MCP37231 datasheet(97/144 Pages) MICROCHIP

97 / 144 page

MCP37231/21-200 AND MCP37D31/21-200

DS20005322D-page 97

 2014-2016 Microchip Technology Inc.

ADDRESS 0X63 – ADC OUTPUT BIT (RESOLUTION) AND LVDS LOAD

R/W-0

R/W-1

OUTPUT_BIT

LVDS_LOAD

LVDS_IMODE<2:0>

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 7-4

16-Bit Device (MCP37231/D31-200):

OUTPUT_BIT<3:0>: Select number of output data bits(1)

1111

= 15

1110

= 14

1101

= 13

1100

= 12

1011

= 11

1010

= 10

1001

= 9

1000

= 8

0111

= 7

0110

= 6

0101

= 5

0100

= 4

0011

= 3

0010

= 2

0001

= 1

0000

= 16-bit (Default)

14-Bit Device (MCP37221/D21-200):

OUTPUT_BIT<3:0>: These bits have no effect(2)

bit 3

LVDS_LOAD: Internal LVDS load termination

Enable internal load termination

Disable internal load termination (Default)

bit 2-0

LVDS_IMODE<2:0>: LVDS driver current control bits

111

= 7.2 mA

011

= 5.4 mA

001

= 3.5 mA (Default)

000

= 1.8 mA

Do not use the following settings(3):

110, 101, 100, 010

Note

These bits are applicable for the 16-bit device only. See Address 0x68 (Register 5-26) for additional DM1 and DM2 bits.

In the 14-bit device, ADC resolution is not user selectable.

These settings can result in unknown output currents.

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