SBOS743B July   2015  – September 2024 INA226-Q1

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 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Basic ADC Functions
        1. 6.3.1.1 Power Calculation
        2. 6.3.1.2 Alert Pin
    4. 6.4 Device Functional Modes
      1. 6.4.1 Averaging and Conversion Time Considerations
      2. 6.4.2 Filtering and Input Considerations
    5. 6.5 Programming
      1. 6.5.1 Programming the Calibration Register
      2. 6.5.2 Programming the Power Measurement Engine
        1. 6.5.2.1 Calibration Register and Scaling
      3. 6.5.3 Simple Current Shunt Monitor Usage (No Programming Necessary)
      4. 6.5.4 Default Settings
      5. 6.5.5 Bus Overview
        1. 6.5.5.1 Serial Bus Address
        2. 6.5.5.2 Serial Interface
        3. 6.5.5.3 Writing to and Reading From the INA226-Q1
          1. 6.5.5.3.1 High-Speed I2C Mode
        4. 6.5.5.4 SMBus Alert Response
  8. 7 Registers
    1. 7.1 Register Maps
      1. 7.1.1  Configuration Register (00h) (Read/Write)
      2. 7.1.2  Shunt Voltage Register (01h) (Read-Only)
      3. 7.1.3  Bus Voltage Register (02h) (Read-Only) #GUID-792F23A7-1E45-4FB9-9334-0BF769622DE4/SBOS5477597
      4. 7.1.4  Power Register (03h) (Read-Only)
      5. 7.1.5  Current Register (04h) (Read-Only)
      6. 7.1.6  Calibration Register (05h) (Read/Write)
      7. 7.1.7  Mask/Enable Register (06h) (Read/Write)
      8. 7.1.8  Alert Limit Register (07h) (Read/Write)
      9. 7.1.9  Manufacturer ID Register (FEh) (Read-Only)
      10. 7.1.10 Die ID Register (FFh) (Read-Only)
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 High-Side Sensing Circuit Application
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 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
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

7.1.6 Calibration Register (05h) (Read/Write)

This register provides the device with the value of the shunt resistor that is present to create the measured differential voltage. The register also sets the resolution of the Current Register. Programming this register sets the Current_LSB and the Power_LSB. This register is also used in overall system calibration. See the Programming the Calibration Register for additional information on programming the Calibration Register.

Table 7-11 Calibration Register (05h) (Read/Write) Description
BIT #D15D14D13D12D11D10D9D8D7D6D5D4D3D2D1D0
BIT
NAME		—FS14FS13FS12FS11FS10FS9FS8FS7FS6FS5FS4FS3FS2FS1FS0
POR VALUE0000000000000000