OPI1290-032

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Optoisolators - Logic Output

The OPI1290-032 is one of the most common optically isolated output logic components. It is used in a variety of applications to reduce interference caused by power supply differences or device electro magnetic fields, while preserving data accuracy by using an optical interface. This device could be particularly useful in optical logic applications or situations with electrical or physical separation between two points.

Working Principle

The OPI1290-032 features an integral 6-pin diode configuration consisting of a light-emitting diode (LED) and a photo-transistor. This diode is connected to a drive voltage, which causes current to flow through the diode and generate light. The incoming light onto the photo-transistor then causes it to turn ON, thus delivering a logic signal to the application circuit. The advantage of using this type of optically isolated output logic is that the electrical load is isolated from the driving circuit.

Application Fields

The OPI1290-032 is commonly used in a variety of applications, including protecting sensors from electromagnetic interference (EMI). By using optically isolated output logic, the device can detect sensor signals in the presence of high levels of static fields without causing false triggering or incorrect logic levels. Additionally, this device is ideal for controlling loads with high powers or currents, segregating the control circuit from the load.

The OPI1290-032 is also found in signal isolation applications. By using an LED and a photo-transistor, the device acts like a transformer, which isolates the input and output circuits electrically. In this way the input signal stays intact and does not interfere with nor suffering from ground loops or suppressing the output signal due to voltage differences. This allows for safe signal transfer across two electrically isolated points.

The OPI1290-032 can also be used in converters or switches, especially in industrial applications. By using a relay to switch the load, this device is able to perform reliable ON/OFF switching of different types of loads. Moreover, applications like motor control, alarm circuits, and other opto-mechanical switches can be implemented using this basic optoisolator.

Conclusion

The OPI1290-032 optically isolated output logic device is widely used in a variety of applications. Because of its built-in LED and photo-transistor, it can effectively reduce interference caused by power supply differences or device electro magnetic fields, allowing for a reliable, accurate data transfer. Moreover, this device is also useful to protect sensors from EMI, control loads with high powers or currents, and perform reliable ON/OFF switching of different types of loads.

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