Digital Sensor Does Proximity And Ambient Light

The SFH 7770 combines a digital ambient light sensor and proximity sensor in a package measuring 2.8 mm x 2.8 mm x 0.9 mm. It determines the ambient brightness, detects the presence of an object nearby, and can tell whether the object is moving closer or moving further away. Applications in cell phones and smart phones, for example, can be controlled without touching the phone. Of note, the device consumes 350 µA during operation and 5 µA in standby mode. The proximity sensor specifies a sensitivity across a range from 1 µW/cm² to 10 mW/cm², allowing it to operate at distances of up to 30 cm. When measuring brightness, the ambient light sensor returns a lux value between 3 and 65,000 lx so that the display brightness adapts precisely to ambient light conditions. OSRAM OPTO SEMICONDUCTORS, San Jose, CA. (888) 446-7726.