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Photo sensor fits slimmer mobile phones

Posted: 21 Feb 2006 ?? ?Print Version ?Bookmark and Share

Keywords:APDS-9003? photo sensor? Avago Technologies? Gina Roos?

Avago Technologies has introduced a lower height and shorter version of its analog-output ambient light photo sensor for mobile, consumer, commercial and industrial products. The APDS-9003 sensor is supplied in a miniature six-pin ChipLED Pb-free, surface-mount package with dimensions of 1.6-by-1.5-by-0.55 mm.

Introduced at 3GSM World Congress, the ambient light sensors save battery power in a variety of portable devices including cellphones, PDAs, notebook PCs, portable DVD players, MP3 players, camcorders and digital cameras by detecting the amount of ambient light, then signaling the device when to turn on/off the display's backlight and keypad light.

In large panel displays, the APDS-9003 can lower LCD brightness to reduce eye glare and extend the life of the display. The ambient light sensor can also be used for turning on/off indoor and outdoor lighting, street lighting, and electronic signs and signals.

The APDS-9003 operates over an extended 2.4V to 5.5V supply voltage range, compared to 2.7V minimum for competing products. It also provides a typical 135mA photo current at 100lux to ensure additional drive to control circuitry and operation over the -40C to 85C temperature range.

The ambient light sensor consists of a spectrally-suited photo sensor, which is said to provide excellent responsivity that closely emulates the response of the human eye, and a highly linear proportional output that adjusts the backlighting of a display screen or keypad. The company said these sensors outperform silicon photodiode light-detection solutions because their spectral response peaks close to that of the human eye.

In addition, they provide good suppression of infrared signals, which are the result of interference emitted by natural and artificial light sources. The sensors are said to perform equally well in a range of light sources including natural sunlight, fluorescent, conventional incandescent and halogen lamps.

The APDS-9003 is priced at less than 24 cents each in high-volume quantities.

- Gina Roos

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