Optocoupler/LED/nixie tube/photoelectric device

The FOD2741 opto-isolated amplifier includes the popular KA431 precision programmable shunt voltage reference and optocoupler. The optocoupler is a gallium arsenide (GaAs) light-emitting diode optically coupled to a silicon phototransistor. It has 3 levels of reference voltage with tolerance = 2%, 1% and 0.5%. The range of current transfer ratio (CTR) is 100%-200%. It also has an outstanding temperature coefficient of 50 ppm/°C. It is primarily used as an error amplifier/reference voltage/optocoupler in isolated AC-to-DC power supplies and DC/DC converters. When using the FOD2741, power supply designers can reduce the number of components and save space in tight encapsulation designs. Tight tolerance references make adjustments unnecessary in many applications. The device features an 8-pin DIP white encapsulation.

The FODM452 and FODM453 optocouplers consist of an AlGaAs LED optically coupled to a high-speed photodetector transistor. The device is available in a compact 5-pin micro-flat encapsulation for optimal packing density. The FODM453 has a high CMR rating for optimized common-mode transient immunity.