AD8422

Data Sheet

TABLE OF CONTENTS

Features .............................................................................................. 1

Applications....................................................................................... 1

Connection Diagram ....................................................................... 1

General Description......................................................................... 1

Revision History ............................................................................... 2

Specifications..................................................................................... 3

SOIC Package................................................................................ 3

MSOP Package.............................................................................. 5

Absolute Maximum Ratings............................................................ 8

Thermal Resistance ...................................................................... 8

ESD Caution.................................................................................. 8

Pin Configuration and Function Descriptions............................. 9

Typical Performance Characteristics ........................................... 10

Theory of Operation ...................................................................... 19

Architecture ................................................................................ 19

Gain Selection............................................................................. 19

Reference Terminal .................................................................... 20

Input Voltage Range................................................................... 20

Layout .......................................................................................... 20

Input Bias Current Return Path ............................................... 21

Input Voltages Beyond the Supply Rails.................................. 21

Radio Frequency Interference (RFI)........................................ 22

Applications Information .............................................................. 23

Precision Bridge Conditioning................................................. 23

Process Control Analog Input .................................................. 23

Outline Dimensions....................................................................... 24

Ordering Guide .......................................................................... 24

REVISION HISTORY

1/15—Rev. 0 to Rev. A

Changes to Features Section............................................................ 1

Changes to SOIC Package Section and Table 1 ............................ 4

Changes to MSOP Package Section and Table 2 .......................... 5

Changes to Supply Voltage Parameter and

ESD Parameter, Table 3.................................................................... 8

Deleted Figure 12 and Figure 15, Renumbered Sequentially ... 11

Changes to Figure 10 to Figure 15................................................ 11

Changes to Figure 16, Figure 18, and Figure 19 ......................... 12

Changes to Figure 23 and Figure 24............................................. 13

Changes to Figure 31, Figure 32, and Figure 33 ......................... 14

Changes to Figure 64...................................................................... 23

5/13—Revision 0: Initial Version

Rev. A | Page 2 of 24