Gen III Triaxis® rotary and linear position sensor with dual output

MLX90374

The MLX90374 is a third generation Triaxis® position sensor. Thanks to the Triaxis® technology the MLX90374 enables measurement of rotary or linear motion of a magnet. With the dual-PWM output or SENT output the MLX90374 enables redundant transmission of position without the overhead of a second sensing element.

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Top Features

  • Absolute linear and rotary position sensor

  • Dual output capability per die

  • On-chip diagnostics – ASIL-C (SEooC)

  • Stray field immunity capability

  • -40degC - +160degC ambient temperature range

  • Simple and robust magnetic design

  • Programmable linearization algorithm: arbitrary points (8 points) or piece-wise-linear (32 points)

  • Programmable measurement range

  • Selectable output mode: SENT (J2716 APR2016 SENT), and PWM

  • Programmable SENT tick time from 1.5µs to 6µs

  • 12-bit angular resolution

  • 10-bit thermal accuracy

  • PCB-less package (DMP-4) available for applications without a PCB

  • Gateway (input) mode for external measurements

  • AEC-Q100 qualified – Grade 0
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Gen III Triaxis® rotary and linear position sensor with dual output - MLX90374

Product description

The MLX90374 is a third generation Triaxis® position sensor. 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 or linear movement.

The MLX90374 distinguishes itself by offering, for the first time in a Triaxis® sensor, 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.

Triaxis - Melexis

The MLX90374 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 MLX90374 is offered as an ASIL-C SEooC (Safety Element out of Context - ISO 26262) component. Contact Melexis to obtain a copy of the MLX90374 safety manual which details the relevant system integration requirements.

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 MLX90374 also brings the ability to read an external input. This could be a signal from a temperature sensor, pressure sensor, or another position sensor. The value is measured, linearized (optional), and then encoded for transmission on the SENT bus alongside the angular measurement value allowing for reduction of wire count and better integration of sensors.

The MLX90374 targets and is used in a myriad of non-contacting rotary position sensor applications which are frequently seen in automotive and industrial systems such as transmission range sensors, integral mode switches, and brake travel pedal sensors. The device is available in surface mount and PCB-less packages to cost-effectively address the full range of applications, including safety critical sensing requirements.

Features and benefits

  • Absolute linear and rotary position sensor

  • Dual output capability per die

  • On-chip diagnostics – ASIL-C (SEooC)

  • Stray field immunity capability

  • -40degC - +160degC ambient temperature range

  • Simple and robust magnetic design

  • Programmable linearization algorithm: arbitrary points (8 points) or piece-wise-linear (32 points)

  • Programmable measurement range

  • Selectable output mode: SENT (J2716 APR2016 SENT), and PWM

  • Programmable SENT tick time from 1.5µs to 6µs

  • 12-bit angular resolution

  • 10-bit thermal accuracy

  • PCB-less package (DMP-4) available for applications without a PCB

  • Gateway (input) mode for external measurements

  • AEC-Q100 qualified – Grade 0
Used in these

Industries

  • Automotive - Body, HVAC, Comfort & Lighting
  • Automotive - Chassis & Safety
  • Automotive - Hybrid & Electric Powertrain
  • Automotive - Powertrain
  • Automotive - Transmission
  • Industrial & Robotics
  • Non-Automotive Transportation

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