Triaxis® mainstream linear SFI position sensor (analog/PWM/SENT)
MLX90423 Melexis
The MLX90423 is a magnetic position sensor suited for demanding but cost-conscious automotive applications. It offers robustness against stray field and supports long linear motion, with analog, PWM or SENT output.
Top features
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Multiple output modes supported
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Analog (ratiometric)
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PWM (Pulse Width Modulation)
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SENT output (SAE J2716 APR2016)
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ISO 26262 SEooC (Safety Element out of Context)
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ASIL C for SENT and PWM
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ASIL B for analog
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Programmable measurement range
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Programmable linear transfer characteristic (12 to 16 multi-points)
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Operating temperature from -40°C to 160°C
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Triaxis® Hall technology
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On chip signal processing for robust absolute position sensing
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Packages, RoHS compliant
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SOIC-8 (DC), single die
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TSSOP-16 (GO) dual die
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SMP-3 (VE), single die PCB-less solution
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Robustness against stray magnetic field up to 5 mT (or 4 kA/m) as per ISO 11452-8. Stray field immune angle sensing up to 360°
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AEC-Q100 qualified (Grade-0)
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Programmable with the PTC-04 and the PTC-04-DB-HALL06 daughterboard
Triaxis® mainstream linear SFI position sensor (analog/PWM/SENT) - MLX90423
Product description
The MLX90423 is a magnetic position sensor suited for demanding but cost-conscious automotive applications. The device blends high accuracy for long strokes (up to 30mm), stray field immunity (SFI) and ISO26262 (supports up to ASIL D system integration). This solution is ideal for automotive ADAS applications with space constraints such as braking systems (brake rod).
MLX9042x devices have superior capabilities in terms of functional safety, Absolute Maximum Ratings (AMR) and electromagnetic compliance (EMC) characteristics. They also support operating temperature up to 160 °C
The MLX90423 is pin-to-pin compatible with the previous generations of Triaxis® position sensor ICs
The MLX90423 is a monolithic magnetic position processor IC. It consists of a Triaxis® Hall magnetic front end, an analog to digital signal conditioner, a DSP for advanced signal processing and a programmable output stage driver.
The MLX90423 is sensitive to the three components of the magnetic flux density applied to the ICs (i.e. Bx, By and Bz). This allows the MLX90423 with the correct magnetic circuit to decode the absolute position of any moving magnet. It enables the design of non-contacting position sensors that are frequently required for both automotive and industrial applications.
The MLX90423 provides ratiometric analog, PWM output or SENT frames encoded according to a Secure Sensor format. The circuit delivers enhanced serial messages providing error codes, and user-defined values.
Programming the sensor, after assembly into the application, increases the accuracy of the system thanks to the multi-point programmable linearization function.
The MLX90423 is compatible with the PTC-04 (DB-HALL06) for mass-production programming.
Application Examples
Absolute Rotary Position Sensor
- Pedal Position Sensor
- Throttle Position Sensor
- Ride Height Position Sensor
Absolute Linear Position Sensor
- Steering Wheel Position Sensor
- Float-Level Sensor
- Non-Contacting Potentiometer
Features and benefits
-
Multiple output modes supported
-
Analog (ratiometric)
-
PWM (Pulse Width Modulation)
-
SENT output (SAE J2716 APR2016)
-
-
ISO 26262 SEooC (Safety Element out of Context)
-
ASIL C for SENT and PWM
-
ASIL B for analog
-
-
Programmable measurement range
-
Programmable linear transfer characteristic (12 to 16 multi-points)
-
Operating temperature from -40°C to 160°C
-
Triaxis® Hall technology
-
On chip signal processing for robust absolute position sensing
-
Packages, RoHS compliant
-
SOIC-8 (DC), single die
-
TSSOP-16 (GO) dual die
-
SMP-3 (VE), single die PCB-less solution
-
-
Robustness against stray magnetic field up to 5 mT (or 4 kA/m) as per ISO 11452-8. Stray field immune angle sensing up to 360°
-
AEC-Q100 qualified (Grade-0)
-
Programmable with the PTC-04 and the PTC-04-DB-HALL06 daughterboard
Documents and tools
Datasheet(s)
Product flyer(s)
Selection guide(s)
IC handling and assembly
Magnet suppliers
Related tech talks
Videos
Melexis redefines the market with 3D magnetic position sensors (MLX9042x)
Melexis expands its portfolio of 3D magnetic position sensing solutions with the introduction of the MLX9042x series. These sensors are intended for cost-conscious automotive customers who need to measure absolute position accurately and safely in harsh and noisy environments over an extended temperature range.
Triaxis®: Unique position sensing solution
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.
Melexis universal programmer for magnetic sensors (PTC-04)
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.
Back-end calibration of magnetic position sensors
This video explains the concept of the back-end calibration: a feature of our magnetic position sensors that allows you to compensate for non-linearity error in your application. Different methods of calibration and examples are presented. This will help you understand how to use the calibration and why you may need it.
