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AD7856ARS Datasheet(PDF) 11 Page - Analog Devices

Part # AD7856ARS
Description  5 V Single Supply, 8-Channel 14-Bit 285 kSPS Sampling ADC
PDF  32 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD7856ARS Datasheet(HTML) 11 Page - Analog Devices

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AD7856
–11–
REV. A
Table III. Channel Selection
SGL/DIFF
CH2
CH1
CH0
AIN(+)*
AIN(–)*
0
000AIN1
AIN2
0
001AIN3
AIN4
0
010AIN5
AIN6
0
011AIN7
AIN8
0
100AIN2
AIN1
0
101AIN4
AIN3
0
110AIN6
AIN5
0
111AIN8
AIN7
1
000AIN1
AGND
1
001AIN3
AGND
1
010AIN5
AGND
1
011AIN7
AGND
1
100AIN2
AGND
1
101AIN4
AGND
1
110AIN6
AGND
1
111AIN8
AGND
*AIN(+) refers to the positive input seen by the AD7856 sample and hold circuit.
AIN(–) refers to the negative input seen by the AD7856 sample and hold circuit.
Table IV. Calibration Selection
CALMD
CALSLT1
CALSLT0
Calibration Type
0
0
0
A Full Internal Calibration is initiated where the Internal DAC is calibrated
followed by the Internal Gain Error, and finally the Internal Offset Error is
calibrated out. This is the default setting.
0
0
1
Here the Internal Gain Error is calibrated out followed by the Internal Offset
Error calibrated out.
0
1
0
This calibrates out the Internal Offset Error only.
0
1
1
This calibrates out the Internal Gain Error only.
1
0
0
A Full System Calibration is initiated here where first the Internal DAC is
calibrated followed by the System Gain Error, and finally the System Offset
Error is calibrated out.
1
0
1
Here the System Gain Error is calibrated out followed by the System Offset
Error.
1
1
0
This calibrates out the System Offset Error only.
1
1
1
This calibrates out the System Gain Error only.



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