Melexis MLX90394 Micropower Triaxis® 3D Magnetometer

Melexis MLX90394 Micropower Triaxis® 3D Magnetometer is a 3-axis device suitable for many position sensor applications using Triaxis Hall Technology. The device, specially designed for micropower applications, measures magnetic fields along the X, Y, and Z axes. The measurements and the IC temperature are converted into 16-bit words and then transferred over an I²C communication channel. Measurements can be made upon request or continuously with selectable refresh rates. MLX90394 offers superb noise performance in a small 6-pin package with low current consumption for multiple settings and configurations.

MLX90394’s wake-up modes allow users to put the entire system in deep sleep until the IC detects a magnetic field change on the selected axes either versus an initial measurement (Static Delta), previous measurement (Dynamic Delta), or a predefined absolute threshold (Absolute). This way, busy/slowly drifting magnetic fields can be registered while the device automatically toggles between active and sleep mode.

By clever wiring, the Melexis MLX90394 provides synchronization options through an interrupt pin and two I²C addresses (per device). Four preprogrammed MLX90394 magnetometers can be placed on a single I²C bus.

Features

16-bit digital output for magnetic and temperature data
Individually selectable magnetic axes
3x wake-up on change/interrupt modes
Data ready output for μC synchronization
Built-in chip temperature compensation
Runtime selectable modes (on-the-fly)
3x user selectable configurations (low current, low noise, high range)
2x selectable I²C slave addresses in 1x device
Integrated configurable digital filter
Average consumption of 3μA for X or Y and 4.3μA for Z at 10Hz in single measurement mode