Triaxis® mainstream 360 rotary SFI position sensor (analog/PWM)
MLX90425 Melexis
The MLX90425 is a magnetic position sensor suited for demanding but cost-conscious automotive applications. It offers up to 5 mT stray field immunity and supports 360° rotary motion of the magnet, with analog or PWM output.
Top features
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Supported output modes: analog (ratiometric) or PWM (Pulse Width Modulation)
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ISO 26262 ASIL B SEooC (Safety Element out of Context)
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Programmable measurement range
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Programmable linear transfer characteristic with up to 17 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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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
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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
Product description
The MLX90425 is a magnetic position sensor designed for use in cost-sensitive automotive applications including powertrain actuators, pedal positioning, fuel level gauges and transmission systems, though also suitable for industrial implementations. 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 MLX90425 is pin-to-pin compatible with the previous generations of Triaxis® position sensor ICs
The MLX90425 is a monolithic magnetic position sensor 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 MLX90425 is sensitive to the differential magnetic field in the Z-axis. This allows the MLX90425 with the correct magnetic circuit to decode the absolute position of a rotating on-axis magnet above or below the sensor (e.g. rotary position from 0 to 360 Degrees). It enables the design of non-contacting position sensors that are frequently required for both automotive and industrial applications.
The MLX90425 offers up to 5 mT stray field immunity and supports 360° rotary motion with analog or pulse width modulated (PWM) output.
Programming the sensor, after assembly into the application, increases the accuracy of the system thanks to the multi-point programmable linearization function.
The MLX90425 is compatible with the PTC-04 (DB-HALL06) for mass-production programming.
Application Examples
- Steering Wheel Position Sensor
- Throttle Position Sensor
- Ride Height Position Sensor
- Float-Level Sensor
- Non-Contacting Potentiometer
Features and benefits
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Supported output modes: analog (ratiometric) or PWM (Pulse Width Modulation)
-
ISO 26262 ASIL B SEooC (Safety Element out of Context)
-
Programmable measurement range
-
Programmable linear transfer characteristic with up to 17 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
-
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
-
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.
