ISO100 Datasheet | Burr-Brown

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: 60k Hz q 18-PIN DIP PACKAGE APPLICATIONS q INDUSTRIAL PROCESS CONTROL Transducer Sensing (Thermocouples, RTD, Pressure Bridges) 4m A to 20m A 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 ponents are carefully matched and the amplifier is actively laser-trimmed to assure excellent tracking and low offset errors. The circuit acts as a current-to-voltage converter with a minimum of 750V (2500V test) between input and output terminals. It also effectively breaks the galvanic connection between input and output mons as indicated by the ultra-low 60Hz leakage current of 0.3µA at 250V. Voltage input operation is easily achieved by using one external resistor. Versatility along with outstanding DC and AC performance provide excellent solutions to a variety of challenging isolation problems. For example, the ISO100 is capable of operating in many modes, including: noninverting (unipolar and bipolar) and inverting (unipolar and bipolar) configurations. Two precision current sources are provided to acplish bipolar operation. Since these are not required for unipolar operation, they are available for external use (see Applications section). Designs using the ISO100 are easily acplished with relatively few external ponents. Since VOUT of the ISO100 is simply IINRF, gains can be changed by altering one resistor value. In addition, the ISO100 has sufficient bandwidth (DC to 60k Hz) to amplify most industrial and test equipment...