Rainbow Electronics ATmega32L - Manual (Page 210)

210
ATmega32(L)
2503C–AVR–10/02
• Integral Non-linearity (INL): After adjusting for offset and gain error, the INL is the
maximum deviation of an actual transition compared to an ideal transition for any
code. Ideal value: 0 LSB.
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