TDK Corporation has introduced the Micronas HAL/HAR 35xy series of stray-field robust 2D Hall-effect position sensors. Designed for automotive and industrial use, the new sensor family is derived from the existing HAL/HAR 39xy platform but tailored for applications requiring a simplified feature set without compromising functional safety or measurement precision.
The first two devices in the family include the single-die HAL 3550 and the dual-die HAR 3550, which incorporates full redundancy within a single package. Both are designed as Safety Element out of Context (SEooC) and are ASIL C ready, complying with ISO 26262 functional safety standards. Start of production is scheduled for June 2025, with samples already available.
HAL/HAR 3550 sensors provide analog (12-bit ratiometric), PWM, SENT, and open-drain switch output options. PWM outputs can operate between 0.1 kHz and 2 kHz. The SENT interface supports SAE J2716 rev. 4 with programmable tick time and frame formatting. Switch outputs are derived from processed position data or parameters like temperature and field amplitude, with user-defined logic and thresholds.
The sensors can detect full 360° angular and linear magnetic position. They support modular segmentation for sub-ranges (90°, 120°, or 180°), allowing flexibility in chassis or actuator applications. Magnetic-field sensing is achieved using vertical and horizontal Hall plate arrays, optimized to suppress external stray fields. A basic two-pole ferrite magnet is sufficient for rotation angle detection in end-of-shaft configurations.
Each sensor includes on-chip signal processing for converting magnetic-field vector data into analog or digital outputs. Calibration parameters such as gain, offset, and reference position are stored in non-volatile memory, which is programmable via the sensor output pin.
Designed to operate within a –40 °C to +150 °C ambient range, the HAL 3550 is housed in an SOIC8 SMD package, while the HAR 3550 comes in a TSSOP16 package. Both include voltage protection features such as overvoltage, undervoltage, and reverse-voltage safeguards.
The Micronas HAL/HAR 35xy series is suitable for use in safety-critical automotive systems such as accelerator and brake pedal positions, steering angle sensing, transmission detection, and chassis height measurement.
For more information, please click here.
About TDK Corporation
TDK Corporation is a Tokyo-based global provider of electronic components and solutions for the automotive, industrial, and ICT sectors. Founded in 1935 to commercialize ferrite materials, the company has since expanded into sensors, actuators, power supplies, and energy devices. Its brands include TDK, EPCOS, InvenSense, Micronas, Tronics, and TDK-Lambda. TDK operates globally with more than 100,000 employees and reported sales of USD 14.6 billion in fiscal 2024.
Source/Photo Credit: TDK Corporation
(Editor’s Note: All trademarks mentioned in this article, including company names, product names, and logos, are the property of their respective owners. Use of these trademarks is for informational purposes only and does not imply any endorsement.)
