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.#