MCP3919 datasheet(19/88 Pages) MICROCHIP

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DS20005347A-page 19

MCP3919

3.0

PIN DESCRIPTION

The description of the pins are listed in Table 3-1.

TABLE 3-1:

THREE CHANNEL MCP3919 PIN FUNCTION TABLE

MCP3919

SSOP

MCP3919

QFN

Symbol

Function

25, 11

AVDD

Analog Power Supply Pin

CH0+

Noninverting Analog Input Pin for Channel 0

CH0-

Inverting Analog Input Pin for Channel 0

CH1-

Inverting Analog Input Pin for Channel 1

CH1+

Noninverting Analog Input Pin for Channel 1

CH2+

Noninverting Analog Input Pin for Channel 2

CH2-

Inverting Analog Input Pin for Channel 2

8, 9, 10, 11,

12, 13, 19

5, 6, 7

No Connect (for better EMI results connect to AGND)

REFIN+/OUT

Noninverting Voltage Reference Input and Internal Reference

Output Pin

REFIN-

Inverting Voltage Reference Input Pin

10, 26

AGND

Analog Ground Pin, Return Path for Internal Analog Circuitry

17, 20

13, 15, 23

DGND

Digital Ground Pin, Return Path for Internal Digital Circuitry

DR/GAIN1

Data Ready Signal Output Pin or GAIN1 Logic Input Pin

OSC1/CLKI/GAIN0 Oscillator Crystal Connection Pin or External Clock Input Pin or

GAIN0 Logic Input Pin

OSC2/MODE

Oscillator Crystal Connection Pin or Serial Interface Mode Logic

Input Pin

CS/BOOST

Serial Interface Chip Select Input Pin or BOOST Logic Input Pin

SCK/MCLK

Serial Interface Clock Input Pin or Master Clock Input Pin

SDO

Serial Interface Data Output Pin

SDI/OSR1

Serial Interface Data Input Pin or OSR1 Logic Input Pin

RESET/OSR0

Master Reset Logic Input Pin or OSR0 Logic Input Pin

12, 24

DVDD

Digital Power Supply Pin

—

Exposed Thermal Pad. Must be connected to AGND or floating.

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