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ams - Color Light-To-Digital Converter

Numéro de référence TCS3771
Description Color Light-To-Digital Converter
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TCS3771 fiche technique
General Description
TCS3771
Color Light-To-Digital Converter with
Proximity Sensing
The TCS3771 family of devices provides red, green, blue, and
clear (RGBC) light sensing and proximity detection (when
coupled with an external IR LED). They detect light intensity
under a variety of lighting conditions and through a variety of
attenuation materials. The proximity detection feature allows a
large dynamic range of operation for use in short distance
detection behind dark glass such as in a cell phone or for longer
distance measurements for applications such as presence
detection for monitors or laptops. The programmable proximity
detection enables continuous measurements across the entire
range. In addition, an internal state machine provides the ability
to put the device into a low power mode in between RGBC and
proximity measurements providing very low average power
consumption.
The TCS3771 is directly useful in lighting conditions containing
minimal IR content such as LED RGB backlight control, reflected
LED color sampler, or fluorescent light color temperature
detector. With the addition of an IR blocking filter, the device is
an excellent ambient light sensor, color temperature monitor,
and general purpose color sensor.
The proximity function is targeted specifically towards
battery-powered mobile devices, LCD monitor, laptop, and
flat-panel television applications. In cell phones, the proximity
detection can detect when the user positions the phone close
to their ear. The device is fast enough to provide proximity
information at a high repetition rate needed when answering
a phone call. It can also detect both close and far distances so
the application can implement more complex algorithms to
provide a more robust interface. In laptop or monitor
applications, the product is sensitive enough to determine
whether a user is in front of the laptop using the keyboard or
away from the desk. This provides both improved green power
saving capability and the added security to lock the computer
when the user is not present.
Ordering Information and Content Guide appear at end of
datasheet.
ams Datasheet, Confidential
[v1-20] 2014-Aug-06
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