This part is a kind of semiconductor called ISO100.

Function of this product has Optically-Coupled Linear ISOLATION AMPLIFIER.

Manufacturers : Burr-Brown Corporation

Image and pinout :

Some of the text within the PDF file :

ISO 100 ISO100 Optically-Coupled Linear ISOLATION AMPLIFIER FEATURES q EASY TO USE, SIMILAR TO AN OP AMP VOUT/IIN = RF, Current Input VOUT/VIN = RF/RIN, Voltage Input q 100% TESTED FOR BREAKDOWN: 750V Continuous Isolation Voltage q ULTRA-LOW LEAKAGE: 0.3µA, max, at 240V/60Hz q WIDE BANDWIDTH: 60kHz q 18-PIN DIP PACKAGE APPLICATIONS q INDUSTRIAL PROCESS CONTROL Transducer Sensing (Thermocouples, RTD, Pressure Bridges) 4mA to 20mA Loops Motor and SCR Control Ground Loop Elimination q BIOMEDICAL MEASUREMENTS q TEST EQUIPMENT q DATA ACQUISITION DESCRIPTION The ISO100 is an optically-coupled isolation amplifier. High accuracy, linearity, and time-temperature stability are achieved by coupling light from an LED back to the input (negative feedback) as well as forward to the output. Optical [ ... ]

ISO100 PDF Datasheet Download