MCP3564-ESLASHST datasheet(85/108 Pages) MICROCHIP

85 / 108 page

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DS20006181C-page 85

MCP3561/2/4

8.4

CONFIG2 Register

Name

Bits

Address

Cof

CONFIG2

0x3

R/W

CONFIG2: CONFIGURATION REGISTER 2

R/W-1

R/W-0

R/W-1

R/W-0

R/W-1

BOOST[1:0]

GAIN[2:0]

AZ_MUX

RESERVED[1:0]

bit 7

bit 0

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

-n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is cleared

x = Bit is unknown

bit 7-6

BOOST[1:0]: ADC Bias Current Selection

11 = ADC channel has current x 2

10 = ADC channel has current x 1 (default)

01 = ADC channel has current x 0.66

00 = ADC channel has current x 0.5

bit 5-3

GAIN[2:0]: ADC Gain Selection

111 = Gain is x64 (x16 analog, x4 digital)

110 = Gain is x32 (x16 analog, x2 digital)

101 = Gain is x16

100 = Gain is x8

011 = Gain is x4

010 = Gain is x2

001 = Gain is x1 (default)

000 = Gain is x1/3

bit 2

AZ_MUX: Auto-Zeroing MUX Setting

1 = ADC auto-zeroing algorithm is enabled. This setting multiplies the conversion time by two and

does not allow Continuous Conversion mode operation (which is then replaced by a series of

consecutive One-Shot mode conversions).

0 = Analog input multiplexer auto-zeroing algorithm is disabled (default)

bit 1-0

RESERVED[1:0]: Should always be equal to ‘11’

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