SBAA539A march   2022  – may 2023 TMAG5170 , TMAG5170-Q1 , TMAG5170D-Q1 , TMAG5173-Q1 , TMAG5273

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Magnet Selection
    1. 2.1 Placement Considerations
    2. 2.2 Magnet Properties
  6. 3Measurement Non-Linearity
  7. 4Mechanical Error Sources
  8. 5Signal Chain Errors
  9. 6Calibration Methods
  10. 7Revision History

2 Magnet Selection

Of initial important when designing for any angle measurement using magnetic inputs (Hall-effect, AMR, GMR, TMR) is the magnet used as an input source. Depending on the directional sensitivity of the sensor, it can be important to verify adequate field inputs are present for the sensor to operate normally.

Consider briefly TMAG5170, TMAG5173-Q1, TMAG5273, or TMAG5170D-Q1. These devices are linear three dimensional (3D) Hall-effect sensors. TMAG5170 and TMAG5170D-Q1 use an SPI, while TMAG5273 and TMAG5173-Q1 communicate using I2C. With sensitivity in all three axes the sensor placement is flexible for either sensor.

GUID-20210311-CA0I-VGS6-ZMHK-BXHWHP06PK50-low.pngFigure 2-1 Sensor Placement Options