MCP3426 datasheet(2/56 Pages) MICROCHIP

2 / 56 page

MCP3426/7/8

DS22226A-page 2

The I2C address bits for the MCP3427 and MCP3428

are selected by using two external I2C address

selection pins (Adr0 and Adr1). The user can configure

the device to one of eight available addresses by

connecting these two address selection pins to VDD,

VSS or float. The I

2C address bits of the MCP3426 are

programmed at the factory during production.

The MCP3426 is available in 8-pin SOIC, DFN, and

MSOP packages. The MCP3427 is available in 10-pin

DFN, and MSOP packages. The MCP3428 is available

in 14-pin SOIC and TSSOP packages.

Package Types

MCP3426 Functional Block Diagram

CH2-

VSS

CH3+

Adr1

Adr0

CH2+

CH3-

CH1-

CH4+

CH1+

CH4-

SDA

SCL

VDD

SOIC, TSSOP

CH1-

VDD

SDA

Adr0

VSS

SCL

CH1+

Adr1

CH2-

CH2+

CH1-

VDD

SDA

CH2+

VSS

SCL

CH1+

CH2-

MSOP, SOIC

MSOP

MCP3426

2x3 DFN *

VDD

CH1-

SDA

CH2+

VSS

5 SCL

CH2-

CH1+

* Includes Exposed Thermal Pad (EP); see Table 3-1.

MCP3427

3x3 DFN *

VSS

CH1-

CH2+

Adr0

SCL

7 SDA

Adr1

CH1+

CH2-

6 VDD

VSS

VDD

PGA

SCL

SDA

I2C

Interface

Gain = 1, 2, 4, or 8

Voltage Reference

Clock

(2.048V)

VREF

ΔΣ ADC

Converter

Oscillator

MCP3426

CH1+

CH1-

CH2+

CH2-

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MCP3426 数据表(PDF) 2 Page - Microchip Technology

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