I use S32K144EVB. I think there are some differences between the input voltage and the value read by adc channel.
Test has been done under condition below.
SW : ADC_s32k144 (S32K example code)
HW : S32K144EVB
IDE : S32K design studio for ARM version 2018 R1.
1.Connect power from power supply to adc pin
2.Read caluated adc value.
results are as below.
(Input / caled value)
1.001V / 1018
The difference is growing when the input voltage goes to 5V.
I got 3 evb boards. and those gaps exist from All boards with the same SW (example codes).
Please check this out.#
It much better doing after calibration. But the differences are still. ( 10~20 mA level).
Do you think it is working well? Is it okay with these result? 10~20mA gap is acceptable? or any jobs are needed more?
Calibration has been done with API named ' void ADC_DRV_AutoCalibration(const uint32_t instance) '
The results are....
Please give your opinion.