VOS618AT Isolators

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Optoisolators are electric devices that use light in order to isolate circuits from one another. The VOS618AT is an optoisolator that employs a transistor with a photovoltaic output. This type of optoisolator is especially useful in applications that necessitate electrical isolation such as industrial applications, measuring and controlling devices, and computer and electronic systems.

The VOS618AT consists of an infrared emitting diode (IRED) and an NPN silicon photovoltaic transistor output. When the transistor base is driven by a logic collector current, the IRED emits a light and light-generated carriers are collected by the photon detector to generate a base drive voltage.

The main feature of the VOS618AT is its high-level isolation voltage of 1500V rms, which is used to isolate circuits without the risk of electric shock or electrical noise. This optoisolator also has a wide operating temperature range of -40°C to +100°C, making it suitable for various industrial applications. It also has a fast switching speed of 2 us and a low propagation delay time of 10 us. Additionally, the VOS618AT has an exceptionally high photodiode voltage of 2.5V, ensuring high performance and reliability.

The VOS618AT is used for both logic level and current level isolation. It is particularly useful for high-speed transmission of signals between synchronous systems. It can be used in both TTL and 5V/cm logic systems, and can be interfaced with analogue circuits for isolation of the analogue signals. The high isolation voltage of 1500V allows this optoisolator to be used in safety-critical systems and ensure safety of the user.

The working principle of the VOS618AT is based on the photovoltaic effect. When light from the IRED is incident on the photodiode, the photodiode produces an electric voltage which in turn drives the base of the output transistor. This increases the collector current of the transistor which is proportional to the intensity of the light. The output current can be then used to drive a logic input or an analog voltage.

The VOS618AT optoisolator can be used in a variety of applications due to its wide operating temperature range, extremely high isolation voltage, fast switching speed, low propagation delay time, and high photodiode voltage. Such applications include automotive, industrial, medical, consumer, computer and electronic systems, and many more. It is also widely used in noise interference and surge rejection applications.

In conclusion, the VOS618AT is an optoisolator with a transistor and a photovoltaic output. It is used for both logic level and current level isolation, and has a wide operating temperature range, a high isolation voltage, a fast switching speed, a low propagation delay time, and a high photodiode voltage. It is suitable for a variety of applications such as automotive, industrial, medical, consumer, computer and electronic systems. It can be used for noise interference and surge rejection applications, as well.

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