The MLX90393 EVB measures 30 x 30mm, and offers engineers a platform for constructing a wide variety of human machine interfaces with the potential for a high degree of sophistication. This relatively simple slide, push/pull and linear swipe switches through to more complex 3D sensing systems, such as joysticks or rotary knobs with push functions included.
Using Melexis’ Triaxis technology, the 16-bit resolution MLX90393 sensor IC on each EVB has the capacity to deliver a digital output proportional to the detected magnetic flux density along three perpendicular axes (X, Y and Z). There is also provision for thermal measurement. The IC acts like a building block for position sensing systems in a broad spectrum of applications. It presents engineers with a wide array of configurable parameters, allowing them to optimise their system for either high speed measurement, elevated signal integrity or low power consumption.
Both SPI and I ²C interfaces are featured on the EVB, making it easy to integrate with an external microcontroller. There is also a pad incorporated onto the board for the connection of a decoupling capacitor if required, as well as pads for optional pull-up and pull-down resistors for I ²C addressing and bus line supply. An operational temperature range spanning from -20°C to +85°C is supported.
The EVB is supplied with a MLX90393 IC soldered directly to the PCB, along with 3 extra ICs to accompany it. A QR code link printed on the underside of the board permits immediate access to all the relevant documentation available on the Melexis website. From here sample code can also be downloaded.