AMC7812B datasheet(73/92 Pages) TAOS

73 / 92 page

AMC7812B

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SBAS625A – SEPTEMBER 2013 – REVISED SEPTEMBER 2013

ADC Channel Register 1 (Read or Write, Address = 51h, Default = 0000h)

MSB

LSB

BIT 15

BIT 14

BIT 13

BIT 12

BIT 11

BIT 10

BIT 9

BIT 8

BIT 7

BIT 6

BIT 5

BIT 4

BIT 3

BIT 2

BIT 1

BIT 0

SE13

SE14

SE15

These bits specify the external analog auxiliary input channels (CH13, CH14, and CH15) to be converted. The

specified channel is accessed sequentially in the order from bit 14 to bit 0 of ADC channel register 0, and then bit

14 to bit 12 of ADC channel register 1. The input is converted when the corresponding bit is set ('1').

Bits[14:12]

SEn

External single-ended analog input CHn. The result is stored in the ADC-n-data register in straight binary format.

ADC Gain Register (Read or Write, Address = 52h, Default = FFFFh)

MSB

BIT

LSB

BIT 9

BIT 8

BIT 7

BIT 6

BIT 5

BIT 4

BIT 3

BIT 2

BIT 1

BIT 0

ADG0

ADG1

ADG2

ADG3

ADG4

ADG5

ADG6

ADG7

ADG8

ADG9

ADG10

ADG11

ADG12

ADG13

ADG14

ADG15

Bit 15

ADG0

0 = The analog input range of single-ended input CH0 (SE0) is 0 V to VREF or differential input pair DF (CH0+, CH1–) is

–VREF to +VREF

1 = The analog input range of single-ended input CH0 (SE0) is 0 V to (2 × VREF) or differential input pair DF (CH0+,

CH1–) is (–2 × VREF) to (+2 × VREF)

Bit 14

ADG1

0 = The analog input range of single-ended input CH1 (SE1) is 0 V to VREF

1 = The analog input range is 0 V to (2 × VREF)

Bit 13

ADG2

0 = The analog input range of single-ended input CH2 (SE2) is 0 V to VREF or differential input pair DF (CH2+, CH3–) is

–VREF to +VREF

1 = The analog input range of single-ended input CH2 (SE2) is 0 V to (2 × VREF) or differential input pair DF (CH2+,

CH3–) is (–2 × VREF) to (+2 × VREF)

Bit 12

ADG3

0 = The analog input range of single-end input CH3 (SE3) is 0 V to VREF

1 = The analog input range is 0 V to (2 × VREF)

Bit[11:0]

ADG4 to ADG15

0 = The analog input range of CHn (where n = 4 to 15) is 0 V to VREF

1 = The analog input range is 0 V to (2 × VREF)

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