Rainbow Electronics ATmega64L - Manual (Page 207)

207
ATmega16(L)
2466B–09/01
Figure 109. 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 110. 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