Measurements and Compensation

It is important that DNL and INL values are measured after offset and gain error compensation. If not, the results will be infected by the offset and gain error and thus not reveal the true DNL and INL.

Non-linearity cannot be compensated for with simple calculations. Polynomial approximations or table lookups can be used for that purpose. However, the typical DNL and INL values are ½ LSB for the 10-bit ADC of the AVR, and are rarely of any concern in real life applications.