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OPT3002 Light-to-Digital Sensor
OPT3002
SBOS745A – MAY 2016 – REVISED JUNE 2016
1 Features
•1 Wide Optical Spectrum: 300 nm to 1000 nm • Automatic Full-Scale Setting Feature Simplifies
Software and Configuration • Measurement Levels:
– 1.2 nW/cm2 to 10 mW/cm2 • 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: –40°C to +85°C • Wide Power-Supply: 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
• Intrusion and Door-Open Detection Systems • System Wake-Up Circuits • Medical and Scientific Instrumentation • Display Backlight Controls • Lighting Control Systems • Tablet and Notebook Computers • Thermostats and Home Automation Appliances • Outdoor Traffic and Street Lights
3 Description
The OPT3002 light-to-digital sensor provides the functionality of an optical power meter within a single device. This optical sensor greatly improves system performance over photodiodes and photoresistors. The OPT3002 has a wide spectral bandwidth, ranging from 300 nm to 1000 nm. Measurements can be made from 1.2 nW/cm2 up to 10 mW/cm2, without the need to manually select the 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 results are compensated for dark-current effects, as well as other temperature variations.
Use the OPT3002 in optical spectral systems that require detection of a variety of wavelengths, such as optically-based diagnostic systems. The interrupt pin system can summarize the result of the measurement with one digital pin. Power consumption is very low, allowing the OPT3002 to be used as a low-power, battery-operated, wake-up sensor when an enclosed system is opened.
The OPT3002 is fully integrated and provides optical power reading directly from the I2C- and SMBuscompatible, two-wire, serial interface. Measurements are either continuous or single-shot. The OPT3002 fully-operational power consumption is as low as 0.8 µW at 0.8 SPS on a 1.8-V supply.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
OPT3002
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.
Normalized Response
1 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1
0 300
Spectral Response
400 500 600 700 800 Wavelength (nm)
OPT3002
900 1000
D001
Light
Block Diagram
VDD
OPT3002
ADC
VDD
I2C Interface
SCL SDA INT ADDR
GND Copyright © 2016, Texas Instruments Incorporated
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.
OPT3002
SBOS745A – MAY 2016 – REVISED JUNE 2016
www.ti.com
Table of Contents
1 Features .................................................................. 1 2 Applications ........................................................... 1 3 Description ............................................................. 1 4 Revision History..................................................... 2 5 Pin Configuration and Functions ......................... 3 6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ...................................... 4 6.2 ESD Ratings.............................................................. 4 6.3 Recommended Operating Conditions....................... 4 6.4 Thermal Information .................................................. 4 6.5 Electrical Characteristics........................................... 5 6.6 Timing Requirements ................................................ 6 6.7 Typical Characteristics .............................................. 7 7 Detailed Description ............................................ 10 7.1 Overview ................................................................. 10 7.2 Functional Block Diagram ...................................... 10 7.3 Feature Description................................................. 11 7.4 Device Functional Modes........................................ 13 7.5 Programming........................................................... 16
7.6 Register Maps ......................................................... 19 8 Application and Implementation ........................ 26
8.1 Application Information............................................ 26 8.2 Do's and Don'ts ...................................................... 27 9 Power-Supply Recommendations...................... 27 10 Layout................................................................... 28 10.1 Layout Guidelines .........