OP191/OP291/OP491

Rev. D | Page 2 of 24

TABLE OF CONTENTS

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

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

Pin Configurations ........................................................................... 1

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

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

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

Electrical Specifications............................................................... 3

Absolute Maximum Ratings............................................................ 7

Thermal Resistance ...................................................................... 7

ESD Caution.................................................................................. 7

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

Theory of Operation ...................................................................... 17

Input Overvoltage Protection ................................................... 18

Output Voltage Phase Reversal................................................. 18

Overdrive Recovery ................................................................... 18

Applications..................................................................................... 19

Single 3 V Supply, Instrumentation Amplifier ....................... 19

Single-Supply RTD Amplifier................................................... 19

A 2.5 V Reference from a 3 V Supply ...................................... 20

5 V Only, 12-Bit DAC Swings Rail-to-Rail ............................. 20

A High-Side Current Monitor .................................................. 20

A 3 V, Cold Junction Compensated Thermocouple Amplifier

....................................................................................................... 21

Single-Supply, Direct Access Arrangement for Modems...... 21

3 V, 50 Hz/60 Hz Active Notch Filter with False Ground..... 22

Single-Supply, Half-Wave, and Full-Wave Rectifiers............. 22

Outline Dimensions ....................................................................... 23

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

REVISION HISTORY

4/06—Rev. C to Rev. D

Changes to Noise Performance, Voltage Density, Table 1........... 3

Changes to Noise Performance, Voltage Density, Table 2........... 4

Changes to Noise Performance, Voltage Density, Table 3........... 5

Changes to Figure 23 and Figure 24............................................. 10

Changes to Figure 42...................................................................... 13

Changes to Figure 43...................................................................... 14

Changes to Figure 57...................................................................... 16

Added Figure 58.............................................................................. 16

Changed Reference from Figure 47 to Figure 12........................ 17

Updated Outline Dimensions ....................................................... 23

Changes to Ordering Guide .......................................................... 24

3/04—Rev. B to Rev. C.

Changes to OP291 SOIC Pin Configuration .................................1

11/03—Rev. A to Rev. B.

Edits to General Description ...........................................................1

Edits to Pin Configuration ...............................................................1

Changes to Ordering Guide .............................................................5

Updated Outline Dimensions....................................................... 19

12/02—Rev. 0 to Rev. A.

Edits to General Description ...........................................................1

Edits to Pin Configuration ...............................................................1

Changes to Ordering Guide .............................................................5

Edits to Dice Characteristics............................................................5