SLYS048B March   2023  – August 2024 TMAG6181-Q1

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Magnetic Characteristics
    7. 5.7 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Magnetic Flux Direction
      2. 6.3.2 Sensors Location and Placement Tolerances
      3. 6.3.3 Magnetic Response
      4. 6.3.4 Parameters Definition
        1. 6.3.4.1 AMR Output Parameters
        2. 6.3.4.2 Transient Parameters
          1. 6.3.4.2.1 Power-On Time
        3. 6.3.4.3 Hall Sensor Parameters
        4. 6.3.4.4 Angle Accuracy Parameters
      5. 6.3.5 Automatic Gain Control (AGC)
      6. 6.3.6 Turns Counter
        1. 6.3.6.1 Rotation Tracking
      7. 6.3.7 Safety and Diagnostics
        1. 6.3.7.1 Device Level Checks
        2. 6.3.7.2 System Level Checks
    4. 6.4 Device Functional Modes
      1. 6.4.1 Operating Modes
        1. 6.4.1.1 Active Mode
        2. 6.4.1.2 Active-Turns Mode
        3. 6.4.1.3 Low-Power Mode
        4. 6.4.1.4 Sleep Mode
        5. 6.4.1.5 Fault Mode
  8. 7 Application and Implementation
    1. 7.1 Application Information
      1. 7.1.1 Power Supply as the Reference for External ADC
      2. 7.1.2 AMR Output Dependence on Airgap Distance
      3. 7.1.3 Calibration of Sensor Errors
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1 Designing with Multiple Sensors
          1. 7.2.2.1.1 Designing for Redundancy
          2. 7.2.2.1.2 Multiplexing Multiple Sensors
      3. 7.2.3 Application Curve
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Receiving Notification of Documentation Updates
    2. 8.2 Support Resources
    3. 8.3 Trademarks
    4. 8.4 Electrostatic Discharge Caution
    5. 8.5 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

Package Options

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

6.3.7 Safety and Diagnostics

The TMAG6181-Q1 supports several device and system level diagnostics features to detect, monitor, and report failures during the device operation.

In the event of a failure, the TMAG6181-Q1 is placed in a FAULT state, where the outputs from the AMR sensors are placed in a high-impedance state. See Device Functional Modes for fault state transition from different operation modes. As shown in the Application and Implementation section, users can add pullup or pulldown resistors on SIN_P, SIN_N, COS_P, and COS_N pins at the termination site (that is the microcontroller). The resistors are generally pulled up to supply voltage or pulled down to ground such that the ADC code on MCU is out of expected range. This state signal faults to the microcontroller.

The integrated turns counter has a valid range of 10% to 90% PWM output. If a fault is detected in the turns counter, then the output of the turns counter is at >95% PWM or <5% PWM. The external microcontroller can monitor if the turns counter is within expected range.

The TMAG6181-Q1 performs the following device and system level checks: