ZHCSRV7B december   1995  – may 2023 INA2128

PRODUCTION DATA  

  1.   1
  2. 1特性
  3. 2应用
  4. 3说明
  5. 4Revision History
  6. 5Pin Configuration and Functions
  7. 6Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Typical Characteristics
  8. 7Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Setting The Gain
      2. 7.2.2 Dynamic Performance
      3. 7.2.3 Noise Performance
      4. 7.2.4 Offset Trimming
      5. 7.2.5 Input Bias Current Return Path
      6. 7.2.6 Input Common-Mode Range
      7. 7.2.7 Low-Voltage Operation
      8. 7.2.8 Input Protection
      9. 7.2.9 Channel Crosstalk
  9. 8Device and Documentation Support
    1. 8.1 接收文档更新通知
    2. 8.2 支持资源
    3. 8.3 Trademarks
    4. 8.4 静电放电警告
    5. 8.5 术语表
  10. 9Mechanical, Packaging, and Orderable Information

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7.2.6 Input Common-Mode Range

The linear input voltage range of the input circuitry of the INA2128 is from approximately 1.4 V less than the positive supply voltage to 1.7 V greater than the negative supply. As a differential input voltage causes the output voltage increase, the linear input range is limited by the output voltage swing of amplifiers A1 and A2. Therefore, the linear common-mode input range is related to the output voltage of the complete amplifier. This behavior also depends on supply voltage—see performance curves Figure 6-6 and Figure 6-5.

Input-overload can produce an output voltage that appears normal. For example, if an input overload condition drives both input amplifiers to the positive output swing limit, the difference voltage measured by the output amplifier is near zero. The output of the INA2128 is near 0 V even though both inputs are overloaded.

GUID-20211027-SS0I-W8CW-FFV2-MJGDDCZC2Q6D-low.png Figure 7-3 Providing an Input Common-Mode Current Path