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The MLX90316 is a Triaxis® rotational position sensor IC that provides the angular position of a small dipole magnet (shaft-end magnet) rotating above the device surface.

This monolithic device senses the horizontal component of the applied magnetic flux density in a non-contact manner by virtue of the magnetisation collection point (IMC) on its surface.

The unique sensing principle applied by the rotary position sensor ensures a high degree of robustness of the angular position within mechanical (air gap, off-axis) tolerances.

The rotation of this horizontal component is sensed over a wide range (up to 360º - full revolution) and processed by the on-chip DSP (Digital Signal Processing), which ultimately reports the absolute angular position of the magnet as a proportional analogue output, a PWM (Pulse Width Modulation) signal or 14-bit data accessible via a 3-pin SPI (Serial Interface) channel.

The output transmission characteristics are fully programmable (e.g. offset, gain, clamp level, linearity, thermal drift, filtering, range...) The output characteristics are fully programmable (e.g. offset, gain, clamp level, linearity, thermal drift, filtering, range,...) and can thus be calibrated at the end of the line to meet any specified requirement. The Melexis programming unit PTC-04 communicates with and calibrates the devices exclusively via the connector terminals (Vdd-Vss-Out).

The MLX90316 is targeted for a large number of non-contact rotary position sensor applications common in automotive and industrial systems.

The device is available in both single and dual redundant implementations, enabling a wide range of applications (including safety critical sensing requirements) to be met in a cost effective manner.

Features and Benefits

Absolute rotary position sensor IC

Simple and robust magnetic design

Triaxis® technology

Ambient temperature range from -40°C to +150°C

Programmable angular range of up to 360 degrees

Programmable linear transmission characteristics

Selectable output modes: analogue (proportional), PWM and serial protocol (SPI)

12-bit angular resolution over a 360 degree range

I10-bit angular accuracy

40-bit ID numbering

Break trace diagnostics (Open-Vdd, Open-Vss)

On-chip diagnostics

Overvoltage protection

Low voltage detection

AEC-Q100 compliant - Class 0

Single chip - SOIC-8 package - lead free and RoHS compliant

Dual-chip (fully redundant) - TSSOP-16 package - lead free and RoHS compliant

Applications

Absolute rotary position sensors

Steering wheel position sensors

Pedal position sensors

Motor shaft position sensors

Throttle position sensors

Float level sensors

Travel height position sensors

Non-contact potentiometers

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