I2C-ported ambient light sensor delivers rapid outputs directly in lux
Said to be the only commercial ambient light sensor to offer data rates to 3.4 MHz as well as standard data rates, the low-voltage SFH 5712 detects ambient brightness with human-eye sensitivity and converts light intensity to a lux value that it outputs through its I2 C interface. An internal IC automatically provides a measured value between 3 and 65,000 lux twice a second, without the need for any additional control commands.
Primarily intended for mobile devices cell phones, PDAs, navigation devices, netbooks, laptops, and media players the ambient light sensor can be used to rapidly adjust display brightness to extend the host system’s battery life. By transmitting the true lux value, the surface-mount sensor eliminates the need to calculate values using complex formulas in the host system’s control application.
Controlled via its integrated I2 C interface, the sensor consumes only 1.5 µA in standby mode and 150 µA in operation. The sensor measures just 2 x 2 x 0.7 mm, needs only four connections, and is also insensitive to mains-power-related 50- or 60-Hz flickering produced by, say, fluorescent lamps. (Contact Andreas Vogler for pricing available now.)
Osram Opto Semiconductors , Sunnyvale , CA
Andreas Vogler 408-588-3852
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