Rainbow-electronics ATmega128L Manual de usuario descargar pdf (Pagina 231)

100

101

231

ATmega128(L)

2467B–09/01

Figure 116. 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 117. 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.

ADC Conversion Result After the conversion is complete (ADIF is high), the conversion result can be found in

the ADC Result registers (ADCL, ADCH).

For single ended conversion, the result is

Output code

REF

Input voltage

Ideal ADC

Actual ADC

INL

Output code

0x3FF

0x000

REF

Input voltage

DNL

1 LSB

1 2 ... 226 227 228 229 230 231 232 233 234 235 236 ... 330 331

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Rainbow-electronics ATmega128L Manual de usuario Pagina 231

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