Optocoupler/LED/nixie tube/photoelectric device

The FOD2711A opto-isolated amplifier consists of the popular AZ431L precision programmed shunt reference and optocoupler. The optocoupler is a gallium arsenide (GaAs) light emitting diode optically coupled to a silicon phototransistor. The reference voltage tolerance is 1%. Current Transfer Ratio (CTR) ranges from 100% to 200%. It is primarily used as an error amplifier/reference voltage/optocoupler function in isolated AC-DC power supplies and DC-DC converters. When using the FOD2711A, power supply designers can reduce component count and save space in compact encapsulation designs. The tight tolerance range reference eliminates the need for adjustment in many applications. The device features an 8-pin DIP white encapsulation.

The FOD073L optocoupler consists of an AlGaAs LED optically coupled to a high gain split Darlington photodetector. The device is specified to operate at 3.3V. The split Darlington configuration separates the input photodiode and first-stage gain from the output transistor, which reduces output saturation voltage and increases operating speed compared to traditional Darlington phototransistor optocouplers. Integrated emitter-base resistors provide best-in-class stability over temperature. The combination of an extremely low input current of 0.5mA and a high current transfer rate of 2000% makes this device ideal for interfacing with MOS, CMOS, LSTTL and EIA RS232C inputs while ensuring output compatibility with LVCMOS and high fanout LVTTL Require. An internal noise shield provides excellent common-mode rejection of 10 kV/µs.