JAJSP27A September   2022  – September 2023 TMAG5173-Q1

PRODUCTION DATA  

  1.   1
  2. 1 特長
  3. 2 アプリケーション
  4. 3 概要
  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, B1, C1, D1
    8. 6.8  Magnetic Characteristics For A2, B2, C2, D2
    9. 6.9  Magnetic Temp Compensation Characteristics
    10. 6.10 I2C Interface Timing
    11. 6.11 Power up Timing
    12. 6.12 Timing Diagram
    13. 6.13 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 Standby (Trigger) Mode
      2. 7.4.2 Sleep Mode
      3. 7.4.3 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 TMAG5173-Q1 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 Magnetic Threshold Band Cross Detection
      6. 8.1.6 Error Calculation During Linear Measurement
      7. 8.1.7 Error Calculation During Angular Measurement
    2. 8.2 Typical Applications
      1. 8.2.1 Angle Measurement
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 Gain Adjustment for Angle Measurement
        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. 8.3 Best Design Practices
    4. 8.4 Power Supply Recommendations
    5. 8.5 Layout
      1. 8.5.1 Layout Guidelines
      2. 8.5.2 Layout Example
  10. 9 デバイスおよびドキュメントのサポート
    1. 9.1 ドキュメントのサポート
      1. 9.1.1 Related Documentation
    2. 9.2 ドキュメントの更新通知を受け取る方法
    3. 9.3 サポート・リソース
    4. 9.4 商標
    5. 9.5 静電気放電に関する注意事項
    6. 9.6 用語集
  11. 10Mechanical, Packaging, and Orderable Information

7.5.2.4 Magnetic Sensor Offset Correction

The TMAG5173-Q1 enables offset correction for a pair of magnetic axes (see Figure 7-19). The MAG_OFFSET_CONFIG_1 and MAG_OFFSET_CONFIG_2 registers store the offset values to be corrected in 2's complement data format. As an example, if the uncorrected waveform for a particular axis has a value that is +2 mT too high, the offset correction value of –2 mT should be entered in the corresponding offset correction register. The selection and order of the sensors are defined in the ANGLE_EN register bits setting. The default value of these offset correction registers are set as zero.

TMAG5173-Q1 Magnetic Sensor Data Offset Correction Figure 7-19 Magnetic Sensor Data Offset Correction

Use Equation 16 to calculate the amount of offset for each axis. As an example, with a ±40 mT range, MAG_OFFSET_CONFIG_1 set at 1000 0000b, and MAG_OFFSET_CONFIG_2 set at 0001 0000b, the offset correction for the first axis is −2.5 mT and second axis is 0.312 mT.

Equation 16. ∆ O f f s e t = - D 7 × 2 7 + ∑ i = 0 6 D i × 2 i 2 12 × 2 B R

where

  • ΔOffset is the amount of offset correction to be applied in mT.
  • Di is the data bit in the MAG_OFFSET_CONFIG_1 or MAG_OFFSET_CONFIG_2 register.
  • BR is the magnetic range in mT for the corresponding channel.

Alternately, you can use Equation 17 to calculate the values for MAG_OFFSET_CONFIG_1 or MAG_OFFSET_CONFIG_2 for a target offset correction.

Equation 17. MAG_OFFSET = 212×∆Offset2BR

where

  • MAG_OFFSET is the decimal value to be entered in the MAG_OFFSET_CONFIG_1 or MAG_OFFSET_CONFIG_2 register.
  • ΔOffset is the amount of offset correction to be applied in mT.
  • BR is the magnetic range in mT for the corresponding channel.