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OPA191, OPA2191, OPA4191

SBOS701C – DECEMEBER 2015 – REVISED OCTOBER 2019

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Product Folder Links: OPA191 OPA2191 OPA4191

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Copyright © 2015–2019, Texas Instruments Incorporated

Table of Contents

1

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

2

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

3

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

4

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

5

Pin Configuration and Functions ......................... 3

6

Specifications......................................................... 5

6.1

Absolute Maximum Ratings ...................................... 5

6.2

ESD Ratings.............................................................. 5

6.3

Recommended Operating Conditions ....................... 5

6.4

Thermal Information: OPA191 .................................. 6

6.5

Thermal Information: OPA2191 ................................ 6

6.6

Thermal Information: OPA4191 ................................ 6

6.7

V to 36 V) ................................................................... 7

6.8

4.5 V to 8 V)............................................................... 9

6.9

Typical Characteristics ............................................ 11

7

Parameter Measurement Information ................ 20

7.1

Input Offset Voltage Drift......................................... 20

8

Detailed Description ............................................ 22

8.1

Overview ................................................................. 22

8.2

Functional Block Diagram ....................................... 22

8.3

Feature Description................................................. 23

8.4

Device Functional Modes........................................ 30

9

Application and Implementation ........................ 31

9.1

Application Information............................................ 31

9.2

Typical Applications ................................................ 31

10

Power Supply Recommendations ..................... 35

11

Layout................................................................... 35

11.1

Layout Guidelines ................................................. 35

11.2

Layout Example .................................................... 36

12

Device and Documentation Support ................. 37

12.1

Device Support...................................................... 37

12.2

Documentation Support ........................................ 37

12.3

Related Links ........................................................ 37

12.4

Support Resources ............................................... 37

12.5

Trademarks ........................................................... 38

12.6

Electrostatic Discharge Caution ............................ 38

12.7

Glossary ................................................................ 38

13

Mechanical, Packaging, and Orderable

Information ........................................................... 38

4 Revision History

NOTE: Page numbers for previous revisions may differ from page numbers in the current version.

Changes from Revision B (July 2019) to Revision C

Page

•

Changed OPA4191 RUM package from preview to production data (active) ........................................................................ 1

Changes from Revision A (April 2016) to Revision B

Page

•

Added advanced information (preview) 16-pin RUM (WQFN) package and associated content to data sheet ................... 1

•

Changed Figure 32 condition from G = –1 to G = 1............................................................................................................. 17

•

Changed Figure 33 condition from G = 1 to G = –1 ............................................................................................................ 17

Changes from Original (December 2015) to Revision A

Page

•

Changed DBV and DGK packages from product preview to production data ....................................................................... 1

•

Added input offset voltage drift values for DBV and DGK packages to both electrical characteristics tables ....................... 5

•

Added crosstalk values to both electrical characteristics tables............................................................................................. 5

•

Changed Figure 23, 0.1-Hz to 10-Hz Noise ......................................................................................................................... 15

•

Added text regarding capacitive load drive to the Capacitive Load and Stability section .................................................... 26

•

Added Figure 56 .................................................................................................................................................................. 26