EL851

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The EL851 is an optoisolator which is one of the most common types of isolation component. The EL851 single-channel 3-pin type optical isolator consists of an isolated input, an optical element, and an isolated output. The two sides of the optoisolator are typically required to be electrically isolated. Optoisolators are used in a wide range of applications due to their ability to provide galvanic isolation as well as amplitude and/or frequency isolation. The EL851 is based on a photovoltaic output transistor optoisolator design.

When the input port of EL851 is activated, a signal in the form of light passes from the input side of the optoisolator to the optical element. The light signal is then converted to an electrical current, which is amplified by the transistor on the output side of the EL851. This amplified electrical signal is then fed into the output. Thus, electrical isolation is achieved between input and output.

The EL851 optoisolator can be used in a variety of applications such as motor control, HVAC, and electrical safety. This device is also suitable for data transmission in the range of 10KHz~50KHz in dry or wet conditions. In motor control applications, the EL851 can be used to control the speed of motors as its bipolar transistor output can switch both analog and digital signals. In HVAC applications, the EL851 can be used to control the flow of air, which is essential for efficient and timely heating and cooling. Finally, the EL851 can be used in electrical safety applications by providing electrical isolation between two circuits, thereby preventing electrical shock.

In addition to the applications listed above, the EL851 can also be used as an AC line receiver which allows the combined AC signal to be isolated from the control circuit. This is useful in preventing any high voltage noise from getting into the control circuit which can cause false signals or corrupt data. This device can also be used in frequency to voltage conversion, providing up to 100KHz conversion range with an accuracy of up to 1%. The EL851 can also be used in capacitive-sensing applications, which involves converting capacitance into a voltage output.

In summary, the EL851 is a photovoltaic output transistor optoisolator which is able to provide electrical isolation between circuits. The EL851 can be used in a variety of applications such as motor control, HVAC, data transmission, AC line receiver, frequency to voltage conversion, and capacitive-sensing. This device is also capable of switching both analog and digital signals. As such, the EL851 is a versatile optoisolator with numerous applications.

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