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First color sensor to support two-wire serial interface

Posted: 06 Mar 2006 ?? ?Print Version ?Bookmark and Share

Keywords:ADJD-S313-QR999? digital color sensor? Avago Technologies? Gina Roos?

ADJD-S313-QR999 CMOS digital color sensor

Avago Technologies said it has introduced the industry's first CMOS digital color sensor that can be directly interfaced to a microcontroller without the need for additional components. It also offers a small package size and low power consumption for portable devices.

The ADJD-S313-QR999 digital color sensor can be interfaced to the system microcontroller via the sensor's two-wire serial interface. It operates from a 2.6V supply voltage, which provides lower power consumption for portable devices. Supplied in a small 20-pin QFN package (5-by-5-by-0.75mm), it's said to be 50 percent thinner than competitive products, which also make the device suitable for portable devices such as cellphones, MP3 players and PDAs. Other applications include color measurement in portable medical equipment, and color detectors and readers.

The company said by using a standard two-wire serial interface and integrated ADC instead of a variable frequency, square-wave TTL output, it translates into a simpler interface with more flexible optical-to-electrical signal conversion. In addition, the integrated ADC helps remove unwanted noise caused by analog signal preconditioning.

The color sensor's basic architecture consists of integrated RGB filters built on a uniformly distributed photodiode array, a logic control core and a gain selector with an ADC that supports digital communication. The uniform RGB filters and photodiode array minimize the effect of light-gradients caused by optical misalignment and irregularity of surfaces, said the company.

With a wide sensing range the ADJD-S313-QR999 sensor can be used for many applications with different light levels by adjusting the gain setting. Other features include a selectable sleep mode to minimize current consumption when the sensor is not in use, and operation over the temperature range of 0C to 70C. The device is lead free.

The ADJD-S313-QR999 color sensor is priced at $2.90 each in quantities of 50,000 to 100,000. Samples and production quantities are available now.

- Gina Roos

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