ZHCSO32C September   2000  – January 2022 INA126 , INA2126

PRODUCTION DATA  

  1. 特性
  2. 应用
  3. 说明
  4. Revision History
  5. Pin Configuration and Functions
  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. 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. 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. 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 接收文档更新通知
    3. 11.3 支持资源
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 术语表
  12. 12Mechanical, Packaging, and Orderable Information

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订购信息

Setting the Gain

Gain is set by connecting an external resistor, RG:

Equation 1. g = 5 + 80 kΩ / RG

Commonly used gains and RG resistor values are shown in Figure 8-1.

The 80-kΩ term in Equation 1 comes from the internal metal-film resistors, which are laser-trimmed to accurate absolute values. The accuracy and temperature coefficient of these resistors are included in the gain accuracy and drift specifications.

The stability and temperature drift of the external gain setting resistor, RG, also affects gain. The RG contribution to gain accuracy and drift can be directly inferred from Equation 1. Low resistor values required for high gain can make wiring resistance important. Sockets add to the wiring resistance, which contributes additional gain error in gains of approximately 100 or greater.