Ambient Light Sensors Operate Behind Darkened Glass

The first members of the company’s next generation digital ambient light sensor and proximity detection family eliminate the need to use clear glass/plastic in front of the sensor or drill holes/slots into the display, bezel, or frame in order for light to reach the sensor. Designed to operate behind darkened glass or other translucent materials, the TSL2771 family provides both ambient light sensing and proximity detection while allegedly consuming far less power than comparable components. They incorporate an IR LED current-limited driver, ADC, interrupt capability, multiple I²C interface voltage options, and flexible programming. A patented dual-photodiode architecture allows the sensor system to compensate for the increased IR component that occurs behind dark glass.  When combined with the ability to adjust the analog gain settings up to 128X, the device excels in challenging low-light level applications. Pricing starts at $0.75 each/1,000. TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS INC., Plano, TX. (972) 673-0759.