IL300-E Linear Optocoupler, High Gain Stability, Wide Bandwidth

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
LED’s 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.
The time and temperature stability of the input-output
coupler gain (K3) is insured by using matched PIN
photodiodes that accurately track the output flux of
the LED.