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

3 Description

The INA146 is a precision difference amplifier that can be used to accurately attenuate high differential voltages and reject high common-mode voltages for compatibility with common signal processing voltage levels. High-voltage capability also affords inherent input protection. The input common-mode range extends beyond both supply rails, making the INA146 an excellent choice for both single and dual supply applications.

On-chip precision resistors are laser-trimmed to achieve accurate gain and high common-mode rejection. Excellent TCR tracking of these resistors provides continued high precision over temperature.

A 10:1 difference amplifier provides 0.1V/V gain when the output amplifier is used as a unity-gain buffer. In this configuration, input voltages up to ±100V can be measured. Gains greater than 0.1V/V can be set with an external resistor pair without affecting the common-mode input range.

The INA146 is available in the SO-8 surface-mount package specified for the extended industrial temperature range, –40°C to 85°C.

Package Information
PART NUMBER PACKAGE(1) SPECIFIED TEMPERATURE RANGE PACKAGE SIZE (2)
INA146 SOIC (8) −40°C to 85°C 4.90mm × 6.00mm
(1) For all available packages, see the orderable addendum at the end of the data sheet.
(2) The package size (length × width) is a nominal value and includes pins, where applicable.