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AT90USB646 Datasheet(PDF) 327 Page - ATMEL Corporation |
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AT90USB646 Datasheet(HTML) 327 Page - ATMEL Corporation |
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327 / 434 page  327 7593A–AVR–02/06 AT90USB64/128 Figure 25-12. 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 25-13. 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. 25.7 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 VREF Input Voltage Ideal ADC Actual ADC Output Code 0x3FF 0x000 0 VREF Input Voltage DNL 1 LSB |
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