SLYS053A November   2023  – March 2024 TMAG3001

PRODMIX  

  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  Thermal Information
    4. 5.4  Recommended Operating Conditions
    5. 5.5  Electrical Characteristics
    6. 5.6  Temperature Sensor
    7. 5.7  Magnetic Characteristics For A1
    8. 5.8  Magnetic Characteristics For A2
    9. 5.9  Magnetic Temp Compensation Characteristics
    10. 5.10 I2C Interface Timing
    11. 5.11 Power up Timing
    12. 5.12 Timing Diagram
    13. 5.13 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 Magnetic Flux Direction
      2. 6.3.2 Sensor Location
      3. 6.3.3 Interrupt Function
      4. 6.3.4 Wake on Change
      5. 6.3.5 Device I2C Address
      6. 6.3.6 Magnetic Range Selection
      7. 6.3.7 Update Rate Settings
    4. 6.4 Device Functional Modes
      1. 6.4.1 Standby (Trigger) Mode
      2. 6.4.2 Sleep Mode
      3. 6.4.3 Wake-Up and Sleep (W&S) Mode
      4. 6.4.4 Continuous Measure Mode
    5. 6.5 Programming
      1. 6.5.1 I2C Interface
        1. 6.5.1.1 Conversion Trigger
        2. 6.5.1.2 Bus Transactions
          1. 6.5.1.2.1 Three Channels I2C Write
          2. 6.5.1.2.2 General Call Write
          3. 6.5.1.2.3 Standard I2C Read
          4. 6.5.1.2.4 I2C Read Command for 16-bit Data
          5. 6.5.1.2.5 I2C Read Command for 8-Bit Data
          6. 6.5.1.2.6 I2C Read CRC
      2. 6.5.2 Data Definition
        1. 6.5.2.1 Magnetic Sensor Data
        2. 6.5.2.2 Temperature Sensor Data
        3. 6.5.2.3 Magnetic Sensor Gain Correction
        4. 6.5.2.4 Magnetic Sensor Offset Correction
        5. 6.5.2.5 Angle and Magnitude Data Definition
        6. 6.5.2.6 Angle Offset Correction
  8. 7 Application and Implementation
    1. 7.1 Application Information
      1. 7.1.1 Select the Sensitivity Option
      2. 7.1.2 Temperature Compensation for Magnets
      3. 7.1.3 Sensor Conversion
        1. 7.1.3.1 Continuous Conversion
        2. 7.1.3.2 Trigger Conversion
        3. 7.1.3.3 Pseudo-Simultaneous Sampling
      4. 7.1.4 Magnetic Limit Check
      5. 7.1.5 Magnitude Limit Check
      6. 7.1.6 Angle Limit Check
      7. 7.1.7 Switch Mode
        1. 7.1.7.1 Unipolar Switch Mode
        2. 7.1.7.2 Omnipolar Switch Mode
        3. 7.1.7.3 Tamper Detection
        4. 7.1.7.4 Angle Switch
        5. 7.1.7.5 Magnitude Switch (Button Press Detection)
      8. 7.1.8 Error Calculation During Linear Measurement
      9. 7.1.9 Error Calculation During Angular Measurement
    2. 7.2 Typical Application
      1. 7.2.1 Angle Measurement
        1. 7.2.1.1 Design Requirements
        2. 7.2.1.2 Detailed Design Procedure
          1. 7.2.1.2.1 Gain Adjustment for Angle Measurement
        3. 7.2.1.3 Application Curves
    3. 7.3 Best Design Practices
    4. 7.4 Power Supply Recommendations
    5. 7.5 Layout
      1. 7.5.1 Layout Guidelines
      2. 7.5.2 Layout Example
  9. 8 Register Map
  10. 9 Device and Documentation Support
    1. 9.1 Documentation Support
      1. 9.1.1 Related Documentation
    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

Package Options

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

6.5.2.4 Magnetic Sensor Offset Correction

The TMAG3001 enables offset correction for a pair of magnetic axes.

Table 6-11 Register Field Settings to Configure for Magnetic Offsets
Register Name Register alias when ANGLE_EN[1:0] = 1h or 2h or 3h. Or THR_SEL[1:0] = 0h or 1h or 3hDescription

Sensor_Config_5

Offset_Config_1

Sets the offset for first channel

Sensor_Config_6

Offset_Config_2

Sets the offset for second channel

The offset correction is stored in 8-bit 2's complement format. 8-bit Magnetic Sensor Offset Correction Data Format shows example offset for Offset_Config_x where x can be the first or second channel. For the table, only three decimal places are shown. The data format is the same for Offset_Config_1[7:0] and Offset_Config_2[7:0]. The LSB size for each magnetic range is:

  • 40mT: 51.2LSB/mT
  • 80mT: 25.6LSB/mT
  • 120mT: 15.3985LSB/mT
  • 240mT: 7.70LSB/mT
Table 6-12 8-Bit Magnetic Sensor Offset Correction Data Format.
Magnetic Offset (mT)Offset_Config_x[7:0]
Range = 40mTRange = 80mTRange = 120mTRange = 240mTBINARYHEX
–2.5–5–8.313–16.6251000 000080h
–1.992–3.984–6.624–13.2481001 10109Ah
–0.019–0.039–0.065–0.1301111 1111FFh
00000000 000000h
0.0190.0390.0650.1300000 000101h
1.9923.9846.62413.2480110 011066h
2.4804.9618.24816.4950111 11117Fh

As an example, if the uncorrected waveform for a particular axis has a value that is offset by 2mT, enter the offset correction value of –2mT in the corresponding Offset_Config_x[7:0] bit field. This value is added to the measured field before (or after) any gain setting is applied. 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, when offset correction is enabled.