Melexis Launches High Performance Linear Travel Magnetic Position Sensor Chip

    MLX90423 adopts Melexis Triaxis ® Hall technology can achieve linear displacement (absolute linearity) of up to 30mm when it is necessary to suppress stray magnetic field interference. This accuracy can usually only be achieved through advanced induction technology. According to the ISO 26262 standard, MLX90423 is an ASIL C-grade single chip, but also offers a dual chip option that supports ASIL D system integration. In addition, this device inherits the superior performance of other members of the series in terms of absolute maximum rating and electromagnetic compatibility (EMC) characteristics, and can also achieve higher accuracy throughout the entire operating temperature range.

    MLX90423 is a highly integrated magnetic position sensor chip that includes a Triaxis ® Hall magnetic sensing front-end, an analog-to-digital signal conditioner, a DSP for advanced signal processing, and a programmable output stage driver. By sensing the three components of magnetic induction intensity applied to the chip (Bx, By, and Bz), MLX90423 can decode the absolute position of a linearly moving magnet. This feature enables engineers to use it to control applications such as brake lever travel, pedal position, or parking lock actuator.

    The MLX90423 can provide proportional analog output, PWM output, or SENT output encoded according to the safety sensor format. It meets the ISO 11452-8 standard and can resist stray magnetic field interference up to 5mT (4kA/m).

    Like other sensor chips in the MLX9042x series, the design purpose of the MLX90423 is to ensure a successful EMC test, thereby maintaining an efficient design process and controlling costs. It has a higher absolute maximum rating (AMR) and can provide various protections, including reverse polarity, to reduce quality accidents caused by electrical overstress and meet various OEM requirements.

    The operating temperature of the Melexis MLX9042x device can reach up to 160 ℃.

    All MLX9042x devices have passed AEC-Q100 certification. Users can choose SMD packaging or use SMP-3 PCB free packaging (where the sensor chip and EMC capacitor are integrated in the same mold).

    MLX90423 is a futuristic product suitable for ADAS applications such as braking. Compared to other linear position sensing solutions, this device has extremely high cost-effectiveness, "said Karen Stinkens, global marketing manager for Melexis position sensor chips.