SBAS645 August   2019 DRV5057-Q1

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 Sensitivity Linearity
      3. 7.3.3 Operating VCC Ranges
      4. 7.3.4 Sensitivity Temperature Compensation for Magnets
      5. 7.3.5 Power-On Time
      6. 7.3.6 Hall Element Location
    4. 7.4 Device Functional Modes
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Selecting the Sensitivity Option
      2. 8.1.2 Decoding a PWM
        1. 8.1.2.1 Decoding a PWM (Digital)
          1. 8.1.2.1.1 Capture and Compare Timer Interrupt
          2. 8.1.2.1.2 Oversampling and Counting With a Timer Interrupt
          3. 8.1.2.1.3 Accuracy and Resolution
        2. 8.1.2.2 Decoding a PWM (Analog)
    2. 8.2 Typical Applications
      1. 8.2.1 Full-Swing Orientation Example
        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 Half-Swing Orientation Example
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
    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

8.1.2.1.1 Capture and Compare Timer Interrupt

Many microcontrollers have a capture and compare timer mode that can simplify the PWM decoding process. Use the timer in capture and compare mode with an interrupt that triggers on both the rising and falling edges of the signal to obtain both the relative high (on) and low (off) time of the PWM. Make sure that the timer period is significantly faster than the period of the PWM, based on the desired resolution. Calculate the percent duty cycle (%D) of the PWM with Equation 1 by using the relative on and off time of the signal.

Equation 1. DRV5057-Q1 drv5057-equation-1.gif