JAJSNP8A March   2023  – February 2024 TMAG6181-Q1

PRODUCTION DATA  

  1.   1
  2. 1 特長
  3. 2 アプリケーション
  4. 3 概要
  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 ドキュメントの更新通知を受け取る方法
    2. 8.2 サポート・リソース
    3. 8.3 Trademarks
    4. 8.4 静電気放電に関する注意事項
    5. 8.5 用語集
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

パッケージ・オプション

メカニカル・データ（パッケージ｜ピン）
サーマルパッド・メカニカル・データ
発注情報

6.3.3 Magnetic Response

The AMR sensor has two components that are sensitive to the in-plane magnetic field X and Y axes parallel to the chip surface. Figure 6-4 shows the AMR sensor with the differential sine and cosine outputs SIN_P, SIN_N, COS_P and COS_N. The outputs have an electrical range of 180 degrees. If the mechanical angle between the sensor reference and the direction of the magnetic field is θ, then the AMR outputs correspond to cosine 2θ and sine 2θ, respectively. For every 360° rotation of the external magnetic field, the AMR outputs provide two periods at 180° sensing range for each period. Hence, for a dipole magnet rotating at speed of f, the electrical output from the AMR sensor outputs can be at twice the frequency at 2f. Use Equation 1 to calculate the angle of the magnetic field using an arctangent2 function.

Equation 1. θ = a r c t a n 2   ( V s i n V c o s   ) 2

where

  • Vsin is the sine output
  • Vcos is the cosine output

The AMR sensor is sensitive only to the direction of the magnetic field and has a wide operating magnetic field range. The voltage levels of the AMR outputs are independent of the absolute flux density as long as the magnetic flux density is above the minimum recommended operating fields.

GUID-20220627-SS0I-KMQL-FDHV-28KZX1NZN7XS-low.svg Figure 6-4 AMR Sensor Outputs Magnetic Response

Figure 6-5 shows the two integrated Hall sensors X and Y that are sensitive to the in-plane X and Y axes similar to the AMR sensor. The outputs Q1 and Q0 shows the digital outputs of both these sensors, respectively. Figure 6-5 shows both the Hall outputs reacting to the input field by going low when the field is higher than operating point (BOP) and going high when the field is lower than returning point (BRP).

GUID-20220627-SS0I-SNDT-JH9G-XRGK1QLGSG6X-low.svg Figure 6-5 Hall Sensor Magnetic Response

For a rotating input magnetic field, with the Y and X components of BSIN and BCOS respectively, Figure 6-6 shows the response of the AMR and Hall sensors. The integrated X and Y Hall sensors provide digital outputs (Q1 and Q0, respectively). See the Functional Block Diagram. The Hall sensors have a 360° angle range compared to the 180° angle range of the AMR sensors.

GUID-20231108-SS0I-FQQ9-CH2J-LTGCNV3G45HH-low.svg Figure 6-6 Magnetic Response of AMR and Hall Sensors