SBAA463A january   2021  – april 2023 TMAG5170 , TMAG5170-Q1 , TMAG5170D-Q1 , TMAG5173-Q1 , TMAG5273

 

  1.   Abstract
  2.   Trademarks
  3. 1Introduction
    1. 1.1 Angle Measurement With One-Dimensional Sensors
    2. 1.2 Challenges of Angular Measurements
  4. 2Benefit of Multi-Axis Sensors
    1. 2.1 Simplified Mechanical Placement
    2. 2.2 Sensitivity Matching
    3. 2.3 CORDIC Angle Estimations
    4. 2.4 Tamper and Stray Field Detection
  5. 3Angular Measurement Considerations
    1. 3.1 Sensor Alignment
    2. 3.2 Sensor Calibration
    3. 3.3 Input Referred Noise
    4. 3.4 Impact of Sample Rate
  6. 4Practical Application
    1. 4.1 Push-Button Knob
      1. 4.1.1 Evaluating Design Constraints
      2. 4.1.2 Magnet Selection
      3. 4.1.3 Prototyping and Verification
    2. 4.2 Off-Axis Design
      1. 4.2.1 Sensitivity Gain Correction
      2. 4.2.2 Accuracy Verification
  7. 5Summary
  8. 6References
  9. 7Revision History

4 Practical Application

To help demonstrate this function, consider a few approaches to a simple rotary magnet which could be used in any number of applications, such as an e-shifter dial or a sensor attached to the motor of a robotic arm working in an automated factory. For this analysis we will attempt measurements using both an On-Axis and Off-Axis approach to demonstrate the design process.