Digital magnetometer MLX90391

3-axis

Product overview
The MLX90391 is a low-power 3D digital magnetometer in TSOT23-6L designed for micropower, cost-sensitive industrial applications. It measures magnetic fields on X, Y and Z axes using vertical and horizontal Hall-effect integration and provides 16-bit magnetic and IC temperature data over an I2C interface. Four user-selectable magnetic ranges (±65 mT, ±130 mT, ±260 mT, ±520 mT) allow use for either high-resolution position sensing or robust external-magnet anti-tamper protection up to ~500 mT. The device supports Wake-up on Change (Static Delta and Dynamic Delta), external synchronization via trigger pin or I2C, and two pin-selectable I2C addresses per device, enabling multiple pre-programmed MLX90391 units on a single I2C bus. Operating voltage is 1.7 V to 3.6 V and ambient temperature range is -40 °C to 125 °C. Standard package: TSOT23-6L.

Top features

• Selectable magnetic ranges: ±65 mT, ±130 mT, ±260 mT, ±520 mT
• Wake-up on Change (WOC) logic: Static Delta and Dynamic Delta interrupt modes
• Ultra-low power-down current: ~5 nA
• 16-bit digital output for magnetic and temperature data
• Data Ready output for MCU synchronization
• On-chip temperature compensation
• Runtime-selectable operating modes (on-the-fly)
• Configurable integrated digital filter
• Individually selectable magnetic axes
• I2C compatible (0.1 MHz, 0.4 MHz & 1.0 MHz)
• External synchronized measurement via I2C or trigger pin
• Two pin-selectable I2C slave addresses; two device versions available
• Wide supply voltage: 1.7 V to 3.6 V
• Ambient temperature range: -40 °C to 125 °C
• Package: TSOT23-6L (SE); RoHS and halogen-free compliant

Application examples

• Anti-tampering systems: smart utility meters, doors and windows
• White goods: smart knobs and liquid-level sensing
• Battery-powered controls: hairdryer and drill triggers
• Smart home: HMI thermostats and electronic locks
• Wearables: smartwatch digital crown and bezel sensing
• Industrial: linear and pneumatic actuators
• Gaming: joysticks, D-pads and trigger buttons
• E-bikes: fork and gear position sensing
• PC peripherals: mouse roller position sensing

Caractéristiques / spécifications techniques

• Model: MLX90391
• Sensor type: 3-axis Hall-effect (vertical & horizontal Hall integration)
• Magnetic ranges: ±65 mT, ±130 mT, ±260 mT, ±520 mT (user-selectable)
• Resolution / output: 16-bit digital output for magnetic data and IC temperature
• Interfaces: I2C (0.1 MHz, 0.4 MHz, 1.0 MHz); external trigger pin for sync; two selectable I2C slave addresses per device
• Wake-up / interrupt: Wake-up on Change (Static Delta / Dynamic Delta) and interrupt modes
• Power modes: Ultra-low power-down ~5 nA; micropower runtime-selectable modes
• Filtering: Integrated configurable digital filter
• Temperature compensation: On-chip compensation for IC temperature
• Supply voltage: 1.7 V to 3.6 V
• Operating ambient temperature: -40 °C to 125 °C
• Package: TSOT23-6L (SE); RoHS and halogen-free compliant
• Bus capability: Two I2C addresses per device and two device versions allow up to four pre-programmed devices on a single I2C bus
• Typical use cases: position sensing, anti-tamper protection, contactless HMI, battery-powered controls