OPT3001_15 Datasheet, PDF (1/43 Pages) Texas Instruments – Ambient Light Sensor (ALS)

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OPT3001
SBOS681B – JULY 2014 – REVISED DECEMBER 2014
OPT3001 Ambient Light Sensor (ALS)
1 Features
•1 Precision Optical Filtering to Match Human Eye:
– Rejects > 99% (typ) of IR
• Automatic Full-Scale Setting Feature Simplifies
Software and Ensures Proper Configuration
• Measurements: 0.01 lux to 83k lux
• 23-Bit Effective Dynamic Range with
Automatic Gain Ranging
• 12 Binary-Weighted Full-Scale Range Settings:
< 0.2% (typ) Matching Between Ranges
• Low Operating Current: 1.8 µA (typ)
• Operating Temperature Range: –40°C to +85°C
• Wide Power-Supply Range: 1.6 V to 3.6 V
• 5.5-V Tolerant I/O
• Flexible Interrupt System
• Small-Form Factor: 2.0 mm × 2.0 mm × 0.65 mm
2 Applications
• Display Backlight Controls
• Lighting Control Systems
• Tablet and Notebook Computers
• Thermostats and Home Automation Appliances
• Point-of-Sale Terminals
• Outdoor Traffic and Street Lights
• Cameras
3 Description
The OPT3001 is a sensor that measures the intensity
of visible light. The spectral response of the sensor
tightly matches the photopic response of the human
eye and includes significant infrared rejection.
The OPT3001 is a single-chip lux meter, measuring
the intensity of light as visible by the human eye. The
precision spectral response and strong IR rejection of
the device enables the OPT3001 to accurately meter
the intensity of light as seen by the human eye
regardless of light source. The strong IR rejection
also aids in maintaining high accuracy when industrial
design calls for mounting the sensor under dark glass
for aesthetics. The OPT3001 is designed for systems
that create light-based experiences for humans, and
an ideal preferred replacement for photodiodes,
photoresistors, or other ambient light sensors with
less human eye matching and IR rejection.
Measurements can be made from 0.01 lux up to
83k lux without manually selecting full-scale ranges
by using the built-in, full-scale setting feature. This
capability allows light measurement over a 23-bit
effective dynamic range.
The digital operation is flexible for system integration.
Measurements can be either continuous or single-
shot. The control and interrupt system features
autonomous operation, allowing the processor to
sleep while the sensor searches for appropriate
wake-up events to report via the interrupt pin. The
digital output is reported over an I²C- and SMBus-
compatible, two-wire serial interface.
The low power consumption and low power-supply
voltage capability of the OPT3001 enhance the
battery life of battery-powered systems.
Spectral Response: The OPT3001 and Human Eye
1
OPT3001
0.9
Human Eye
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
300 400 500 600 700 800 900 1000
Wavelength (nm)
D001
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
OPT3001
USON (6)
2.00 mm x 2.00 mm
(1) For all available packages, see the package option addendum
at the end of the datasheet.
Block Diagram
VDD
Ambient
Light
OPT3001
Optical
Filter
VDD
ADC
I²C
Interface
SCL
SDA
INT
ADDR
GND
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.