Datasheet

252
8011O–AVR–07/10
ATmega164P/324P/644P
Figure 20-12. 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 (1 LSB). Ideal value: 0 LSB.
Figure 20-13. 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 (1 LSB wide) will code to the same value. Always ±0.5 LSB.
• 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: ±0.5 LSB.
Output Code
V
REF
Input Voltage
Ideal ADC
Actual ADC
INL
Output Code
0x3FF
0x000
0
V
REF
Input Voltage
DNL
1 LSB