SBAS933D December   2020  – June 2022 TMAG5110 , TMAG5111

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Magnetic Characteristics
    7. 7.7 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 2D Description
        1. 8.3.1.1 2D General Description and Advantages
        2. 8.3.1.2 2D Magnetic Sensor Response
        3. 8.3.1.3 Axis Polarities
      2. 8.3.2 Axis Options
        1. 8.3.2.1 Device Placed In-Plane to Magnet
        2. 8.3.2.2 Device Placed on the Side Edge of the Magnet
      3. 8.3.3 Power-On Time
      4. 8.3.4 Propagation Delay
      5. 8.3.5 Hall Element Location
      6. 8.3.6 Power Derating
    4. 8.4 Device Functional Modes
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 Incremental Rotary Encoding Application
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
        3. 9.2.1.3 Application Curve
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Receiving Notification of Documentation Updates
    2. 12.2 Support Resources
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • DBV|5
Thermal pad, mechanical data (Package|Pins)
Orderable Information

8.3.4 Propagation Delay

The TMAG511x samples the Hall element at a nominal sampling interval of tPD to detect the presence of a magnetic south pole. Between each sampling interval, the device calculates the average magnetic field applied to the device. As defined in Figure 8-20, if this average value crosses the BOP or BRP threshold, the device changes the corresponding level. Because the system, Hall sensor + magnet is by nature asynchronous, the propagation delay td will vary depending on when the magnetic field goes above the BOP value. As shown in Figure 8-19 the output delay will then depend on when the magnetic field will get higher than the BOP value. The first graph shows the typical case.

The magnetic field goes above the BOP value at the moment where the output is updated. The part will then only need one cycle of tPD to update the output. The second graph shows a magnetic field going above the BOP value just right before half of the sampling period. This is the best case possible where the output will be updated in just half of the sampling period. Finally, the third graph shows the worst possible case where the magnetic field goes above the BOP value just after half of the sampling period. At the next output update, the value will still see a value under the threshold and will need a whole new period to update the output

GUID-2A1468F3-C385-4D24-AA92-748872F12454-low.gif Figure 8-19 Field Sampling Timing

Figure 8-20 shows TMAG511x propagation delay analysis when a magnetic south pole is applied. The Hall element of the TMAG511x experiences an increasing magnetic field as a magnetic south pole approaches near the device as well as a decreasing magnetic field as a magnetic south pole leaves away. At time t1 the magnetic field goes above the BOP threshold. The output will then start to move after the time tPD. As shown in Figure 8-20, this time will vary depending on when the sampling period is. At t2 the output start pulling to the low voltage value. At t3 the output is completely pulled down to the lower voltage value. The same process happen on the other way when the magnetic value is going under the BOP threshold.

GUID-1961C15D-A7ED-4F43-A8FB-6E4B35DF579D-low.gif Figure 8-20 Propagation Delay