Silicon Labs Introduces Industry’s First Digital Ultraviolet Index Sensors

AUSTIN, Texas--(BUSINESS WIRE)--Silicon Labs (NASDAQ: SLAB), a leader in high-performance, analog-intensive, mixed-signal ICs, today introduced the industry’s first single-chip digital ultraviolet (UV) index sensor ICs designed to track UV sun exposure, heart/pulse rate and blood oximetry and provide proximity/gesture control for smartphone and wearable computing products. The latest additions to Silicon Labs’ optical sensor family, the Si1132 and Si114x sensor ICs are ideal for activity-tracking wrist and arm bands, smart watches and smartphone handsets. In addition to enabling UV index sensing, the devices also provide ambient light and infrared (IR) proximity sensing capabilities for health and fitness applications.

The demand for UV sensing in consumer electronics is rising as developers seek to differentiate wearable and handset products with new features that help protect people from harmful UV light exposure. UV tracking is helpful for those with elevated risks of sunburn or concerns about excessive sun exposure. UV sensor-equipped products can measure cumulative UV exposure and alert end users before they have reached unhealthy exposure levels while exercising outdoors. Standardized by the World Health Organization (WHO), the digital UV index is linearly related to the intensity of sunlight and is weighted according to the Erythemal Action Spectrum developed by the International Commission on Illumination (CIE). This weighting provides a standardized measure of our skin’s response to different sunlight wavelengths including UVB and UVA.