EL817(S1)(C)(TA)-VG

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Optoisolators are a type of electronic component which are used for isolating electrical signals or providing galvanic isolation between two circuits. The EL817 (S1)(C)(TA)-VG is an optoisolator designed for isolating analog and digital signals. It is typically used in applications where accurate data transmission and electrical safety are desired. This article will discuss the application field and working principle of the EL817 (S1)(C)(TA)-VG.

The EL817 (S1)(C)(TA)-VG is a three terminal integrated optoisolator with a transistor output, a photovoltaic cell and a Zener diode. The optoisolator is designed for use in both digital and analog systems. Its function is to isolate a signal from the connected circuit while still allowing data transfer. It can be used in virtually any application where the ability to transfer signals between two circuits without compromising electrical safety is desired. Examples of such applications include the isolation of an input signal from a control circuit in a motor, the isolation of a high voltage source from a circuit containing sensitive components, and the isolation of digital signals from an analog source.

The working principle of the EL817 (S1)(C)(TA)-VG is as follows. A photodiode is connected between the input terminal and a bias resistor, and its output is connected to the base of a npn junction transistor. When light is detected by the photodiode, a current will flow through the diode and the transistor, turning the transistor on and allowing current to flow from the collector to the emitter. A Zener diode is connected between the collector and the emitter, reverse biasing the transistor so that it does not saturate and allowing the current in the collector to remain under control. The output terminal is connected to the transistor\'s collector, allowing the signal from the source to be safely transmitted across the isolation barrier.

The EL817 (S1)(C)(TA)-VG optoisolator offers several advantages over traditional optoisolators. It is suitable for both digital and analog signal isolation, and is much more robust than regular photodiodes. It is also very small in size, making it easy to integrate into any application where signal isolation is needed. The Zener diode also ensures that the output voltage remains under control, allowing the device to be used in high voltage applications without any risk of overvoltage.

In conclusion, the EL817 (S1)(C)(TA)-VG is an optoisolator designed for applications where accurate data transmission and electrical safety are desired. It uses a photodiode and a transistor output, along with a Zener diode, to isolate signals from the connected circuit and allow safe data transfer. The EL817 (S1)(C)(TA)-VG is suitable for both digital and analog applications, and its small size and robust design make it an excellent choice for most signal isolation needs.

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