on, and the power was turned on again at each temperature.
This result suggests that (1) it is not offset calibrated, or (2) it is offset calibrated, but an error is added.
About (1)
Please tell me how to calibrate the correct offset.
For example, is there a specification for the timing of offset calibration? How many seconds should be applied after supplying power to the microcomputer, or how many seconds should be applied.
About (2)
The error with offset calibration was stated as ± 2LSB, but what is the error without offset calibration? Also, is it possible that the overall error including the gain error will be larger if offset calibration is applied?
Best regards,
shuto
