SBOS035B december   1995  – may 2023 INA2128

PRODUCTION DATA  

  1.   1
  2. 1Features
  3. 2Applications
  4. 3Description
  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 Receiving Notification of Documentation Updates
    2. 8.2 Support Resources
    3. 8.3 Trademarks
    4. 8.4 Electrostatic Discharge Caution
    5. 8.5 Glossary
  10. 9Mechanical, Packaging, and Orderable Information

Package Options

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

7.2.8 Input Protection

The inputs of the INA2128 are individually protected for voltages up to ±40 V. For example, a condition of –40 V on one input and +40 V on the other input will not cause damage. Internal circuitry on each input provides low series impedance under normal signal conditions. To provide equivalent protection, series input resistors would contribute excessive noise. If the input is overloaded, the protection circuitry limits the input current to a safe value of approximately 1.5 mA to 5 mA. The typical performance curve “Input Bias Current vs Common-Mode Input Voltage” shows this input current limit behavior. The inputs are protected even if the power supplies are disconnected or turned off.

GUID-20211027-SS0I-MSF8-HH8C-6XGHQ3HCFTRJ-low.png Figure 7-4 Two-Axis Bridge Amplifier