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RGB color sensor suits automotive apps

Posted: 30 Jun 2006 ?? ?Print Version ?Bookmark and Share

Keywords:Avago? RGB color sensor? ADJD-E622-QR999?

Avago Technologies unveils the industry's first RGB (red, green, blue) analog-output color sensor that meets the specifications of the Automobile Electronics Council AEC-Q100 Stress Test Qualification for Integrated Circuits, which make these sensors suitable for use in the harsh automotive environments.

The ADJD-E622-QR999 RGB color sensor is a monolithic CMOS IC solution with integrated RGB color filters combined with three sets of 3 x 3 photodiode arrays, one for each color, which is said to minimize the effect of contamination and optical aperture misalignment. The photodiode arrays convert the red, green and blue light components into photocurrents with transimpedance amplifiers then convert the photocurrent to analog voltages. The voltage output of each channel (R, G and B) increases linearly with increasing light intensity, and the gain of each channel can be independently set.

This color sensor is supplied in a Pb-free QFN-16 surface-mount package with dimensions of 5-by-5-by-0.75mm high. The height is 25 percent less than Avago's previously-introduced analog RGB color sensor. This RGB sensor features an extended storage temperature range of -50C to 105C, and operating temperature range of -40C to 85C. It passes the automotive latch-up compliance standard, and offers an human body model (HBM) ESD rating of 8kV and machine model (MM) rating of 200V.

In vehicle interiors, the ADJD-E622-QR999 converts colored light to accurate, proportional red, green and blue voltage outputs. These outputs can potentially be used for open-loop or closed-loop optical feedback for light sources in navigational panels, dashboard and interior lighting. In a closed-loop optical feedback system, the ADJD-E622-QR999 ensures consistent color and brightness for RGB LED lighting and backlighting systems such as in liquid crystal displays.

The combination of a color sensor with RGB LED lighting replaces the limited range of colors available from conventional LEDs with a virtually unlimited palette of lighting colors, according to the company. Because of the RGB color sensor's combination of robust packaging and low sensitivity to ESD, it can also be used in a variety of industrial, commercial and test equipment applications.

The ADJD-E622-QR999 automotive-grade color sensor is priced at $7.10 in quantities of 10,000.

- Gina Roos

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