1 Features
• 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

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

3 Description
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.