TDK Corporation expands its Micronas 3D HAL sensor portfolio with the Hall effect sensors HAR 3900 and HAR 3930. The products enable stray-field compensated position detection in automotive and industrial applications while addressing the need for ISO 26262 compliant developments. Samples are available on request. The start of production begins in the second quarter of 2022.
According to ISO 26262, the sensors are SEooC and ASIL B ready, enabling ASIL D developments on the system level. They feature 3D magnetic-field measurement capability, 2D stray-field robust position detection; HAR 3930 has PWM and SENT (SAE J2716 rev. 4) output, additional switch output, and HAR 3900 offers measurement data available via a high-speed SPI interface. Both sensors are the dual-die SMD package versions of HAL 3900 and HAL 3930, and suit a wide range of applications, including steering-angle position detection, transmission position detection, shifter position detection, accelerator, and brake-pedal position detection.**
HAR 39xy sensors enable angular measurements up to 360° with ferrite 2-pole magnets in addition to linear measurements up to 35 mm by using two-pole bar magnets. The stray-field robust position detection can take both measurement types, with additional 3D measurements resulting in two independent angles for each die. HAR 3900 provides temperature-compensated raw values of the magnetic field in X, Y, and Z direction via the SPI interface while offering various low-power modes. Patented 3D HAL pixel-cell technology which accurately measures magnetic fields is the core of the HAR 39xy sensors.
With its flexible architecture, HAR 39xy offers a wide range of configuration possibilities and helps design engineers select the best operation mode for any given task. It features a powerful DSP responsible for fast signal processing, and an embedded microcontroller that performs the interface configuration and supervision of the Functional Safety-related tasks.
Each HAR 39xy sensor contains two independent dies placed upon each other that are mechanically separated and electrically insulated. The two dies measure almost the same magnetic field, therefore ensuring synchronous output signals. Redundant sensor solutions in a single package reduce system costs while at the same time increasing the reliability of the system due to smaller PCBs and fewer solder joints. The HAR 3900 and HAR 3930 are available in a small SSOP16 package.