SBOS109B September   1999  – December 2025 INA146

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Amplifier A1, A2 Performance
    7. 5.7 Typical Characteristics
  7. 6 Application and Implementation
    1. 6.1 Application Information
      1. 6.1.1 Operating Voltage
      2. 6.1.2 Setting the Gain
      3. 6.1.3 Common-mode Range
      4. 6.1.4 Offset Trim
      5. 6.1.5 Input Impedance
  8. 7 Device and Documentation Support
    1. 7.1 Device Support
      1. 7.1.1 Device Nomenclature
    2. 7.2 Third-Party Products Disclaimer
    3. 7.3 Documentation Support
      1. 7.3.1 Related Documentation
    4. 7.4 Receiving Notification of Documentation Updates
    5. 7.5 Support Resources
    6. 7.6 Trademarks
    7. 7.7 Electrostatic Discharge Caution
    8. 7.8 Glossary
  9. 8 Revision History
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

Package Options

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

6.1.4 Offset Trim

The INA146 is laser-trimmed for low offset voltage and drift. Most applications require no external offset adjustment. Figure 6-2 shows an optional circuit for trimming the offset voltage. A voltage applied to the Ref terminal is summed with the output signal. This feature can be used to null offset voltage. To maintain good common-mode rejection, the source impedance of a signal applied to the Ref terminal must be less than 10Ω and a resistor added to the positive input terminal must be 10 times that, or 100Ω. Alternatively, the trim voltage can be buffered with an operational amplifier such as the OPA277.