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MLX90324 General Description

The MLX90324 is a CMOS Triaxis Hall sensor that gives the angular position of a magnetic field parallel to the IC surface. It is designed for contactless rotary position sensors: the MLX90324 detects the absolute angular position of a small magnet that is positioned and rotates above the device surface.

An Integrated Magneto-Concentrator (IMC) concentrates the applied magnetic flux density parallel to the IC surface. At the boundaries of the IMC structure, an orthogonal component proportional to the applied flux density can be measured by two pairs of conventional planar Hall plates located orthogonally under the IMC and for each of the two directions parallel with the IC surface (X and Y). The first part of the sensor encodes a mechanical angle into two sinusoidal signals with 90° phase shift(sine and cosine). The two signals (Vx & Vy) proportional to the magnetic field are amplified, sampled and converted in the digital domain. The digital representations of the two signals are then used to calculate the angle through an Arctangent function applied on the ratio Vy/Vx. The Arctangent function is implemented by a look-up table.

The current angle value represented by a digital value can then be reported at the output node in the following ways:
(i) Analog (thanks to a D/A converter and analog output buffer with broken-tracks diagnostic capability)
(ii) Digital - PWM (Pulse Width Modulation)
(iii) Digital - SENT (Single Edge Nibble Transmission - SAE-J2716).

The output transfer characteristic is fully programmable (e.g. offset, gain, clamping levels). Two linearization options are available:
(i) 3 Arbitrary Points + 4 Slopes
(ii) Piece-Wise-Linear (PWL) - 16 Segments

The MLX90324 can sense a rotary position without contact and over a wide range up to 360º (complete revolution).

The MLX90324 is similar to the MLX90316 in many ways but it is targeted for “Under-the-Hood” applications and the associated harsh hi-temperature environment. Amongst others, the SENT feature and the excellent performances over the entire temperature range and lifetime confirm this devotion.

MLX90324 Features and Benefits

Absolute Rotary Position Sensor IC
Triaxis Hall Technology — Non Contact
Full 360 Degrees or limited Angle Applications
-40°C — +150°C Ambient Temperature Range (qualified up to +160°C)
12-bit Resolution on 360 Degrees of Rotation
10-bit Angular Accuracy
Selectable Output Mode:
-> Analog (Ratiometric)
-> PWM
-> SENT Protocol (SAE-J2716 - Apr.07)
Programmable Linear Transfer Characteristic
-> 3 Arbitrary Points & 4 Slopes
-> Piece-Wise-Linear (PWL) — 16 Segments
Broken-Track Diagnostic (Open-VDD, Open-VSS)
Simple & Robust Magnetic Design
48-bit ID Number
Single Die - SO8 Package RoHS Compliant
Dual Die (Full Redundant) — TSSOP16 Package RoHS Compliant
Lead free component, suitable for lead free soldering profile 260°C

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The Sky's The Limit

Melexis Products

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Download Melexis
Annual Report 2011
English | Nederlands

MLX90324 Under-the-Hood Rotary Position sensor, feat. SENT protocol

Download MLX90324 Datasheet (PDF)

MLX90324 General Description

MLX90324 Features and Benefits

MLX90324 Related Products

MLX90324 Applications

MLX90324 Documentation

MLX90324 Tools

MLX90324 Environmental Information

MLX90324 In The Press

Related Melexis News

MLX90324 Frequently asked Questions

Buy MLX90324

Melexis Products

Melexis Members

Download Melexis Annual Report 2011 English | Nederlands

MLX90324 Under-the-Hood Rotary Position sensor, feat. SENT protocol

Download MLX90324 Datasheet (PDF)

MLX90324 General Description

MLX90324 Features and Benefits

MLX90324 Related Products

MLX90324 Applications

MLX90324 Documentation

MLX90324 Tools

MLX90324 Environmental Information

MLX90324 In The Press

Related Melexis News

MLX90324 Frequently asked Questions

Buy MLX90324

Download Melexis
Annual Report 2011
English | Nederlands