SBOS547A June   2011  – August 2015 INA226

PRODUCTION DATA.  

  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Pin Configuration and Functions
  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
  7. Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Basic ADC Functions
        1. 7.3.1.1 Power Calculation
        2. 7.3.1.2 Alert Pin
    4. 7.4 Device Functional Modes
      1. 7.4.1 Averaging and Conversion Time Considerations
      2. 7.4.2 Filtering and Input Considerations
    5. 7.5 Programming
      1. 7.5.1 Programming the Calibration Register
      2. 7.5.2 Programming the Power Measurement Engine
        1. 7.5.2.1 Calibration Register and Scaling
      3. 7.5.3 Simple Current Shunt Monitor Usage (No Programming Necessary)
      4. 7.5.4 Default Settings
      5. 7.5.5 Bus Overview
        1. 7.5.5.1 Serial Bus Address
        2. 7.5.5.2 Serial Interface
        3. 7.5.5.3 Writing to and Reading from the INA226
          1. 7.5.5.3.1 High-Speed I2C Mode
        4. 7.5.5.4 SMBus Alert Response
    6. 7.6 Register Maps
      1. 7.6.1  Configuration Register (00h) (Read/Write)
      2. 7.6.2  Shunt Voltage Register (01h) (Read-Only)
      3. 7.6.3  Bus Voltage Register (02h) (Read-Only)
      4. 7.6.4  Power Register (03h) (Read-Only)
      5. 7.6.5  Current Register (04h) (Read-Only)
      6. 7.6.6  Calibration Register (05h) (Read/Write)
      7. 7.6.7  Mask/Enable Register (06h) (Read/Write)
      8. 7.6.8  Alert Limit Register (07h) (Read/Write)
      9. 7.6.9  Manufacturer ID Register (FEh) (Read-Only)
      10. 7.6.10 Die ID Register (FFh) (Read-Only)
  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
  9. Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Development Support
    2. 11.2 Community Resources
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

パッケージ・オプション

メカニカル・データ(パッケージ|ピン)
  • DGS|10
発注情報

1 Features

  • Senses Bus Voltages From 0 V to 36 V
  • High-Side or Low-Side Sensing
  • Reports Current, Voltage, and Power
  • High Accuracy:
    • 0.1% Gain Error (Max)
    • 10 μV Offset (Max)
  • Configurable Averaging Options
  • 16 Programmable Addresses
  • Operates from 2.7-V to 5.5-V Power Supply
  • 10-Pin, DGS (VSSOP) Package

2 Applications

  • Servers
  • Telecom Equipment
  • Computing
  • Power Management
  • Battery Chargers
  • Power Supplies
  • Test Equipment

3 Description

The INA226 is a current shunt and power monitor with an I2C™- or SMBUS-compatible interface. The device monitors both a shunt voltage drop and bus supply voltage. Programmable calibration value, conversion times, and averaging, combined with an internal multiplier, enable direct readouts of current in amperes and power in watts.

The INA226 senses current on common-mode bus voltages that can vary from 0 V to 36 V, independent of the supply voltage. The device operates from a single 2.7-V to 5.5-V supply, drawing a typical of 330 μA of supply current. The device is specified over the operating temperature range between –40°C and 125°C and features up to 16 programmable addresses on the I2C-compatible interface.

Device Information(1)

PART NUMBERPACKAGEBODY SIZE (NOM)
INA226VSSOP (10)3.00 mm x 3.00 mm
  1. For all available packages, see the orderable addendum at the end of the datasheet.

High-Side or Low-Side Sensing Application

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