AS1545
Datasheet - Detailed Description
Analog Input Modes
Table 5. Address Map
Address Map
ADC A
AIN+
ADC B
BIN+
SGL/
A2
A1
A0
Comments
DIFF
AIN-
GND
GND
GND
GND
GND
GND
AIN1
AIN1
AIN3
AIN3
AIN5
AIN5
BIN-
GND
GND
GND
GND
GND
GND
BIN1
BIN1
BIN3
BIN3
BIN5
BIN5
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
1
1
0
0
0
0
1
1
0
0
1
1
0
0
0
0
1
1
0
0
0
1
0
1
0
1
0
1
0
1
0
1
AIN0
AIN1
AIN2
AIN3
AIN4
AIN5
AIN0
AIN0
AIN2
AIN2
AIN4
AIN4
BIN0
BIN1
BIN2
BIN3
BIN4
BIN5
BIN0
BIN0
BIN2
BIN2
BIN4
BIN4
Single Ended
Single Ended
Single Ended
Single Ended
Single Ended
Single Ended
Fully Differential
Pseudo Differential
Fully Differential
Pseudo Differential
Fully Differential
Pseudo Differential
Pseudo Differential
Difference – A/B Phases –
Counter
0
1
1
0
AIN0
AIN1
BIN0
BIN1
Table 6. Input Range
Ain+ - Ain-
Range
SGL/DIFF Range
Coding
Example
AIN+ - AIN- = 1.766 V
Output Decimal = 2894
Output Binary = 1011 0100 1110
1
1
0
0
0
0
0
1
0
1
0
1
0 to VREF
0 to 2VREF
0 to VREF
0 to 2VREF
Straight
Straight
Straight
Straight
2’s comp
2’s comp
AIN+ - AIN- = 1.766V
Output Decimal = 1447
Output Binary = 0101 1010 0111
AIN+ - AIN- = 1.666 V
Output Decimal = 2703
Output Binary = 1010 1010 1010
AIN+ - AIN- = 1.666 V
Output Decimal = 1365
Output Binary = 0101 0101 0101
AIN+ - AIN- = 1.666 V
Output Decimal = 4095
Output Binary = 0111 1111 1111 (its 2’s comp)
-VREF/2 to +VREF/2
-VREF to +VREF
AIN+ - AIN- = 1.666 V
Output Decimal= 3413
Output Binary= 0101 0101 0101 (its 2’s comp)
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