• High precision, high speed color light-to-digital conversion over high speed I2C interface
• Four channel sensing using precision optical filters:
  • XYZ tristimulus channels with close matching to CIE 1931 spectra with excellent IR rejection
  • Clear wide bandwidth channel
• High resolution color measurement in CIE XY, LUV space, correlated color temperature (CCT) along with ambient lux measurement
• Semi-logarithmic output with 7 binary logarithmic full-scale light range and highly linear response within each range
• Built-in automatic full-scale light range selection logic, which switches measurement range based on input light condition with excellent gain matching between ranges
• 26 bits of effective dynamic range from 2.15 mlux to 144 klux
• 12 configurable conversion times from 600 μs to 800 ms per channel is an excellent choice for a wide variety of high speed and high precision applications
• External pin interrupt for hardware synchronized trigger and interrupts
• Low operating current: 24 μA with ultra-low power standby: 2 μA
• Operating temperature range: –40°C to +85°C
• Wide power-supply range: 1.6 V to 3.6 V
• 5.5-V Tolerant I/Os
• Selectable I²C address
• Small-form factor:
  • 2.1 mm x 1.9 mm x 0.6 mm SOT-5X3 package

• Display brightness & color adjustments
• Camera image correction
• Auto white balancing
• Building automation & control
• Lighting control systems
• Tablet and notebook computers

The OPT4048 is a single-chip high resolution color sensor, capable of measuring 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 OPT4048 has a selectable addressing scheme to enable up to 4 devices on a shared I²C bus. The spectral response of the channels have been specially tuned to closely mimic the CIE tristimulus spectra to get the most accurate color detection, with strong rejection for wavelengths away from their respective peaks, especially the NIR (850 nm & 940 nm) region. The filters use an advanced filter technology which provides excellent filter performance even at higher angles of light incidence. This device, with high accuracy color sensing capability, enables several applications requiring precise sensing of ambient light color and color temperature.