MCP37231 datasheet(6/144 Pages) MICROCHIP

6 / 144 page

MCP37231/21-200 AND MCP37D31/21-200

DS20005322D-page 6

 2014-2016 Microchip Technology Inc.

TABLE 1-1:

PIN FUNCTION TABLE FOR VTLA-124

Pin No.

Name

I/O Type

Description

Power Supply Pins

A2, A22, A65, B1,

B52

AVDD18

Supply

Supply voltage input (1.8V) for analog section

A12, A56, A60,

A63, B10, B11, B12,

B13, B15, B16,

B45, B49, B53

AVDD12

Supply voltage input (1.2V) for analog section

A25, A30, B39

DVDD12

Supply voltage input (1.2V) for digital section

A41, B24, B27,

B31, B36, B43

DVDD18

Supply voltage input (1.8V) for digital section and all digital I/O

GND

Exposed pad: Common ground pin for digital and analog sections

ADC Analog Input Pins

AIN6+

Analog

Input

Channel 6 differential analog input (+)

AIN6-

Channel 6 differential analog input (-)

AIN2+

Channel 2 differential analog input (+)

AIN2-

Channel 2 differential analog input (-)

AIN4+

Channel 4 differential analog input (+)

AIN4-

Channel 4 differential analog input (-)

AIN0+

Channel 0 differential analog input (+)

AIN0-

Channel 0 differential analog input (-)

AIN1+

Channel 1 differential analog input (+)

AIN1-

Channel 1 differential analog input (-)

AIN7+

Channel 7 differential analog input (+)

AIN7-

Channel 7 differential analog input (-)

AIN3+

Channel 3 differential analog input (+)

A10

AIN3-

Channel 3 differential analog input (-)

AIN5+

Channel 5 differential analog input (+)

A11

AIN5-

Channel 5 differential analog input (-)

A21

CLK+

Differential clock input (+)

B17

CLK-

Differential clock input (-)

Reference Pins(1)

A57, B46

REF1+

Analog

Output

Differential reference 1 (+) voltage

A58, B47

REF1-

Differential reference 1 (-) voltage

A61, B50

REF0+

Differential reference 0 (+) voltage

A62, B51

REF0-

Differential reference 0 (-) voltage

SENSE, Bandgap and Common-Mode Voltage Pins

B48

SENSE

Analog

Input

Analog input full-scale range selection. See Table 4-2 for SENSE

voltage settings.

A59

VBG

Analog

Output

Internal bandgap output voltage

Connect a decoupling capacitor (2.2 µF)

VCMIN

Analog

Input

Common-mode voltage input for auto-calibration

Connect VCM voltage(2)

A55

VCM

Common-mode output voltage (900 mV) for analog input signal

Connect a decoupling capacitor (0.1 µF)(3)

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