Rainbow Electronics ATtiny10 - Manual (Page 92)

92
8127B–AVR–08/09
ATtiny4/5/9/10
• 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 13-12. 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.
13.11 ADC Conversion Result
After the conversion is complete (ADIF is high), the conversion result can be found in the ADC
Data Register (ADCL). For single ended conversion, the result is
where V
IN
(see Table 13-2 on page 93 ) is the voltage on the selected input pin and V
CC
is the
voltage reference. 0x00 represents analog ground, and 0xFF represents the selected reference
voltage minus one LSB.
Output Code
0xFF
0x00
0 V
REF
Input Voltage
DNL
1 LSB
ADCL
V
IN
256
⋅
V
CC
----------------------- =