IL300

IL300 LINEAR OPTOCOUPLER FEATURES Couples AC and DC signals 0.01% Servo Linearity Wide Bandwidth, >200 KHz High Gain Stability, ±0.005%/C Low Input-Output Capacitance Low Power Consumption, < 15mw Isolation Test Voltage, 5300 VACRMS, 1 sec. Internal Insulation Distance, >0.4 mm for VDE Underwriters Lab File #E52744 VDE Approval #0884 (Optional with Option 1, Add -X001 Suffix) IL300G Replaced by IL300-X006 APPLICATIONS Power Supply Feedback Voltage/ Current Medical Sensor Isolation Audio Signal Interfacing Isolate Process Control Transducers Digital Telephone Isolation 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. A typical application circuit (Figure 1) uses an operational amplifier at the circuit input to drive the LED. The feedback photodiode sources current to R1 connected to the inverting input of U1. The ...