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3D Position Sensors Precise, Stray-Field-Robust Position Measurement for Automotive And Industry

From Rutronik | Translated by AI 2 min Reading Time

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Rutronik Elektronische Bauelemente AG
FAULHABER Drive Systems

Ideal for safety-critical applications: The position sensor series HAL 39xy, HAC 39xy, and HAR 39xy—ASIL-C-ready.

(Image: Rutronik)
(Image: Rutronik)

Rutronik includes the HAL 39xy, HAC 39xy, and HAR 39xy series from TDK Micronas in its portfolio of 3D position sensors. These products enable highly precise, stray-field-resistant linear and rotary position measurements and are based on the proven 3D-HAL® technology. Through monolithic integration into the CMOS process and the use of vertical and horizontal Hall plates with reduced parasitic effects, the sensors are particularly suitable for safety-critical automotive and industrial applications. Thanks to integrated stray-field compensation, they deliver reliable measurement results even in challenging EMC environments. The specified temperature range of –40 °F to about 300 °F as well as the ISO-26262-ASIL-C-ready concept highlight their suitability for high-reliability systems. The various variants are now available at www.rutronik24.com.

The sensor family enables 360° angle measurements as well as linear measurement ranges of up to 1.4 inches with a supply voltage of 3 V to 20 V. It supports a wide variety of industrial and automotive digital interfaces such as SPI, SENT, PWM, SPC, PSI5, as well as analog outputs. All types are available in different package variants: SOIC8 (HAL 39xy), TO92UF (HAC 39xy), and SSOP16 (HAR 39xy).

Key features include true 3D capability, the unique stray field concept for various magnetic setups (rotational, linear, axial, radial), and high robustness due to the optimized Hall plate architecture. The sensors achieve stray field robustness of up to 4 kA/m and offer configurable sleep modes for energy-optimized applications.

Another advantage is the programmable memory, which enables customer-specific calibration during production. Thanks to its flexible architecture, a single hardware platform can handle multiple magnetic setups—a significant advantage over comparable solutions and ideal for applications such as autonomous driving, highly sensitive industrial actuators, or modern steering and control systems.

Benefits at A Glance:

  • 360° angle and linear position measurement
  • True 3D position detection with high stray field robustness
  • ASIL-C-ready according to ISO 26262
  • Supply voltage: 3 V—20 V
  • Flexible digital interfaces (SPI, SENT, SPC, PSI5, PWM, analog)
  • Angular accuracies < 0.12°—meets the requirements of the industry
  • ESD and EMC optimized design
  • Programmable memory for individual calibration

Application Examples:

  • Chassis and valve position control
  • Boost pressure actuators and EGR systems
  • Transmission and clutch position controls
  • Steering angle and pedal position controls
  • Fuel level and brake stroke measurement

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