4N35-X007T Isolators

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Optoisolators are one of the most widely used isolation components for signal transmission and power distribution. A common type of optoisolator is the transistor, photovoltaic output, such as the 4N35-X007T. In this article, we will discuss the application field and working principle of the 4N35-X007T.

Application Field of 4N35-X007T

The 4N35-X007T optoisolator is most commonly used to isolate high-level analog and digital signals. It can also be used as a voltage regulator, providing a safe current protection barrier between sensitive equipment and high-voltage power sources. It can be used in a variety of applications to protect both input and output signals from interference or destruction due to electrical surges.

The 4N35-X007T optoisolator can also be used to isolate power sources from sensitive equipment, as it is capable of blocking currents up to 250V AC at 50/60 Hz. It can provide protection from over-voltage, transient voltage, and inductive kick caused by load switching in industrial applications. In addition, it can be used for noise suppression in automotive applications, as it filters out noise signals.

Working Principle of 4N35-X007T

The 4N35-X007T optoisolator is a photocoupler with a Type 2 pinout, meaning that it has two pins. The first pin is responsible for receiving the input signal, which is then modulated into a light signal by an infrared LED. This light signal is converted into an electrical signal by a phototransistor, which is then outputted on the second pin. This allows for isolation of the input and output signals, preventing electrical noise from affecting the performance of the device.

The 4N35-X007T optoisolator is composed of a phototransistor and a direct transmissive type of infrared emitting diode (IRED). When an input signal is applied to the input pin, the IRED is activated, emitting an infrared light beam which is detected by the phototransistor. The phototransistor then conducts, allowing the output signal to be passed through, with isolation between the input and output.

The 4N35-X007T optoisolator is designed for high-speed operation, with a maximum propagation delay time of 1.3µS. It is also designed to provide high common mode rejection ratio (CMRR) values, ensuring that signal noise is reduced and the desired input signal is accurately transmitted to the output. In addition, it also features a higher than usual LED current of 3mA, which allows for better sensor performance.

Conclusion

The 4N35-X007T optoisolator is a commonly used device for isolating both analog and digital signals, as well as providing protection from electrical surges. It is composed of an IRED and a phototransistor, which modulate input signals into an output signal with isolation, ensuring that signal noise and interference are reduced. With its high speed, high CMRR, and high LED current, the 4N35-X007T is a reliable and cost-effective solution for a variety of signal transmission and power distribution applications.

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