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Melexis Expanded Performance Limits with New Miniature 3D Magnetometer

Update time : 2023-12-18 11:54:02

Melexis, a global microelectronics engineering company, announced on Wednesday the launch of the Triaxis® Micropower Magnetometer MLX90394, a miniature Hall-effect based sensor that perfectly balances low noise, micro-current consumption and cost. It features instantly selectable modes and advanced configurability for excellent reusability and faster time-to-market. This contactless solution is suitable for rotary, linear and 3D joystick control in gaming and industrial peripherals.

The MLX90394 replaces traditional mechanical solutions, providing a simpler, flexible and highly reliable solution and overcoming problems inherent in traditional potentiometers such as potentiometer cursor surface contamination and packaging limitations. The magnetometer is versatile and can be deployed in linear, rotary, joystick and push-button operations, replacing a large number of existing components, thereby simplifying the supply chain and realizing high economies of scale. In addition, the product is highly flexible (allowing for future configuration changes) and features a non-contact design that allows for a longer operating life than potentiometers and contact switches.The MLX90394 also features an ultra-thin, compact design (2 x 1.5 x 0.4 mm), which contributes to a sleeker HMI.
The MLX90394's architecture offers several advantages over existing solutions on the market. The design measures and outputs each magnetic axis individually and features a built-in temperature sensor that provides additional digital signal processing (DSP) compensation through selectable temperature measurements. Data outputs for both temperature and position are 16-bit resolution, and the I2C interface pins support 0.1MHz, 0.4MHz and 1.0MHz modes. The product has two internal I2C addresses that can be selected by changing the electrical pin connections.
The product features Melexis' unique Triaxis® technology at its core, an innovation that helps provide low-noise (<9μT) standalone 3-axis measurements in micro-power operation. In 10Hz single measurement mode, the average current consumption for X- or Y-axis measurements is only 4 μA, and for Z-axis measurements it is only 5 μA, while with the microcontroller in deep sleep mode with very low consumption, the chip consumes <10 μA, helping to reduce system power consumption. The wake-up-on-change (WOC) feature allows quick resumption of operation via pulsed or latching hardware pin interrupts (XYZ).The WOC threshold can be configured for initial measurements (static incremental), for previous measurements (dynamic incremental), or for predefined measurements (absolute). As a result, it accurately transitions from power-down mode to active mode in high motion applications and slow drift motion applications.
The embedded design allows for easy integration and accurate tracking of rotating joystick motion and push/slide button applications. The product is available in two compact UTDFN-6 (LD) package designs that support different measurement ranges: ±5mT (0.15μT/LSB) and ±50mT (1.5μT/LSB). All of its models are RoHS-certified and suitable for operation in an ambient temperature range of -40°C to 105°C, with supply voltages ranging from 1.7V to 3.6V, making them ideal for most embedded and IoT electronics environments.
"The MLX90394 great value and excellent performance for a very wide range of applications. Whether engineers are developing computer peripherals, industrial cylinders or smart appliance controls, this optimized and very flexible chip will give customers long-term performance that cannot be achieved with existing potentiometer, mechanical switch and slider solutions." Minko Daskalov, Product Manager at Melexis, commented, "Its compact package and outstanding efficiency enhance design freedom and integration, enabling new and innovative solutions for customers."

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