MLX90425 / Triaxis® mainstream 360 rotary SFI position sensor (analog/PWM)
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.
Key features MLX90425
- 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
- Robustness against stray magnetic field up to 5 mT (or 4 kA/m) as per ISO 11452-8
- Packages, RoHS compliant
- SOIC-8 (DC) single die
- TSSOP-16 (GO) stacked dual die (redundancy)
- SMP-3 (VE), single die PCB-less solution
- SMP-4 (VD), stacked dual die PCB-less solution (redundancy)
- AEC-Q100 qualified (Grade-0)
- Programmable with the PTC-04 and the PTC-04-DB-HALL06 daughterboard
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.
MLX90425 Application Examples
- Pedal Position Sensor
- Throttle Position Sensor
- Ride Height Position Sensor
- Transmission Position Sensor
- Steering Wheel Position Sensor
- Non-Contacting Potentiometer
