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http://www.ti.com/general/docs/suppproductinfo.tsp?distId=26&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Fopt4048″>View Datasheet
Texas Instruments OPT4048 Tristimulus XYZ Color Sensor is a single-chip high-resolution color sensor that measures four channels, each with specific engineered spectral responses. Three of the four channels closely match the CIE tristimulus spectra, with the fourth channel having a wide-band spectral response. With measurements from these channels, important characteristics of the lighting environment can be extracted, like (i) light intensity (lux), (ii) color in CIE XY, LUV coordinates, and (iii) Correlated Color Temperature. The OPT4048 is available in a small SOT-5X3 package.
The Texas Instruments OPT4048 has a selectable addressing scheme to enable up to four devices on a shared I2C bus. The spectral response of the channels has been specially tuned to closely mimic the CIE tristimulus spectra to get the most accurate color detection. It provides strong rejection for wavelengths away from the respective peaks, especially the NIR (850 nm and 940 nm) region. The filters use an advanced filter technology that provides excellent filter performance even at higher angles of light incidence. With high-accuracy color sensing capability, this device enables several applications requiring precise sensing of ambient color temperature and light color.
The digital operation is flexible for system integration. Measurements can be either continuous or triggered in one shot with register writes or hardware pins. The device features a threshold detection logic, which allows the processor to sleep while the sensor watches for the appropriate wake-up event to report via the interrupt pin. Digital output, representing the light level, is reported over an SMBus and I2C compatible, two-wire serial interface. The low power consumption and low power-supply voltage capability of the OPT4048 help enhance the battery life of battery-powered systems.
