ADC Accuracy Definitions

An n-bit single-ended ADC converts a voltage linearly between GND and VREF in 2n steps (LSBs). The lowest code is read as 0, and the highest code is read as 2n-1.

Several parameters describe the deviation from the ideal behavior:

Figure 1. Offset Error
Figure 2. Gain Error
Figure 3. Integral Non-linearity (INL)
Figure 4. Differential Non-linearity (DNL)