SLYS045A June   2021  – September 2021 TMAG5273

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Revision History
  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  Temperature Sensor
    7. 6.7  Magnetic Characteristics For A1
    8. 6.8  Magnetic Characteristics For A2
    9. 6.9  Magnetic Temp Compensation Characteristics
    10. 6.10 I2C Interface Timing
    11. 6.11 Power up & Conversion Time
    12. 6.12 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 Magnetic Flux Direction
      2. 7.3.2 Sensor Location
      3. 7.3.3 Interrupt Function
      4. 7.3.4 Device I2C Address
      5. 7.3.5 Magnetic Range Selection
      6. 7.3.6 Update Rate Settings
    4. 7.4 Device Functional Modes
      1. 7.4.1 Stand-by (Trigger) Mode
      2. 7.4.2 Sleep Mode
      3. 7.4.3 Wake-up and Sleep (W&S) Mode
      4. 7.4.4 Continuous Measure Mode
    5. 7.5 Programming
      1. 7.5.1 I2C Interface
        1. 7.5.1.1 SCL
        2. 7.5.1.2 SDA
        3. 7.5.1.3 I2C Read/Write
          1. 7.5.1.3.1 Standard I2C Write
          2. 7.5.1.3.2 General Call Write
          3. 7.5.1.3.3 Standard 3-Byte I2C Read
          4. 7.5.1.3.4 1-Byte I2C Read Command for 16-Bit Data
          5. 7.5.1.3.5 1-Byte I2C Read Command for 8-Bit Data
          6. 7.5.1.3.6 I2C Read CRC
      2. 7.5.2 Data Definition
        1. 7.5.2.1 Magnetic Sensor Data
        2. 7.5.2.2 Temperature Sensor Data
        3. 7.5.2.3 Angle and Magnitude Data Definition
        4. 7.5.2.4 Magnetic Sensor Offset Correction
    6. 7.6 Register Map
      1. 7.6.1 TMAG5273 Registers
  9. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Select the Sensitivity Option
      2. 8.1.2 Temperature Compensation for Magnets
      3. 8.1.3 Sensor Conversion
        1. 8.1.3.1 Continuous Conversion
        2. 8.1.3.2 Trigger Conversion
        3. 8.1.3.3 Pseudo-Simultaneous Sampling
      4. 8.1.4 Magnetic Limit Check
      5. 8.1.5 Error Calculation During Linear Measurement
      6. 8.1.6 Error Calculation During Angular Measurement
    2. 8.2 Typical Application
      1. 8.2.1 Magnetic Tamper Detection
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Application Curves
      2. 8.2.2 I2C Address Expansion
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
      3. 8.2.3 Angle Measurement
        1. 8.2.3.1 Design Requirements
        2. 8.2.3.2 Detailed Design Procedure
          1. 8.2.3.2.1 Gain Adjustment for Angle Measurement
        3. 8.2.3.3 Application Curves
    3. 8.3 What to Do and What Not to Do
  10. 9 Power Supply Recommendations
  11. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  12. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Support Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  13. 12Mechanical, Packaging, and Orderable Information

Package Options

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

7.5.2.3 Angle and Magnitude Data Definition

The TMAG5273 calculates the angle from a pair of magnetic axes based off the ANGLE_EN register bits setting. Figure 7-17 shows the angle information stored in the ANGLE_RESULT_MSB and ANGLE_RESULT_LSB registers. Bits D04-D12 store angle integer value from 0 to 360 degree. Bits D00-D03 store fractional angle value. The 3-MSB bits are always populated as b000. The angle can be calculated using Equation 14.

Equation 14. A = ∑ i = 4 12 D i × 2 i - 4 + ∑ i = 0 3 D i × 2 i 16

where

  • A is the angle measured in degree.
  • Di is the data bit as shown in Figure 7-17.

For example: a 354.50 degree is populated as 0001 0110 0010 1000b and a 17.25 degree is populated as 000 0001 0001 0100b.

GUID-C7BDC67F-675A-4B66-A2D8-48B5EEC8F936-low.gif Figure 7-17 Angle Data Definition

During the angle calculation, use Equation 15 to calculate the resultant vector magnitude.

Equation 15. M = M A D C C h 1 2 + M A D C C h 2 2

where

  • MADCCh1, MADCCh2 are the ADC codes of the two magnetic channels selected for the angle calculation.

Figure 7-18 shows the magnitude value stored in the MAGNITUDE_RESULT register. For on-axis angular measurement the magnitude value should remain constant across the full 360° measurement.

GUID-20210604-CA0I-LG9Z-GWSL-ZRDSQN7Z3HSM-low.svg Figure 7-18 Magnitude Result Data Definition