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ATmega32A bảng dữ liệu(PDF) 220 Page - ATMEL Corporation

tên linh kiện ATmega32A
Giải thích chi tiết về linh kiện  8-bit Microcontroller with 32K Bytes In-System Programmable Flash
PDF  352 Pages
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nhà sản xuất  ATMEL [ATMEL Corporation]
Trang chủ  http://www.atmel.com
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ATmega32A bảng dữ liệu(HTML) 220 Page - ATMEL Corporation

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8155B–AVR–07/09
ATmega32A
Figure 22-12. 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 22-13. 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.
22.8
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
where V
IN is the voltage on the selected input pin and VREF the selected voltage reference (see
Table 22-3 on page 222 and Table 22-4 on page 223). 0x000 represents analog ground, and
0x3FF represents the selected reference voltage minus one LSB.
Output Code
VREF Input Voltage
Ideal ADC
Actual ADC
Output Code
0x3FF
0x000
0
VREF Input Voltage
DNL
1 LSB



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