Rainbow Electronics ATmega8HVD - Manual (Page 95)

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8052B–AVR–09/08
ATmega4HVD/8HVD
Figure 17-7. 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 17-8. 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