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LT9913

ETC
Part Number LT9913
Manufacturer ETC
Description (LT Series) Analog Optical Isolators
Published Apr 13, 2006
Detailed Description ( DataSheet : www.DataSheet4U.com ) analog optical isolators Features • High input-to-output voltage isolation • True r...
Datasheet PDF File LT9913 PDF File

LT9913
LT9913

Overview
( DataSheet : www.
DataSheet4U.
com ) analog optical isolators Features • High input-to-output voltage isolation • True resistance element output • Single- or dual-element outputs available • Low cost • Suitable for AC or DC use • Wide range of input-to-output characteristics • Low drive current • Low “on” resistance, high “off ” resistance • Complete solid-state construction Typical Applications • DC Isolators • Feedback Elements in Automatic Gain Control Circuits • Audio Limiting and Compression • Noiseless Switching • Logic Interfacing • Remote Gain Control for Amplifiers • Photochoppers • Noiseless Potentiometers Principle of Operation Analog Optical Isolators are used in many different types of circuits and applications.
Available Related Products VTL5C Series LT3011 Series LT9900 Series Datasheets available upon request Description PerkinElmer Optoelectronics has been a leading manufacturer of analog optical isolators (AOI) for over twenty years and makes a broad range of standard parts under its trademark VACTROL®.
There are many kinds of optical isolators, but the most common is the LED/phototransistor type.
Other familiar types use output elements such as light-sensitive SCRs, Triacs, FETs and ICs.
The major application for these silicon-based devices is to provide electrical isolation of digital lines connected between different pieces of equipment.
The principle of operation is very simple.
When an input current is applied to the LED, the output phototransistor turns on.
The only connection between the LED and phototransistor is through light—not electricity—thus the term optical isolator.
These optical isolators are primarily digital in nature with fast response times for interfacing with logic gates.
Rise and fall times of a few microseconds, faster for some isolators, are typical.
The AOI also uses an optical link between input and output.
The input element is an LED and the output element is always a photoconductive cell or, simply a photocell.
Togethe...


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