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.