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ATmega169P Datasheet(PDF) 226 Page - ATMEL Corporation

Part # ATmega169P
Description  8-bit Microcontroller with 16K Bytes In-System Programmable Flash
PDF  393 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATmega169P Datasheet(HTML) 226 Page - ATMEL Corporation

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226
8018N–AVR–08/09
ATmega169P
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 228 and Table 22-4 on page 229). 0x000 represents analog ground, and
0x3FF represents the selected reference voltage minus one LSB.
Figure 22-14. Differential Measurement Range
ADC
VIN 1024
⋅
VREF
--------------------------
=
ADC
VPOS VNEG
–
() 512
⋅
VREF
-----------------------------------------------------
=
0
Output Code
0x1FF
0x000
V
REF
Differential Input
Voltage (Volts)
0x3FF
0x200
- V
REF



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