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STMicroelectronics unveils digital UV sensor for mobile devices

Posted: 26 Feb 2015 ?? ?Print Version ?Bookmark and Share

Keywords:UV sensor? wearable? mobile devices? Internet of Things?

STMicroelectronics announces the UVIS25, a compact sensor designed to provide a digital output of the Ultraviolet Index (UVI), the international measurement of the strength of ultraviolet (UV) radiation. The UVIS25 sensor is designed for applications in wearable devices, mobile devices, and weather-station equipment.

Exposure to UV radiation can affect people in ways that range from temporary sunburn to more serious conditions. UVI was developed, adopted, and standardised in the mid '90s by the World Health Organisation and the World Meteorological Organisation to provide guidance on exposure to solar UV radiation so that people could take appropriate precautions to avoid harmful effects.

The UVIS25 is a digital ultra-compact UV sensor aimed at all UV-sensing markets, including wearable devices, smartphone and tablet apps, and weather-station equipment. Leveraging patented ST technology, the device is sensitive to UV waves in the 200-400nm range, encompassing the key UV-A (315-400nm) and UV-B (280-315nm) wavelengths that are of greatest concern to human-health effects. Delivering more than just sensing, the UVIS25 calculates the UVI internally, uniquely eliminating the need for external processing algorithms or calibration on the customer's manufacturing line.

UV sensor

"Today, with ozone layer depletion, higher levels of UV radiation reaching the earth's surface are more frequent. This new UV sensor is yet another demonstration of ST's ability to enable new products and applications; it will help people to be sun-savvy and to live healthier lives," said Francesco Italia, STMicroelectronics General Manager, High-End Sensor and Analogue Division.

Key technical features of the UVIS25 include a UVI output range of 0-15 with a resolution of just 1/16, SPI and I2C interfaces, 1.7 to 3.6V supply voltage range, and the ability to provide updated UVI values as often as every second. The device is supplied in a 2.5mm x 2.5mm x 0.76mm LGA-10L transparent moulded package.

Samples of the UVIS25 are available now, with volume production scheduled for the end of Q2 2015. Unit pricing is $1.70 for orders of 1,000 pieces.

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