Rainbow-electronics ATmega8HVD Manuel d'utilisateur télécharger pdf (Page 95)

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

REF

Input Voltage

Ideal ADC

Actual ADC

INL

Output Code

0x3FF

0x000

REF

Input Voltage

DNL

1 LSB

1 2 ... 90 91 92 93 94 95 96 97 98 99 100 ... 167 168

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Rainbow-electronics ATmega8HVD Manuel d'utilisateur Page 95