ATmega64A datasheet(245/392 Pages) ATMEL

tên linh kiện	ATmega64A

Giải thích chi tiết về linh kiện	8-bit Microcontroller with 64K Bytes In-System Programmable Flash

PDF	392 Pages

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245

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

VREF Input Voltage

DNL

1 LSB

ADC

VIN 1024

⋅

VREF

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ATmega64A bảng dữ liệu(PDF) 245 Page - ATMEL Corporation