Dynamic gesture sensor detects at extended range

6th July 2021

Alex Lynn

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Maxim Integrated Products has introduced the next generation of its infrared-based optical dynamic gesture sensor, able to sense a broader range of gestures at extended distances. The MAX25405 detects a wider proximity of movement and doubles the sensing range to 40cm when compared to earlier generations, all in a quarter of the size and at ten times lower cost than time-of-flight (ToF) camera-based systems in automotive, industrial and consumer applications.

These enhancements offer an alternative to voice communications, enabling drivers to focus on the road.

Along with integrated optics and a 6x10 infrared sensor array, the next-generation MAX25405 now 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 MAX25405 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, 4x4x1.35mm quad flat no-lead (QFN) package together with four discrete LEDs measures up to 75% smaller than ToF camera-based solutions.

Key advantages

Wide sensing range: The MAX25405 senses 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 recognises nine gestures, including swipe, rotation, air-click, linger to click and 3x2 proximity zones with minimal lag time. This cost-effective single chip makes gesture-sensing affordable for multi-range automotive, consumer and industrial applications, including touch-free smart home hubs, thermostats and many more.

"Maxim Integrated's MAX25405 recognises the most dynamic gestures at the lowest cost, allowing automakers to avoid the prohibitive cost of time-of-flight cameras and to help keep drivers' eyes on the road," said Szu-Kang Hsien, Director for the Automotive Business Unit at Maxim Integrated. "The affordable gesture sensing feature adds value to low- and mid-range cars, while offering passengers the luxury of touch-free gesture control."

The MAX25405 gesture sensor and associated MAX25405EVKIT# evaluation kit are available now from Maxim and authorised distributors; pricing available upon request.