H11AA814ASD

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Optoisolators - Transistor, Photovoltaic Output - are designed to provide electrical isolation between two circuits while allowing them to communicate via an optical link. The H11AA814ASD is a quad optoisolator device containing two LED-TFT driver channels and two photo-voltaic receiver channels all isolated from each other. Their main purpose is to convert signals between two circuits that are physically isolated from each other, while using a light source for transmission.

A typical application for the H11AA814ASD is whenever an isolation barrier is necessary between two signal circuits. This may occur when controlling higher voltages, grounding issues, or in the presence of high levels of noise. It also contributes to ensure reliability of the system while mitigating cross-interference problems. As a result, safety on systems is increased.

The transmitter of the H11AA814ASD is an LED-TFT driver in each channel, which emits a modulated light when a control signal is applied to its input. The light is then coupled to the receiver, which can have either a photo-diode, a photo-transistor or a photo-SCR device for further signal transmission. The device is usually designed as a 6-pin surface mount package in order to provide the physical isolation between two circuits.

The working principle of the H11AA814ASD can be illustrated as follows. An electrical signal is applied to the LED-TFT driver channel and current pulses are generated, which modulates the intensity of the light that is then emitted. The emitted light is then optically coupled to the photo-voltaic receiver, converting the light signal into an electric current. This current is then amplified and converted into a signal of the desired level and magnitude. The signal then passes through the optoisolator barrier and is brought back to its original level.

The H11AA814ASD optoisolator is known for its low-voltage capability, high noise immunity, and low-power consumption. It is widely used in motor control, power system control, security systems, telecommunication, industrial automation, and consumer electronics applications.

In conclusion, the H11AA814ASD optoisolator is a versatile device that is used to provide electrical isolation between two circuits while allowing them to communicate via an optical link. It is relatively simple to use, high-reliable, and great for applications in many different fields.

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