Melexis Reveals Compact, Low-Voltage 3D Magnetometer MLX90392 for Consumer Applications
6 May 2021 - Melexis, a global microelectronics engineering company, is targeting white goods, consumer electronics, and smart-metering applications with the MLX90392 three-axis magnetic field sensor, which can operate from a 1.8V power rail shared with other components such as logic devices.
Requiring no dedicated LDO or regulator, the competitively priced MLX90392 simplifies design, trims bill-of-materials costs, and saves PCB space. Measuring just 2mm×2.5mm×0.4mm, the sensor features a UTDFN-8 ultra-thin no-lead 8-pin package to help designers tackle space-constrained applications. In addition, a 1.5µA power-down mode helps save energy and thus maximize runtime in battery-powered applications.
With an integrated thermal sensor, and featuring an I2C communication protocol, the MLX90392 places 16-bit position measurements in X, Y, Z axes, and temperature, onto the I2C bus operating at up to 1MHz. Two variants are available, allowing a choice of ±50mT and ±5mT full-scale range, leveraging Melexis' patented Triaxis® Hall technology to deliver low noise and best-in-class accuracy.
The ±50mT range is optimal for position measurement in HMI applications, door-closure detection in white goods and access-control systems, anti-tamper for smart meters, and contactless joysticks that save the power dissipated by the traditional position sensing with potentiometers. For position sensing which requires a small magnetic range, and for precise position measurement where noise is a critical design parameter, the ±5mT variant has a sensitivity of 0.15µT/LSB and typical RMS noise down to 0.3µT.
Both devices support single-measurement and continuous-measurement modes, giving outstanding design flexibility, while self-test status, data-ready, and magnetic sensor-overflow indication provide comprehensive diagnostics.
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