IS2801-4 Isolators

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Optoisolators are components used to maintain electrical isolation between two circuits. They generally consist of an opto-coupler, an LED and a photoreceptor. IS2801-4 is a particular type of optoisolator, specifically a transistor, photovoltaic output. This article will discuss the application fields and working principle of the IS2801-4.

Application Field

IS2801-4 is used in various application fields, such as audio/video, automotive, computing interfaces, consumer, industrial, medical, communications, and lighting. Some applications that these optoisolators are often used for include data monitoring and communications, power controls, isolated audio, thermocouple, strain gage, and 4-20 mA current loops.

Working Principle

The basic working principle of transistor photovoltaic output optoisolators, such as IS2801-4, is fairly simple. An input signal is provided, from an electronic device, to the LED side of the optoisolator. This LED then emits a light that is used to activate an output device, such as a transistor. This transistor is then used to provide an output signal that is completely electrical isolated from the input signal.

This type of optoisolator is designed to work at higher voltages, up to as much as 250V, and provides reliable and accurate electrical isolation. It is designed to have a low power consumption so that it can be used in battery powered systems. Additionally, they are designed to have a low capacitance, making them ideal for use in data transmission applications.

The IS2801-4 in particular is a general-purpose, open-collector optoisolator with a photocoupler IC input. It also has a short response time of less than 2 ms, making it suitable for use in systems with high-speed data transmission. The device is designed to have a long life, of up to 50 years, and it can operate over a wide temperature range of -40°C to +85°C.

Conclusion

The IS2801-4 is a transistor photovoltaic output optoisolator that is commonly used in various applications, such as audio/video, automotive, computing interfaces, consumer, industrial, medical, communications, and lighting. It provides reliable and accurate electrical isolation and is designed to have a low power consumption, low capacitance, and a long life. It is a general-purpose, open-collector optoisolator with a photocoupler IC input and a short response time of less than 2 ms.

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