SLVSIL6C January   2026  – April 2026 INA151

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison Table
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    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. 7 Detailed Description
    1. 7.1 Overview
      1. 7.1.1 INA151 Transconductance Architecture Overview
      2. 7.1.2 Multiplexing Capability
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Input Common-Mode Voltage Range
      2. 7.3.2 Low Input Bias Current
      3. 7.3.3 Reference Voltage Range for G=1/4 (INA151D)
    4. 7.4 Device Functional Modes
      1. 7.4.1 Output Enable and Disable
  9. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Reference Pin
    2. 8.2 Typical Applications
      1. 8.2.1 Battery Monitoring Using INA151
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 DC Accuracy Calculations
          2. 8.2.1.2.2 RC Filter Design Consideration
          3. 8.2.1.2.3 ADC Input Protection
        3. 8.2.1.3 Output Pullup Resistor in Multiplexer Configuration
        4. 8.2.1.4 Application Curves
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Device Support
      1. 9.1.1 Development Support
        1. 9.1.1.1 PSpice® for TI
    2. 9.2 Documentation Support
      1. 9.2.1 Related Documentation
    3. 9.3 Receiving Notification of Documentation Updates
    4. 9.4 Support Resources
    5. 9.5 Trademarks
    6. 9.6 Electrostatic Discharge Caution
    7. 9.7 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

Package Options

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

8.1.1 Reference Pin

The output voltage of the INA151 is developed with respect to the voltage on the reference pin (REF). Often in dual-supply operation, REF pin connects to the system ground. However, in single-supply operation, offsetting the output signal to a precise mid-supply level is sometimes required (for example, 1.25V or 2.5V in a +5V single-supply configuration).

To accomplish this level shift, a low-impedance voltage source must be connected to the REF pin to level-shift the output so that the INA151 can drive a single-supply ADC.

This is accomplished using an external reference buffer configured in unity gain, voltage follower configuration as shown in Figure 8-1. Take into consideration that INA151D (G=1/4) imposes operating restrictions outlined in Section 7.3.3.

INA151 INA151 With External Reference Buffer Figure 8-1 INA151 With External Reference Buffer