VO207AT Isolators

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Optoisolators - Transistor, Photovoltaic Output

VO207AT Application Field and Working Principle

The VO207AT optoisolator, developed by Vishay Semiconductor, provides an effective isolation from a high-voltage, noisy environment to control low-voltage, sensitive circuitry. It combines an infrared LED and a photo transistor placed in an IC package to provide a functional frequency range between 3 Hz to 1 MHz. It delivers 2500 Vrms of CM isolation, making it suitable for medical applications and processes that rely on controlling sensitive optical electronics.

Application Field for VO207AT

The VO207AT optoisolator is widely used in the medical application field such as infusion pumps, patient monitors, and stethoscopes. Its small size and low voltage requirements make it ideal for medical devices that require effective isolation. Other potential applications include process control, telecom systems, and industrial machinery. Additionally, its wide frequency range makes it a viable option for multi-application deployments in industrial and consumer electronics.

Working Principle

The VO207AT optoisolator consists of two parts – the LED and the photo transistor. The LED emits light when driven by a low voltage signal. The light is then received by the photo transistor, which triggers its switching action to provide a direct logic output. The two components are connected together in an IC package, with the LED and the photo transistor separated by an isolation gap. This isolates the output signal and prevents it from being affected by any noise in the environment.

The VO207AT’s low voltage requirements make it an ideal choice for monitoring and controlling applications where the input is coming from a low voltage source, such as a USB device. The optoisolator is also highly reliable and efficient, with a minimum current requirement of only 5 mA and an on-resistance of only 0.5 Ω.

Conclusion

The VO207AT from Vishay Semiconductor is an effective optoisolator for sensitive optical electronics. It is capable of providing 2500 Vrms of isolation from the high-voltage, noisy environment and features a wide frequency range of between 3 Hz to 1 MHz. The combination of a LED and a photo transistor in an IC package make it suitable for medical applications and controlling of industrial equipment. With its small size and low voltage requirements, it is also suitable for use in consumer electronics applications.

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