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INA122 Single Supply, Micropower Instrumentation Amplifier
SBOS069A
October 1997 – December 2024
INA122
PRODUCTION DATA
CONTENTS
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INA122 Single Supply, Micropower Instrumentation Amplifier
1
1
Features
2
Applications
3
Description
4
Pin Configuration and Functions
5
Specifications
5.1
Absolute Maximum Ratings
5.2
Recommended Operating Conditions
5.3
Thermal Information
5.4
Electrical Characteristics
5.5
Typical Characteristics
6
Detailed Description
6.1
Overview
6.2
Functional Block Diagram
6.3
Feature Description
6.3.1
Setting the Gain
6.3.2
Input Common-Mode Range
6.3.3
Input Protection
6.3.4
Output Current Range
6.4
Device Functional Modes
7
Application and Implementation
7.1
Application Information
7.1.1
Offset Trimming
7.1.2
Input Bias Current Return Path
7.2
Typical Application
7.2.1
Resistive-Bridge Pressure Sensor
7.2.1.1
Design Requirements
7.2.1.2
Detailed Design Procedure
7.2.1.3
Application Curve
7.3
Power Supply Recommendations
7.4
Layout
7.4.1
Layout Guidelines
7.4.2
Layout Example
8
Device and Documentation Support
8.1
Device Support
8.1.1
Development Support
8.1.1.1
PSpice® for TI
8.1.1.2
TINA-TI (Free Software Download)
8.2
Receiving Notification of Documentation Updates
8.3
Support Resources
8.4
Trademarks
8.5
Electrostatic Discharge Caution
8.6
Glossary
9
Revision History
10
Mechanical, Packaging, and Orderable Information
IMPORTANT NOTICE
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Data Sheet
INA122 Single Supply, Micropower Instrumentation Amplifier
1
Features
Low quiescent current: 60μA
Wide power supply range: 2.2V to 36V
Rail-to-rail output swing
Low offset voltage: 250μV maximum
Low offset drift: 3μV/°C maximum
Low noise: 60nV/√
Hz
Low input bias current: 25nA maximum
Packages
4.9mm × 6mm SOIC
9.81mm × 9.43mm PDIP
2
Applications
Portable electronics
Field transmitters and sensors
Pressure transmitters
Infusion pumps
Electrocardiograms (ECGs)