Osram Opto Semiconductors SFH 5712 ambient light sensor

The SFH 5712 from Osram Opto Semiconductors is a low-voltage digital ambient light sensor that converts light intensity to digital signal output capable of direct I²C interface, detecting ambient brightness in the same way the human eye does.

It is claimed to be the only sensor to offer not only standard data rates but also high speed rates of up to 3.4 MHz. An integrated circuit in the sensor automatically provides a measured value between three and 65,000 lux twice a second, without the need for any additional control commands.

The sensor has only four connections and can be controlled via its integrated I²C interface.

It is primarily intended for mobile applications in which the brightness of the display is constantly adjusted according to available ambient light. The main beneficiaries are mobile phones, PDAs, navigation devices, netbooks, laptops and media players.

It is insensitive to mains power-related 50-60 Hz flickering that is produced, for example, by fluorescent lamps. With 150 µA during operation and only 1.5 µA in stand-by mode, the sensor consumes little power.