MCP3901 datasheet(45/60 Pages) MICROCHIP

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DS22192C-page 45

MCP3901

7.4

Gain Configuration Register

This registers contains the settings for the PGA gains

for each channel as well as the BOOST options for

each channel.

GAIN CONFIGURATION REGISTER (GAIN): ADDRESS 0x08

R/W-0

PGA_CH1

<2>

PGA_CH1

<1>

PGA_CH1

<0>

BOOST_

CH1

BOOST_

CH0

PGA_CH0

<2>

PGA_CH0

<1>

PGA_CH0

<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 7-5

PGA_CH1<2:0>: PGA Setting for Channel 1 bits

111

= Reserved (Gain = 1)

110

= Reserved (Gain = 1)

101

= Gain is 32

100

= Gain is 16

011

= Gain is 8

010

= Gain is 4

001

= Gain is 2

000

= Gain is 1

bit 4-3

BOOST_CH<1:0> Current Scaling for High-Speed Operation bits

= Both channels have current x 2

= Channel 1 has current x 2

= Channel 0 has current x 2

= Neither channel has current x 2

bit 2-0

PGA_CH0<2:0>: PGA Setting for Channel 0 bits

111

= Reserved (Gain = 1)

110

= Reserved (Gain = 1)

101

= Gain is 32

100

= Gain is 16

011

= Gain is 8

010

= Gain is 4

001

= Gain is 2

000

= Gain is 1

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