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AS1545 Datasheet(PDF) 20 Page - ams AG

Part # AS1545
Description  Dual, 12-Bit, 1MSPS, SAR ADC
PDF  34 Pages
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Manufacturer  AMSCO [ams AG]
Direct Link  http://www.ams.com
Logo AMSCO - ams AG

AS1545 Datasheet(HTML) 20 Page - ams AG

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www.austriamicrosystems.com
Revision 1.00
20 - 34
AS1545
Data Sheet - D e t a i l e d D e s c r i p t i o n
Analog Input Modes
Table 5. Address Map
Address Map
SGL/
DIFF
A2
A1
A0
ADC A
ADC B
Comments
AIN+
AIN-
BIN+
BIN-
1
0
0
0
AIN0
GND
BIN0
GND
Single Ended
1
0
0
1
AIN1
GND
BIN1
GND
Single Ended
1
0
1
0
AIN2
GND
BIN2
GND
Single Ended
1
0
1
1
AIN3
GND
BIN3
GND
Single Ended
1
1
0
0
AIN4
GND
BIN4
GND
Single Ended
1
1
0
1
AIN5
GND
BIN5
GND
Single Ended
0
0
0
0
AIN0
AIN1
BIN0
BIN1
Fully Differential
0
0
0
1
AIN0
AIN1
BIN0
BIN1
Pseudo Differential
0
0
1
0
AIN2
AIN3
BIN2
BIN3
Fully Differential
0
0
1
1
AIN2
AIN3
BIN2
BIN3
Pseudo Differential
0
1
0
0
AIN4
AIN5
BIN4
BIN5
Fully Differential
0
1
0
1
AIN4
AIN5
BIN4
BIN5
Pseudo Differential
0
1
1
0
AIN0
AIN1
BIN0
BIN1
Pseudo Differential
Difference – A/B Phases –
Counter
Table 6. Input Range
SGL/DIFF
Range
Ain+ - Ain-
Range
Coding
Example
1
0
0 to VREF
Straight
AIN+ - AIN- = 1.766 V
Output Decimal = 2894
Output Binary = 1011 0100 1110
1
1
0 to 2VREF
Straight
AIN+ - AIN- = 1.766V
Output Decimal = 1447
Output Binary = 0101 1010 0111
0
0
0 to VREF
Straight
AIN+ - AIN- = 1.666 V
Output Decimal = 2703
Output Binary = 1010 1010 1010
0
1
0 to 2VREF
Straight
AIN+ - AIN- = 1.666 V
Output Decimal = 1365
Output Binary = 0101 0101 0101
00
-VREF/2 to +VREF/2
2’s comp
AIN+ - AIN- = 1.666 V
Output Decimal = 4095
Output Binary = 0111 1111 1111 (its 2’s comp)
01
-VREF to +VREF
2’s comp
AIN+ - AIN- = 1.666 V
Output Decimal= 3413
Output Binary= 0101 0101 0101 (its 2’s comp)



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