VTL5C2SLASH2 datasheet(37/76 Pages) PERKINELMER

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Typical Applications of Analog Optical Isolators

Why Use Analog Optical Isolators?

PerkinElmer Optoelectronics’ line of analog optical isolators (AOIs) consists of a light tight package which houses a light source and

one or more photoconductive cells. Through control of the input current or voltage applied to the AOI, the output resistance can be

varied. The output resistance can be made to switch between an “on” and “off” state or made to track the input signal in an analog

manner. Because a small change in input signal can cause a large change in output resistance, AOIs have been found to provide a

very economic and technically superior solution for many applications. Their general characteristics and salient features can be

summarized as follows:

•

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

Applications

Analog Optical Isolators are used in many different types of circuits and applications. Here is a list of only a few examples of where

AOIs have been used.

•

DC isolators

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Feedback elements in automatic gain control circuits

•

Audio limiting and compression

•

Noiseless switching

•

Logic interfacing

•

Remote gain control for amplifiers

•

Photochoppers

•

Noiseless potentiometers

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