Light to digital sensor delivers optical power meter functionality

6th September 2016
Posted By : Mick Elliott
Light to digital sensor delivers optical power meter functionality

The OPT3002 light-to-digital sensor from Texas Instruments (TI) is now being shipped by Mouser Electronics. Greatly improving system performance over standard photodiodes and photoresistors, the fully-integrated OPT3002 delivers the functionality of an optical power meter all within a single small device.

Offering a wide spectral bandwidth, flexible and automated light measuring over a 23-bit effective dynamic range, and a simplified software and set-up configuration, this low-power optical sensor is ideal for use in optical spectral systems that require detection of a variety of wavelengths, such as optically-based diagnostic systems, or even as a low-power, battery-operated wake-up sensor.

The sensor is an ambient light sensor (ALS) with a digital output integrated circuit. The OPT3002 features a wide spectral bandwidth that measures light within the device spectral range of 300 nm to 1,000 nm.

Using the device’s built-in, full-scale setting feature, the OPT3002 can take light measurements from 1.2nW/cm2 up to 10mW/cm2 without the need to manually select the full-scale ranges.

This built-in functionality enables capturing of light measurements over a 23-bit effective dynamic range, with results compensated for dark-current effects and other temperature variations.

The OPT3002 captures measurements in either a continuous or single-shot fashion. The optical sensor measures the ambient light and reports the optical power readings directly from its two-wire, I2C- and SMBus-compatible serial interface.

The interrupt pin system can also summarise measurement results with one digital pin. With fully-operational power consumption as low as 0.8 μW at 0.8 SPS on a 1.8V supply, the OPT3002 Light-to-Digital Sensor can be incorporated into a broad array of low-power, sensor-based applications, including security detection systems, system wake-up circuits, medical and scientific instrumentation, lighting controls, tablet and notebook computers and home automation.

The sensor is available in a compact, 6-USON package that measures only 2.0 mm × 2.0 mm × 0.65 mm. To evaluate the OPT3002 under various conditions, the device is also supported by the OPT3002EVM ambient light sensor evaluation module.

The OPT3002EVM features a small form factor module based on two PCBs (a data acquisition board and test board), includes intuitive GUI software, and is designed with 100mil-spaced test points for easy experimentation with external controllers.

Downloads


You must be logged in to comment

Write a comment

No comments




Sign up to view our publications

Sign up

Sign up to view our downloads

Sign up

EPE 2017 ECCE Europe
11th September 2017
Poland Warsaw
DSEI 2017
12th September 2017
United Kingdom ExCeL, London
RWM 2017
12th September 2017
United Kingdom NEC, Birmingham
Productronica India 2017
14th September 2017
India Pragati Maidan, New Delhi
Industry of Things World 2017
18th September 2017
Germany Berlin Congress Center