3D HAL-based position sensor has SENT interface
A Hall-effect sensor by TDK, the HAL 83927, is based on 3D HAL technology. The position sensor has a linear ratiometric analogue output with integrated wire break detection. It also has a SENT (single edge nibble transmission) interface with SENT protocol according to SAE J2716 rev. 4
It is also claimed to offer superior angular measurement and ISO 26262 compliant development to support safety critical automotive and industrial applications in a small SOIC8 surface mount package.
The HAL 83927 has been added to the company’s portfolio of Micronas direct angle, Hall-effect sensor family. with the new HAL® 3927* sensor for automotive and industrial applications.
Samples are available now with the start of production planned for Q1 2024.
The high resolution position sensor for position measurements. Its versatile programming characteristics and high accuracy mean that the HAL 3927 is suitable for linear movement measurements in transmissions, in clutch pedals, as an engine stroke sensor, for liquid level sensing, and for cylinder and valve position measurements, said TDK.
It is also well suited for rotary position measurement in gear selectors, as a rotary selector with push function or in rear-axis. Its accurate integrated temperature sensor allows customers to replace other external temperature sensors if the application is using the SENT interface, explained TDK.
The HAL 3927 can measure horizontal and vertical magnetic-field components BX, BY and BZ. Based on the signals of two out of three magnetic field components, the device can measure 360 degrees angular range and linear movements. On-chip signal processing calculates one angle out of two orthogonal magnetic field components and converts this value into an output signal. In addition to the integral signal processing, the sensor features an arbitrary programmable output characteristic, e.g., for linearisation of the output signal via up to 33 setpoints (17 variable- or 33 fixed). Major characteristics like gain and offset, reference position, etc. can be adjusted to the magnetic circuitry by programming the non-volatile memory.
This sensor is defined as ASIL B ready SEooC (safety element out of context) according to ISO 26262. It has a very low angular error of ±1.0 degrees at 30 mT amplitude with an end-of-shaft and off-axis 360 degrees angular measurement.
The sensor’s operating temperature range of -40 to +160 degrees C makes it suitable for automotive applications.
