S6986 Photo IC for synchronous detection of an optical signal in the presence of backgound such as bright sunlight. Light sensor with built in pulse driver circuit and sync detector. Useful as a wide-angle proximity detector or for non-contact bump sensing.
The pulse driver modulates the output of an external LED (not included). The LED will illuminate the target with modulated light; reflected light in sync with the output is detected by the S6986, making detection relatively insensitive to ambient lighting.