Datasheet

256
8272E–AVR–04/2013
ATmega164A/PA/324A/PA/644A/PA/1284/P
Figure 23-12. Integral non-linearity (INL).
• Differential Non-linearity (DNL): The maximum deviation of the actual code width (the interval
between two adjacent transitions) from the ideal code width (1LSB). Ideal value: 0LSB
Figure 23-13. Differential non-linearity (DNL).
• Quantization Error: Due to the quantization of the input voltage into a finite number of codes, a
range of input voltages (1LSB wide) will code to the same value. Always ±0.5LSB
• Absolute Accuracy: The maximum deviation of an actual (unadjusted) transition compared to
an ideal transition for any code. This is the compound effect of Offset, Gain Error, Differential
Error, Non-linearity, and Quantization Error. Ideal value: ±0.5LSB
Output Code
V
REF
Input Voltage
Ideal ADC
Actual ADC
INL
Output Code
0x3FF
0x000
0
V
REF
Input Voltage
DNL
1 LSB