HCPL3700SV

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Optoisolators are devices used to isolate one circuit from another, by passing signals through a light-emitting diode (LED) and a photoreceptor-based device. The HCPL3700SV is a photovoltaic output transistor, designed to provide electrical isolation between a low or high voltage digital logic circuit and a small signal analog circuit. In this article, we will discuss the application field and working principle of the HCPL3700SV.

Application Field

The HCPL3700SV is ideal for applications where electrical isolation is critical, such as medical and industrial control systems, automation and semiconductor test and measurement systems, aerospace and military systems, and process control systems. The HCPL3700SV is available in a small surface mount package with high ESD rating, making it suitable for use in dense circuit boards. The wide operating temperature range makes it suitable for applications in extreme temperatures.

Working Principle

The HCPL3700SV optoisolator consists of a gallium arsenide infrared emitting diode (LED) optically coupled to a transistor on a monolithic chip. The LED light is detected by a photo-transistor, providing a high degree of insulation between input and output. The high voltage rating of the HCPL3700SV enables a wide range of inputs and outputs. The optoisolator has a low current drive rating, making it suitable for high speed applications.

The HCPL3700SV has a maximum collector-emitter voltage of 50V and a maximum collector-base voltage of 80V. The device has a breakdown voltage of 80V, which is ideal for AC line-powered and other high voltage applications. The device has an on-state collector current of 24mA, making it suitable for applications requiring a high output current. The fast switching speed of the HCPL3700SV makes it ideal for applications where a fast response time is required.

The device has a maximum turn on time of 3.5µs and a maximum turn off time of 5µs, making it suitable for applications where a fast response time is required. The device has a low output noise of 1.5µVrms and a low input capacitance of 0.5pF, making it suitable for low noise and low capacitance applications. The HCPL3700SV has a low power dissipation of 8mW allowing longer battery life in portable devices.

The HCPL3700SV is a reliable and versatile optoisolator when used in applications requiring isolation, high voltage isolation, fast switching speed and low noise. The device has a wide operating temperature range and a wide power supply voltage range, making it suitable for use in a variety of applications. The HCPL3700SV is an ideal choice for applications requiring electrical insulation, high voltage isolation, fast switching speed and low noise.

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