SBOS069A October   1997  – December 2024 INA122

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 Recommended Operating Conditions
    3. 5.3 Thermal Information
    4. 5.4 Electrical Characteristics
    5. 5.5 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Setting the Gain
      2. 6.3.2 Input Common-Mode Range
      3. 6.3.3 Input Protection
      4. 6.3.4 Output Current Range
    4. 6.4 Device Functional Modes
  8. 7 Application and Implementation
    1. 7.1 Application Information
      1. 7.1.1 Offset Trimming
      2. 7.1.2 Input Bias Current Return Path
    2. 7.2 Typical Application
      1. 7.2.1 Resistive-Bridge Pressure Sensor
        1. 7.2.1.1 Design Requirements
        2. 7.2.1.2 Detailed Design Procedure
        3. 7.2.1.3 Application Curve
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Device Support
      1. 8.1.1 Development Support
        1. 8.1.1.1 PSpice® for TI
        2. 8.1.1.2 TINA-TI (Free Software Download)
    2. 8.2 Receiving Notification of Documentation Updates
    3. 8.3 Support Resources
    4. 8.4 Trademarks
    5. 8.5 Electrostatic Discharge Caution
    6. 8.6 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • D|8
  • P|8
Thermal pad, mechanical data (Package|Pins)
Orderable Information

3 Description

The INA122 is a precision instrumentation amplifier for accurate, low-noise differential signal acquisition. The two-op-amp design provides excellent performance with very low quiescent current (60μA), and is designed for portable instrumentation and data acquisition systems. The INA122 can be operated with single or dual power supplies from 2.2V to 36V.

A single external resistor sets gain from 5V/V to 10000V/V. Laser trimming provides very low offset voltage (250μV maximum), offset voltage drift (3μV/°C maximum) and excellent common-mode rejection.

Package options include 8-pin plastic DIP and SOIC surface-mount packages. Both packages are specified for the −40°C to +85°C temperature range.

Package Information
PART NUMBERPACKAGE(1)PACKAGE SIZE(2)
INA122P (PDIP, 8)9.81mm × 9.43mm
D (SOIC, 8)4.9mm × 6mm
(1) For all available packages, see Section 10.
(2) The package size (length × width) is a nominal value and includes pins, where applicable.
INA122 INA122 Basic Connections INA122 Basic Connections