SBOS576C May   2012  – September 2026 INA3221

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
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Basic ADC Functions
      2. 7.3.2 Alert Monitoring
        1. 7.3.2.1 Critical Alert
          1. 7.3.2.1.1 Summation Control Function
        2. 7.3.2.2 Warning Alert
        3. 7.3.2.3 Power-Valid Alert
        4. 7.3.2.4 Timing-Control Alert
        5. 7.3.2.5 Default Settings
      3. 7.3.3 Software Reset
    4. 7.4 Device Functional Modes
      1. 7.4.1 Averaging Function
      2. 7.4.2 Multiple Channel Monitoring
        1. 7.4.2.1 Channel Configuration
        2. 7.4.2.2 Averaging and Conversion-Time Considerations
      3. 7.4.3 Filtering and Input Considerations
    5. 7.5 Programming
      1. 7.5.1 Bus Overview
        1. 7.5.1.1 Serial Bus Address
        2. 7.5.1.2 Serial Interface
      2. 7.5.2 Writing To and Reading From the INA3221
        1. 7.5.2.1 High-Speed I2C Mode
      3. 7.5.3 SMBus Alert Response
  9. 8 Register Maps
    1. 8.1 Summary of Register Set
    2. 8.2 Register Descriptions
      1. 8.2.1  Configuration Register (address = 00h) [reset = 7127h]
      2. 8.2.2  Channel-1 Shunt-Voltage Register (address = 01h), [reset = 00h]
      3. 8.2.3  Channel-1 Bus-Voltage Register (address = 02h) [reset = 00h]
      4. 8.2.4  Channel-2 Shunt-Voltage Register (address = 03h) [reset = 00h]
      5. 8.2.5  Channel-2 Bus-Voltage Register (address = 04h) [reset = 00h]
      6. 8.2.6  Channel-3 Shunt-Voltage Register (address = 05h) [reset = 00h]
      7. 8.2.7  Channel-3 Bus-Voltage Register (address = 06h) [reset = 00h]
      8. 8.2.8  Channel-1 Critical-Alert Limit Register (address = 07h) [reset = 7FF8h]
      9. 8.2.9  Warning-Alert Channel-1 Limit Register (address = 08h) [reset = 7FF8h]
      10. 8.2.10 Channel-2 Critical-Alert Limit Register (address = 09h) [reset = 7FF8h]
      11. 8.2.11 Channel-2 Warning-Alert Limit Register (address = 0Ah) [reset = 7FF8h]
      12. 8.2.12 Channel-3 Critical-Alert Limit Register (address = 0Bh) [reset = 7FF8h]
      13. 8.2.13 Channel-3 Warning-Alert Limit Register (address = 0Ch) [reset = 7FF8h]
      14. 8.2.14 Shunt-Voltage Sum Register (address = 0Dh) [reset = 00h]
      15. 8.2.15 Shunt-Voltage Sum-Limit Register (address = 0Eh) [reset = 7FFEh]
      16. 8.2.16 Mask/Enable Register (address = 0Fh) [reset = 0002h]
      17. 8.2.17 Power-valid Upper-limit Register (address = 10h) [reset = 2710h]
      18. 8.2.18 Power-Valid Lower-Limit Register (address = 11h) [reset = 2328h]
      19. 8.2.19 Manufacturer ID Register (address = FEh) [reset = 5449h]
      20. 8.2.20 Die ID Register (address = FFh) [reset = 3220]
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
      3. 9.2.3 Application Curves
    3. 9.3 Power Supply Recommendations
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
      2. 9.4.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Device Support
      1. 10.1.1 Development Support
    2. 10.2 Documentation Support
      1. 10.2.1 Related Documentation
    3. 10.3 Receiving Notification of Documentation Updates
    4. 10.4 Support Resources
    5. 10.5 Trademarks
    6. 10.6 Electrostatic Discharge Caution
    7. 10.7 Glossary
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information

8.2.19 Manufacturer ID Register (address = FEh) [reset = 5449h]

This register contains a factory-programmable identification value that identifies this device as being manufactured by Texas Instruments. This register distinguishes this device from other devices that are on the same I2C bus. The contents of this register are 5449h, or TI in ASCII.

Table 8-39 Manufacturer ID Register
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
R-0 R-1 R-0 R-1 R-0 R-1 R-0 R-0 R-0 R-1 R-0 R-0 R-1 R-0 R-0 R-1
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
Table 8-40 Manufacturer ID Register Field Descriptions
Bit Field Type Reset Description
15-0 D15-0 R 5449h Manufacturer ID bits