ЦАП. Методом последовательных приближений

1.5 Linearity of STM32 ADC and its INL reduction
Increasing the ADC resolution does not result in higher accuracy since the techniques for obtaining higher resolution can reduce DNL (differential non-linearity) but not INL (integral non-linearity), see Section 1.9: ADC enhancement by oversampling technique.
The linearity can be enhanced (INL reduction) from 0.7 to 0.17 LSB by the application of a simple technique to the HW and SW design. Good knowledge of the ADC is assumed for this technique, described in a separate document supplied on request.