ZHCSR64C december   2022  – may 2023 INA351

PRODUCTION DATA  

  1.   1
  2. 特性
  3. 应用
  4. 说明
  5. Revision History
  6. Device Comparison Table
  7. Pin Configuration and Functions
  8. Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Typical Characteristics
  9. Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Gain-Setting
        1. 8.3.1.1 Gain Error and Drift
      2. 8.3.2 Input Common-Mode Voltage Range
      3. 8.3.3 EMI Rejection
      4. 8.3.4 Typical Specifications and Distributions
      5. 8.3.5 Electrical Overstress
    4. 8.4 Device Functional Modes
  10. Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 Reference Pin
      2. 9.1.2 Input Bias Current Return Path
    2. 9.2 Typical Applications
      1. 9.2.1 Resistive-Bridge Pressure Sensor
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
        3. 9.2.1.3 Application Curves
    3. 9.3 Power Supply Recommendations
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
      2. 9.4.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Device Support
      1. 10.1.1 Development Support
        1. 10.1.1.1 PSpice® for TI
    2. 10.2 Documentation Support
      1. 10.2.1 Related Documentation
    3. 10.3 接收文档更新通知
    4. 10.4 支持资源
    5. 10.5 Trademarks
    6. 10.6 静电放电警告
    7. 10.7 术语表
  12. 11Mechanical, Packaging, and Orderable Information

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Overview

INA351 is a selectable gain instrumentation amplifier with integrated reference buffer designed to provide an integrated, small size, cost-effective solution for applications employing general purpose INAs or discrete implementation of INAs using commodity amplifiers and resistors. The device incorporates a three op amp INA architecture integrating three operational amplifiers and seven precision matched integrated resistors. INA351 is suitable for use in 10-bit to 14-bit systems without any additional effort, but calibrating offset and gain error at a system level can further improve system resolution and accuracy, enabling use in precision applications.

One of the key features of INA351 is that the device does not need any external resistors to set the gain. Often these external resistors require tighter tolerance and careful routing, which adds to system complexity and cost. INA351 is offered in four gain options across two variants. INA351ABS has two gain options of 10 and 20. INA351CDS has two other gain options of 30 and 50. Gains can be selected by connecting the GS pin to logic high or logic low. Note that the GS pin can be left floating as well, as the pin is designed with an internal pull up to default to the same configuration as GS tied logic high.

The INA351 is designed for industrial applications leveraging pressure and temperature sensing via bridge-type sensor networks and load cells. The device can also be used in space-constrained applications such as patient monitoring, sleep diagnostics, electronic hospital beds, and blood glucose monitoring for voltage sensing and differential to single-ended conversion. INA351 can enable these applications to reduce their overall size through the use of tiny packages, including a 2-mm × 1.5-mm X2QFN package and a 2-mm × 2-mm WSON package.