2

INA181, INA2181, INA4181

SBOS793B – APRIL 2017 – REVISED NOVEMBER 2017

www.ti.com

Product Folder Links: INA181 INA2181 INA4181

Submit Documentation Feedback

Copyright © 2017, Texas Instruments Incorporated

Table of Contents

1

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

2

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

3

Description ............................................................. 1

4

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

5

Device Comparison Table..................................... 3

6

Pin Configurations and Functions ....................... 3

7

Specifications......................................................... 6

7.1

Absolute Maximum Ratings ..................................... 6

7.2

ESD Ratings.............................................................. 6

7.3

Recommended Operating Conditions ....................... 6

7.4

Thermal Information .................................................. 6

7.5

Electrical Characteristics........................................... 7

7.6

Typical Characteristics .............................................. 8

8

Detailed Description ............................................ 14

8.1

Overview ................................................................. 14

8.2

Functional Block Diagrams ..................................... 14

8.3

Feature Description................................................. 16

8.4

Device Functional Modes........................................ 18

9

Application and Implementation ........................ 21

9.1

Application Information............................................ 21

9.2

Typical Applications ................................................ 25

10

Power Supply Recommendations ..................... 29

10.1

Common-Mode Transients Greater Than 26 V .... 29

11

Layout................................................................... 30

11.1

Layout Guidelines ................................................. 30

11.2

Layout Example .................................................... 30

12

Device and Documentation Support ................. 33

12.1

Device Support...................................................... 33

12.2

Documentation Support ........................................ 33

12.3

Related Links ........................................................ 33

12.4

Receiving Notification of Documentation Updates 33

12.5

Community Resources.......................................... 33

12.6

Trademarks ........................................................... 33

12.7

Electrostatic Discharge Caution ............................ 33

12.8

Glossary ................................................................ 34

13

Mechanical, Packaging, and Orderable

Information ........................................................... 34

4 Revision History

Changes from Revision A (August 2017) to Revision B

Page

•

Added INA4181 preview device and associated content to data sheet ................................................................................. 1

•

Changed design parameter name in Table 3 from "Accuracy" to "Current sensing error" for clarity .................................. 25

•

Changed "RMS" to "RSS" in reference to equation 7 ......................................................................................................... 26

Changes from Original (April 2017) to Revision A

Page

•

Added INA2181 preview device and associated content to data sheet ................................................................................. 1