DESCRIPTION

The IL300 linear optocoupler consists of an AlGaAs IRLED irradiating an isolated feedback and an output PIN photodiode in a bifurcated arrangement. The feedback photodiode captures a percentage of the LEDs flux and generates a control signal (IP1) that can be used to servo the LED drive current. This technique compensates for the LED’s non-linear, time, and temperature characteristics. The output PIN photodiode produces an output signal (IP2) that is linearly related to the servo optical flux created by the LED.

FEATURES

• Couples AC and DC signals

• 0.01 servo linearity

• Wide bandwidth, > 200 kHz

• High gain stability, ± 0.005 /°C typically

• Low input-output capacitance

• Low power consumption, < 15 mW

• Isolation rated voltage 4420 VRMS

• Internal insulation distance, > 0.4 mm

APPLICATIONS

• Power supply feedback voltage / current

• Medical sensor isolation

• Audio signal interfacing

• Isolated process control transducers

• Digital telephone isolation