AS1520/AS1521
Data Sheet - Detailed Description
Channel Selection
Depending on the setting of bit MODE (page 15), the internal inputs of the ADC (AIN+ and AIN-) are connected differ-
ently to the input channels (CH0:CH7 and COM).
Single-Ended Input
Table 10. Input Channel Selection for MODE = 1
SEL2
SEL1
SEL0
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
COM
AIN-
AIN-
AIN-
AIN-
AIN-
AIN-
AIN-
AIN-
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
AIN+
AIN+
AIN+
AIN+
AIN+
AIN+
AIN+
AIN+
Note: In single-ended mode pin COM should be connected to GND pin.
Differential Input
Table 11. Input Channel Selection for MODE = 0
SEL2
SEL1
SEL0
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
AIN-
AIN+
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
AIN+
AIN-
AIN+
AIN-
AIN+
AIN-
AIN-
AIN+
AIN-
AIN-
AIN+
AIN-
AIN+
AIN+
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