SBOS062C September   2000  – January 2022 INA126 , INA2126

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information: INA126
    5. 6.5 Thermal Information: INA2126
    6. 6.6 Electrical Characteristics
    7. 6.7 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
    4. 7.4 Device Functional Modes
      1. 7.4.1 Single-Supply Operation
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Setting the Gain
        2. 8.2.2.2 Offset Trimming
        3. 8.2.2.3 Input Bias Current Return
        4. 8.2.2.4 Input Common-Mode Range
        5. 8.2.2.5 Input Protection
        6. 8.2.2.6 Channel Crosstalk—Dual Version
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
    1. 9.1 Low-Voltage Operation
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Development Support
        1. 11.1.1.1 PSpice® for TI
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Support Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

9.1 Low-Voltage Operation

The INAx126 can be operated on power supplies as low as ±1.35 V. Performance remains excellent with power supplies ranging from ±1.35 V to ±18 V. Most parameters vary only slightly throughout this supply voltage range (see Section 6.7). Operation at low supply voltage requires careful attention to make sure that the common-mode voltage remains within the linear range (see Figure 6-5 and Figure 6-6).

The INAx126 operates from a single power supply with careful attention to input common-mode range, output voltage swing of both op amps, and the voltage applied to the Ref pin. Figure 9-1 shows a bridge amplifier circuit operated from a single 5-V power supply. The bridge provides an input common-mode voltage near 2.5 V, with a relatively small differential voltage.

GUID-57DF9DC4-1281-42F2-8F81-BCA9BCF79848-low.gifFigure 9-1 Bridge Signal Acquisition, Single 5-V Supply