Proving the Business Case for the Internet of Things

IDT sensor can help wearables detect overexposure to sun’s rays

Steve Rogerson
January 19, 2016
Integrated Device Technology has introduced a sensor that accurately detects levels of the ultra-violet A and B spectrum, providing health and wellness capabilities for wearables and other mobile technology. The sensor can detect overexposure and underexposure to the sun’s UVA and UVB rays, provide indoor and outdoor contextual awareness, and give improved image quality for mobile devices.
Developed by engineers at recently acquired Zentrum Mikroelektronik Dresden (ZMDI), the two-channel ZOPT2202 sensor has photodiodes which, when coupled with the sensor’s infra-red light suppression, deliver high-performance UV measurements.
California-based IDT demonstrated the sensor at this month’s Consumer Electronics Show in Las Vegas.
“The risks associated with UV rays – whether getting too much or too little – are well documented,” said Uwe Guenther, product line director at IDT. “Overexposure can lead to skin cancer, and underexposure can result in seasonal affect disorder (SAD) or low of levels of vitamin D. The ZOPT2202 sensor accurately senses the UVA and UVB light spectrum, offering consumers a better understanding of their environment so they can monitor and avoid risks associated with UV exposure.”
The global market for mobile sensing is expected to see strong growth with as many as 1.5 billion units in use expected by 2018. The ZOPT2202 sensor is available in an ODFN 2.0 by 2.2 by 0.7mm package.
Key features include detectable UV index from one to more than 11, operating temperature of -40 to +90ËšC, supply voltage 1.7 to 3.6V, temperature compensation, package optimised for stray light suppression, proprietary filter process providing stable response over angle of incidence, and configurable filters for high volume applications.
The device is available in production quantities, and mobile and wearable designers can order evaluation boards.