Melexis MLX90395 position sensor - compact 3D sensing for harsh automotive use

Melexis MLX90395 3D position sensor brings compact, PCB-free magnetic sensing to demanding automotive environments with up to 23-bit resolution. Anyone holding Melexis stock (Euronext: MELE, ISIN BE0165385973) should know this product.

By Daniel Foster, ad hoc news Accessories & Components Desk. Reviewed July 01, 2026, 10:59 PM ET. Details in the imprint.

The Melexis MLX90395 3D position sensor is the kind of chip you only notice when it fails. Picture a steering column module on a test bench in Detroit, the faint click of the wheel as an engineer nudges it and watches the angle data from the MLX90395 stream smoothly across the oscilloscope.

3D sensing in a tiny package

The MLX90395 is a three-dimensional Hall-effect position sensor that measures magnetic field components to infer position in X, Y, and Z axes. It is offered in small QFN and DCB packages, designed to sit close to a magnet and deliver absolute position data without mechanical contact. The sensor integrates an analog front end, ADC, and DSP, providing up to 23-bit resolution magnetic measurements and 16-bit position outputs, depending on configuration.

Melexis positions this device for automotive and industrial applications, where non-contact sensing reduces wear and increases reliability in harsh environments. The MLX90395 is qualified to AEC-Q100 Grade 1 for most variants, meaning it can operate from -40 °C up to 125 °C, addressing underhood or interior modules in vehicles. A separate industrial grade variant extends functional options for automation and robotics.

Automotive-grade robustness

According to Melexis product materials, the MLX90395 requires no printed circuit board in some implementations, since the DCB package allows direct leadframe connection and potting into modules. This is aimed at Tier 1 suppliers designing compact position sensors for steering, pedals, or gear shifters where space and reliability are critical. The chip supports supply voltages typically around 3.3 V to 5 V and includes diagnostic features like temperature measurement and programmable alarms for fault detection.

On the sensing side, the MLX90395 supports multiple magnetic modes, including different ranges and sensitivity settings, enabling designers to trade off range versus precision. Melexis documentation describes programmable measurement cycles, allowing time multiplexing of X, Y, Z components and temperature to balance speed and power. Interfaces offered include SPI and I2C, making integration with automotive microcontrollers straightforward.

How designers use MLX90395

Engineers like Melexis senior product manager Bruno Boury talk about these sensors in very practical terms: a magnet on a rotating shaft, a small gap, and a chip that converts magnetic flux into a stable angle. In steering angle measurement, for instance, the MLX90395 can be mounted on a small PCB or directly in a molded housing, paired with a diametrically magnetized ring on the steering column. The sensor then reports absolute angle over SPI or I2C, with calibration curves stored in its internal EEPROM.

For linear position use, such as brake pedal or throttle position, designers arrange a magnet on the moving element and the MLX90395 on the fixed module. As the magnet shifts relative to the Hall structure, the sensor sees changes in field components and, via its internal algorithm, converts them into a position value. Melexis provides application notes and example code to help OEMs tune these systems, including recommendations on magnet selection and placement.

US relevance and supply chain

While Melexis is headquartered in Belgium, its magnetic sensors including the MLX90395 are widely used by Tier 1 suppliers that serve US automakers. That means a driver turning the wheel of a 2025 model-year SUV built in Ohio may indirectly rely on angle data from a Melexis sensor buried deep in the steering module. Melexis sells these chips globally through direct sales and distributors, not as retail components, so most US exposure is via automotive and industrial design-ins rather than hobby markets.

For US retail investors, the MLX90395 matters less as a standalone product and more as part of Melexis' broader magnetic sensing segment. Hall-effect sensors are a core competency for the company, and volumes scale with vehicle production, automation projects, and electrification trends. The company highlights magnetic position sensing as a key pillar in its technology roadmap, alongside current sensors and temperature ICs.

Technical highlights and limitations

Melexis specifies the MLX90395 with low offset drift over temperature, a crucial metric for keeping angle error small across environmental changes. Noise performance and resolution are balanced so that engineers can achieve sub-degree angle precision in well-designed systems, though exact accuracy depends heavily on magnet selection and mechanical layout. The chip supports measurement frequencies up to several kilohertz, allowing real-time control applications like electric power steering to maintain stable feedback.

There are limits: strong external magnetic fields, poor magnet alignment, or mechanical wobble can degrade performance and introduce error. Melexis documentation warns that careful mechanical design is essential and suggests using finite-element simulations or empirical testing to validate the magnetic arrangement. Unlike simple on-off Hall switches, 3D sensors such as the MLX90395 demand more upfront engineering work, but offer richer data and flexibility once integrated.

Segment context and stock angle

Melexis is not a consumer brand in the US, but its semiconductor components have become part of the plumbing of modern vehicles and industrial systems. Magnetic position sensors like the MLX90395 sit alongside current sensors, LiDAR-related ICs, and temperature sensors across the portfolio, giving the company exposure to driver-assistance features, electrified powertrains, and factory automation. For investors watching Melexis stock (Euronext: MELE, ISIN BE0165385973), this product line adds to the recurring, design-in based revenue typical for automotive chip suppliers rather than serving as a headline-grabbing gadget.

Melexis MLX90395 at a glance

• Product: MLX90395 3D position sensor
• Manufacturer: Melexis NV
• Category: Accessories and components (magnetic position sensor IC)
• Launch: MLX90395 family introduced in the mid-2010s; variants and documentation updated over time
• MSRP / Price: Sold through B2B channels; pricing depends on volume and contract, typically in the low single-digit USD range per unit for automotive volumes
• Availability: Available globally via Melexis and authorized distributors, targeted at automotive and industrial OEMs rather than end consumers
• Target audience: Automotive and industrial design engineers, Tier 1 suppliers building steering, pedal, shifter, and actuator modules
• Standout / USP: Compact 3D Hall-effect sensing with automotive-grade robustness, enabling PCB-free integration and absolute position measurement across multiple axes

This article was AI-assisted and editorially reviewed. Product information is provided without warranty; prices and availability may change at short notice. Not investment advice and not a buy or sell recommendation. Securities trading carries risks up to total loss.