ATMEGA325-16AJ ATMEL [ATMEL Corporation], ATMEGA325-16AJ Datasheet - Page 203
ATMEGA325-16AJ
Manufacturer Part Number
ATMEGA325-16AJ
Description
8-bit Microcontroller with In-System Programmable Flash
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.ATMEGA325-16AJ.pdf
(347 pages)
- Current page: 203 of 347
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ADC Conversion Result
2570A–AVR–09/04
•
Figure 95. Differential Non-linearity (DNL)
•
•
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
ence (see Table 87 on page 205 and Table 88 on page 206). 0x000 represents analog
ground, and 0x3FF represents the selected reference voltage minus one LSB.
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.
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.
IN
is the voltage on the selected input pin and V
Output Code
0x000
0x3FF
0
1 LSB
ADC
ADC
=
ATmega325/3250/645/6450
(
---------------------------------------------------- -
=
V
POS
V
--------------------------
IN
V
–
⋅
REF
V
V
1024
REF
NEG
) 512
⋅
REF
V
REF
the selected voltage refer-
Input Voltage
203
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