SBAA449B October   2020  – October 2021 TMAG5110 , TMAG5110-Q1 , TMAG5111 , TMAG5111-Q1

 

  1.   Trademarks
  2. 1Introduction
  3. 2Latch Response of the 2D Hall Effect
  4. 3Two Axis Sensor Consideration
    1. 3.1 Magnet Selection
      1. 3.1.1 Pole Count
      2. 3.1.2 Magnet Strength
    2. 3.2 Sensor Selection
      1. 3.2.1 Axes of Sensitivity
        1. 3.2.1.1 In-Plane Sensor Alignment
        2. 3.2.1.2 Out-Of Plane Sensor Alignment
      2. 3.2.2 Sensor Placement
        1. 3.2.2.1 On-Axis Magnetic Field
        2. 3.2.2.2 In-Plane Magnetic Field
        3. 3.2.2.3 Out-of-Plane Magnetic Field
      3. 3.2.3 Sensitivity Selection
  5. 4Optimizing for Accuracy
    1. 4.1 Optimizing Placement for Accuracy
    2. 4.2 Optimizing a Magnet for Accuracy
  6. 5Application Implementation
  7. 6Summary
  8. 7References
  9. 8Revision History

3.2.1.2 Out-Of Plane Sensor Alignment

With the sensor placed outside of the plane of the magnet ring, there will be a reduction to the observed amplitudes for each component of the B-Field when using an fixed air gap. As a result, there is reduced flexibility for the distance between the sensor and magnet. High sensitivity devices (or devices with a low BOP threshold) allow the application to continue to detect pole transitions even when the device is placed beneath the outer edge. This is particularly helpful in situations where space is limited and the sensor must fit within the magnet diameter.

Option A - X and Y axes enable the sensor to be positioned facing the side edge of the magnet. It can also be placed with the side edge of the sensor facing the side of the magnet. The device can also be turned at 180° along the Z axis.
GUID-E5FECA8D-763E-498D-A89D-E500EE424F0C-low.pngFigure 3-12 XY Side Edge 1
GUID-2A8631A2-5AF6-4B4E-A88A-078524D59AC2-low.pngFigure 3-13 XY Side Edge 2
Option B - Z and X axes enable the sensor to be positioned facing the side edge of the magnet or the top of the package facing the side edge of the magnet. The device can
also be turned at 180° along the Z axis.
GUID-787F917B-2D43-49EE-83C1-3D9C02052261-low.pngFigure 3-14 ZX Side Edge 1
GUID-63B3ECB2-A8A3-4846-B614-0CD0AA4A4E7E-low.pngFigure 3-15 ZX Side Edge 2
Option C - Z and Y axes enable the sensor to be positioned facing the side edge of the magnet or the top of the package facing the side edge of the magnet. The device can
also be turned at 180° along the Z axis.
GUID-47EAB3A3-5F5E-4D99-B3C7-12E444184E50-low.pngFigure 3-16 ZY Side Edge 1
GUID-56C8BFE4-9DE1-41C6-8452-D4662B75E3E4-low.pngFigure 3-17 ZY Side Edge 1