SBAS915A June   2018  – April 2019 DRV5015

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Typical Schematic
      2.      Magnetic Response
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Magnetic Characteristics
    7. 6.7 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Magnetic Flux Direction
      2. 7.3.2 Magnetic Response
      3. 7.3.3 Output Driver
      4. 7.3.4 Power-On Time
      5. 7.3.5 Hall Element Location
      6. 7.3.6 Propagation Delay
    4. 7.4 Device Functional Modes
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 BLDC Motor Sensors Application
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Application Curve
      2. 8.2.2 Incremental Rotary Encoding Application
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
        3. 8.2.2.3 Application Curve
    3. 8.3 What to Do and What Not to Do
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Community Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

7.3.6 Propagation Delay

The DRV5015 samples the Hall element at a nominal sampling interval of every 16.67 µs to detect the presence of a magnetic north or south pole. At each sampling point, the device takes the average of the current sampled value and immediately preceding sampled value of the magnetic field. If this average value crosses the BOP or BRP threshold, the device output changes to the corresponding state as defined by the Overview section.

Figure 17 shows the DRV5015A1 propagation delay analysis in the proximity of a magnetic south pole. The Hall element of the DRV5015 experiences an increasing magnetic field as a magnetic south pole approaches near the device. At time t2, the average magnetic field is (B2 + B1) / 2, which is below the BOP threshold of the device. At time t3, the actual magnetic field has crossed the BOP threshold. However, the average (B3 + B2) / 2 is still less than the BOP threshold. As such, the device waits for next sample time, t4, to start the output transition through the analog signal chain. The propagation delay, td, is measured as the delay from the time the magnetic field crosses the BOP threshold to the time output transitions.

DRV5015 drv5015-propagation-delay.gifFigure 17. Propagation Delay