SmartElex MLX90393 Triple Axis Magnetometer High-Precision Magnetic Field Sensor

Overview

The module is based on the MLX90393 3-axis magnetometer IC, a high-resolution digital magnetic field sensor.

• Measures magnetic field along:

  • X-axis

  • Y-axis

  • Z-axis

   

• Provides precise vector magnetic field data

• Suitable for:

  • Compass applications

  • Position sensing

  • Magnetic field analysis

   

It is a 3D magnetic sensing solution with high sensitivity and flexibility.

Working Principle

Hall / Magneto-Resistive Sensing

• Uses Triaxis Hall-based sensing technology

• Detects magnetic field by measuring changes in internal sensor properties due to magnetic flux

  • Magnetic field interacts with sensing elements

  • Generates small electrical signal

  • Internal amplifier boosts signal

  • ADC converts it into digital output

  Outputs represent magnetic field strength in each axis.

  Measurement Characteristics

  Magnetic Field Range (Selectable)

  • 5 mT

  • 16 mT

  • 50 mT

  Wide range allows detection of:

  • Weak Earth's magnetic field

  • Strong nearby magnets

  Resolution

  • Up to 16-bit digital resolution

  • High sensitivity:

    • Detects very small field changes

  Output Data

  • 3-axis magnetic field values:

    • X, Y, Z components

  Electrical Characteristics

  V

• Low power consumption

• Designed for embedded systems

Communication Interface

• I2C interface

• SPI interface

Flexible digital communication with microcontrollers.

Internal Features

Programmable Gain

• Adjust sensitivity based on application

Adjustable Resolution

• Trade-off between:

  • Speed

  • Precision

   

Temperature Compensation

• Reduces drift due to temperature changes

Multi-Axis Measurement

• Simultaneous measurement of X, Y, Z fields

Low Noise Design

• Ensures stable and accurate readings

Operating Behavior

Magnetic Field Detection

• Dynamic changes

Vector Measurement

• Provides direction + magnitude of magnetic field

Orientation Detection

• Can be used to determine:

  • Heading (compass direction)

  • Rotation relative to Earth

   

Environmental Characteristics

• Stable across wide temperature ranges

• Maintains accuracy with internal compensation

Limitations

• Sensitive to:

  • External magnetic interference

  • Nearby electronics

   

• Requires calibration for:

  • Accurate compass readings

   

• Cannot measure:

  • Distance directly (only field strength)

   

Typical Pin Configuration

• VCC Power supply

• SDA / MOSI Data

• SCL / SCK Clock

• CS Chip select (SPI mode)

Functional Role

The module acts as a:

• Magnetic field sensor

• Digital compass sensor

• Position/orientation detector

• Magnetic interaction measurement device

Summary

The SmartElex MLX90393 Magnetometer Breakout is a high-precision 3-axis magnetic sensing module that:

• Measures magnetic field in X, Y, Z axes

• Uses Hall-based sensing technology

• Provides high-resolution digital output

• Supports I2C and SPI communication

• Offers prng>

• Is optimized for precision magnetic field and orientation sensing