S32K142 ADC conversion accuracy

[Jacky_wang]

 FS32K142 Datasheet lists the ADC conversion accuracy as +8 and does not indicate the test temperature. I would like to confirm whether this error precision is applicable to the whole temperature range, and whether there is any relevant documentation.

 

[Senlent]

Hi@Jacky_wang

      According to the definition of TUE, it should already include the factors affected by temperature, +- 4 LSB is a typical value measured at 25℃, and +- 8 LSB should be the worst case.

AN12217: S32K1xx ADC guidelines, specs, and configuration – Application Note  

Total Unadjusted Error(TUE)

TUE is the summation of offset,gain,linearity,and quantization errors.This is a key parameter since it provides the real expected accuracy of the ADC.For any given input voltage.Vadin,TUE is the difference in the conversion value obtained compared to the ideal expectation,expressed in LSBs.

The term "unadjusted" means TUE is measured via raw conversion data,not normalized in any way to remove ADC inherent errors.

DNL,INL,and TUE represent the ADC converting on a static/DC input.Hence these errors represent the ADC Static/DC performance.