AT90CAN128-16AE ATMEL Corporation, AT90CAN128-16AE Datasheet - Page 272
AT90CAN128-16AE
Manufacturer Part Number
AT90CAN128-16AE
Description
8-bit Avr Microcontroller With 128K Bytes of Isp Flash And CAN Controller.flash (Kbytes) 128 Vcc (V) 2.7-5.5 EEPROM (Kbytes) 4 SRAM (bytes) 4K CAN (mess. Obj.) 15
Manufacturer
ATMEL Corporation
Datasheet
1.AT90CAN128-16AE.pdf
(391 pages)
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Offset Compensation
Schemes
ADC Accuracy Definitions
272
AT90CAN128
Figure 132. ADC Power Connections
The gain stage has a built-in offset cancellation circuitry that nulls the offset of differen-
tial measurements 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.
An n-bit single-ended ADC converts a voltage linearly between GND and V
steps (LSBs). The lowest code is read as 0, and the highest code is read as 2
Several parameters describe the deviation from the ideal behavior:
Analog Ground Plane
100nF
(ADC7) PF7
(ADC6) PF6
(ADC5) PF5
(ADC4) PF4
(ADC3) PF3
(ADC2) PF2
(ADC1) PF1
(ADC0) PF0
(AD0) PA0
AREF
AVCC
GND
GND
VCC
51
52
53
54
55
56
57
58
59
60
61
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62
62
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64
64
1
4250C–CAN–03/04
n
-1.
REF
in 2
n
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