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ATmega128 Datasheet(PDF) 238 Page - ATMEL Corporation

Part # ATmega128
Description  8-bit Microcontroller with 128K Bytes In-System Programmable Flash
PDF  386 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATmega128 Datasheet(HTML) 238 Page - ATMEL Corporation

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238
2467S–AVR–07/09
ATmega128
Figure 114. ADC Power Connections
Offset Compensation
Schemes
The gain stage has a built-in offset cancellation circuitry that nulls the offset of differential mea-
surements as much as possible. The remaining offset in the analog path can be measured
directly by selecting the same channel for both differential inputs. This offset residue can be then
subtracted in software from the measurement results. Using this kind of software based offset
correction, offset on any channel can be reduced below one LSB.
VCC
GND
100nF
(ADC0) PF0
(ADC7) PF7
(ADC1) PF1
(ADC2) PF2
(ADC3) PF3
(ADC4) PF4
(ADC5) PF5
(ADC6) PF6
AREF
GND
AVCC
52
53
54
55
56
57
58
59
60
61
61
62
62
63
63
64
64
1
51
(AD0) PA0
10µ
H



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