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

Abstract

As the demand for automated precision control systems increases there is a similar increase to design systems that are more reliable and less likely to fail from mechanical wear. Many of these applications require the detection of angular rotation. While this function can be implemented using multiple one-dimensional sensors, a new class of three-dimensional sensors offers more flexibility and accuracy while allowing more compact designs.