LT9912 - ETC

LT9912 (LT Series) Analog Optical Isolators

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, Triac.

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.