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    Maxim Integrated > Development Platforms and Kits > Reference Designs >
    • 3D Human Interface Input
    • High Precision Weigh Scale
    • Low Power ADC
    • Compact
    Maxim’s MAXREFDES82# features a next generation industrial, smart force sensor. Mounted on a quadrant of load cells channeled into a multi-channel, 24-bit analog-to-digital converter (ADC), MAXREFDES82# senses weight and center of mass for objects placed on the platform. The scale provides full-scale responses up to 780g.

    The user interface provides an active display of center of mass on the platform, as well as total measured weight. In addition to serving as a smart force sensor, the design works very well as a ruggedized touch interface with force sensing. The system consumes less than 50mA during normal operation and features a USB interface for quick evaluation and integration.

    This reference design is an industrial, smart force sensor. The design measures mass, as well as the center of mass of the object on it. This combination of features and speed means that MAXREFDES82# operates as both a weigh scale and a touch interface with force sensing. Built with a plastic plate, the system ideally meets the needs of industrial human machine interfaces (HMI).

    The reference design features the MAX11254 24-bit, 6-channel, 64ksps delta-sigma ADC with SPI interface. Four load cells are mounted on a quadrant plane to detect touch forces applied on the flat plastic plate. Based on the forces applied on each individual load cell, the system displays the total force magnitude, and the coordinates of the force center. The force magnitude and coordinates are scanned approximately each 10 milliseconds.

    Applications:
    • 3D Human Interface Input Device
    • Battery-Powered Instrumentation
    • Industrial Control and Measurement