Position sensor suits vehicle safety systems


The Melexis MLX90427 magnetic position sensor is intended for applications requiring high automotive functional safety levels, such as steer-by-wire systems. It provides stray field immunity and EMC robustness, as well as SPI output. Additionally, the device transitions seamlessly between four operating modes, including rotary, joystick, rotary with stray field immunity, and raw data.

At the heart of the MLX90427 is a Triaxis Hall magnetic sensing element that is sensitive to three components of flux density (BX, BY, and BZ) applied to the IC. This allows the sensor to detect movement of any magnet in its vicinity. The part also integrates an ADC, DSP, and output stage driver for SPI signal output.

In addition to AEC-Q100 Grade 0 qualification, the MLX90427 is SEooC ASIL C ready in accordance with ISO 26262 and can be integrated into automotive safety-related systems up to ASIL D. To simplify system integration, the sensor is compatible with 3.3-V and 5-V designs and operates over a temperature range of -40°C to +160°C. Self-diagnostics are built in to ensure swift fault reporting.

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The MLX90427 position sensor comes in an 8-pin SOIC package. A fully redundant dual-die variant in a 16-pin TSSOP is due to launch in Q4 2024.

MLX90427 product page

Melexis

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