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Infrared-based dynamic gesture sensor

Maxim Integrated Products has introduced the next generation of its infrared-based dynamic optical sensor, which are able to sense a broader range of gestures at extended distances.

The MAX25405 can detect a wider proximity of movement and doubles the sensing range to 40cm when compared to earlier generations, and this achieved in a device that is a quarter of the size and at 10x lower cost than time-of-flight (ToF) camera-based systems in automotive, industrial and consumer applications. These enhancements offer an alternative to voice communications.

Along with integrated optics and a 6 x 10 infrared sensor array, the MAX25405 includes a glass lens which increases sensitivity and improves the signal-to-noise ratio. The improved performance doubles the proximity and distance of sensing applications to beyond the driver, offering gesture-sensing entertainment displays to the co-driver and rear seat passengers, for example.

The sensor also features a high level of integration compared to competitive ToF solutions that require three chips and a complicated microprocessor. The MAX25405's small 20-pin, 4mm x 4mm x 1.35mm quad flat no-lead (QFN) package together with four discrete LEDs measures up to 75 percent smaller than ToF camera-based solutions.

Key Advantages

  • Wide sensing range: It is able to sense a wider proximity of movement and doubles the sensing range from 20cm to 40cm when compared to earlier infrared generations.
  • Lowest cost and smallest size: The MAX25405 senses swipe, rotation and other important gestures at a lower cost than ToF cameras. High integration results in a total solution size that is significantly smaller than ToF camera solutions.
  • Versatile: The MAX25405 is able to recognise nine gestures, including swipe, rotation, air-click, linger to click and 3 x 2 proximity zones with minimal lag time. Cost effective, this single chip makes gesture-sensing affordable for multi-range automotive, consumer and industrial applications, including touch-free smart home hubs, thermostats and many more.

Author
Neil Tyler

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