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ATmega64A Datasheet(PDF) 245 Page - ATMEL Corporation

Part # ATmega64A
Description  8-bit Microcontroller with 64K Bytes In-System Programmable Flash
PDF  392 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATmega64A Datasheet(HTML) 245 Page - ATMEL Corporation

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8160C–AVR–07/09
ATmega64A
Figure 23-12. 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 23-13. 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.
23.8
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
ADC
VIN 1024
⋅
VREF
--------------------------
=



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