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AS1520/AS1521

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

Note: In single-ended mode pin COM should be connected to GND pin.

Differential Input

Table 10. Input Channel Selection for MODE = 1

SEL2

SEL1

SEL0

CH0

CH1

CH2

CH3

CH4

CH5

CH6

CH7

COM

0

0

0

AIN+

AIN-

0

0

1

AIN+

AIN-

0

1

0

AIN+

AIN-

0

1

1

AIN+

AIN-

1

0

0

AIN+

AIN-

1

0

1

AIN+

AIN-

1

1

0

AIN+

AIN-

1

1

1

AIN+

AIN-

Table 11. Input Channel Selection for MODE = 0

SEL2

SEL1

SEL0

CH0

CH1

CH2

CH3

CH4

CH5

CH6

CH7

0

0

0

AIN+

AIN-

0

0

1

AIN+

AIN-

0

1

0

AIN+

AIN-

0

1

1

AIN+

AIN-

1

0

0

AIN-

AIN+

1

0

1

AIN-

AIN+

1

1

0

AIN-

AIN+

1

1

1

AIN-

AIN+