Gen III Triaxis® rotary and linear position sensor IC (analog or PWM output)

MLX90371

The MLX90371 is a monolithic sensor sensitive to the three components of the flux density applied to the IC. This allows the MLX90371 with the correct magnetic circuit to decode the absolute position of any magnet moving in its vicinity.

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Top features

  • Triaxis® Hall technology

  • On-chip signal processing for robust absolute position sensing

  • ISO26262 ASIL-B Safety Element out-of-Context (SEooC)

  • Programmable measurement range

  • Programmable linear transfer characteristic (multi-points 4 or 8 points or piece-wise-linear 16 or 32 segments)

  • Selectable output mode: analog (ratiometric) and PWM

  • 12-bit angular resolution

  • 10-bit thermal accuracy

  • 48-bit ID number option

  • Robustness against stray field

  • Programmable with the PTC-04 and the PTC04-DB-HALL06 daughterboard
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Gen III Triaxis® rotary and linear position sensor IC (analog or PWM output) - MLX90371

Product description

The MLX90371 is a third generation Triaxis® position sensor IC. Thanks to an integrated magnetic concentrator (IMC) on its surface, the monolithic device senses, in a contactless fashion, the three spatial components (i.e. Bx, By and Bz) of the applied magnetic field allowing for the determination of rotary and linear movement.

Triaxis - Melexis

Learn more about the Triaxis® technology.

The MLX90371 distinguishes itself by offering, for the first time in a Triaxis® sensor IC, a stray field immune mode for rotary and linear motion sensing. This mode eliminates or drastically reduces the effects that undesired magnetic fields, from another magnet or from current carrying conductors, can have on the system. For rotary motion a range of 180 degrees is obtained with a four-pole magnet while linear motion up to 25mm or more can be obtained with a two-pole magnet.

The MLX90371 is also backwards compatible with the previous Triaxis® generations allowing for the traditional two-pole magnet with 360-degree rotational measurement capability to be used or greater than 25mm linear motion in the same device but without immunity to stray fields.

The MLX90371 is offered as an ASIL-B SEooC (Safety Element out of Context - ISO 26262) component. Contact Melexis to obtain a copy of the MLX90371 safety manual which details the relevant system integration requirements. For applications requiring redundant sensing the MLX90371 is also available in a dual die (fully redundant) TSSOP-16 package.

ASIL Ready - Melexis

The output transfer characteristic is fully programmable with up to 32 calibration points to match any specific requirement through end-of-line programming at module assembly. The Melexis programming unit PTC-04 communicates and calibrates the device exclusively through the connector terminals (Vdd-Vss-Out).

The MLX90371 targets and is used in a myriad of non-contacting rotary position sensor applications which are frequently seen in automotive and industrial systems. The IC is available in single and dual redundant implementations to cost-effectively address the full range of applications, including safety critical sensing requirements.

Features and benefits

  • Triaxis® Hall technology

  • On-chip signal processing for robust absolute position sensing

  • ISO26262 ASIL-B Safety Element out-of-Context (SEooC)

  • Programmable measurement range

  • Programmable linear transfer characteristic (multi-points 4 or 8 points or piece-wise-linear 16 or 32 segments)

  • Selectable output mode: analog (ratiometric) and PWM

  • 12-bit angular resolution

  • 10-bit thermal accuracy

  • 48-bit ID number option

  • Robustness against stray field

  • Programmable with the PTC-04 and the PTC04-DB-HALL06 daughterboard

Videos

Next gen Triaxis® position sensor ICs

Product

The next-generation monolithic magnetic sensor family, consisting of the MLX90371 and MLX90372, provides robust absolute position sensing for automotive applications including powertrain actuators, pedals, and gear shifters.

Triaxis® position sensor with PSI5 output

Product

The MLX90373, part of the Triaxis® rotary and linear Hall-effect position sensor family, is the first Triaxis® angle sensor to offer support for the PSI5 interface. The Peripheral Sensor Interface 5 (PSI5) is an open standard based on the highly responsive technology used in millions of airbag safety systems.

Triaxis® position sensor with dual output

Product

This third generation of Triaxis® Hall sensor is the first to offer multiple outputs from a monolithic device. With dual outputs for the sensed motion, our MLX90374 can remove the need for a second position sensor in a range of applications.

Melexis universal programmer for magnetic sensors (PTC-04)

How to

In this video, Albert-Jan Knevels (Applications Engineer), gives a detailed introduction to the PTC-04: Melexis universal programmer tool for magnetic sensors. He shows how to install the relevant hardware and gives a demonstration on how to work with the software.

Triaxis®: Unique position sensing solution

Product

Triaxis® is an innovative magnetic sensor technology capable of very precise 3 axis magnetic field measurement from a single sensor. Endless linear, angular and 3D applications e.g. for powertrain (conventional, hybrid & electric), body, comfort & lighting, chassis & safety can be developed.

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