HCPL-0738-000E

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HCPL-0738-000E is an optoisolator, to be more precise, it belongs to the category of logic output optoisolators. It is suggested for applications that need visible isolation between two different circuits, thus protecting these circuits from potential electrical damages. This type of optoisolator is commonly used in various types of isolation, like ground loops, industrial applications, etc.

At its most basics, a logic output optoisolator works by using a light source, such as an infra-red (IR) diode or LED, and a photosensor such as a phototransistor or an optocoupler. It allows the transfer of electrical signals from one circuit to another, but in a totally isolated manner. There is one circuit connected to the LED, which is referred to as the input or driving circuit, and another circuit connected to the phototransistor, referred to as the output or receiving circuit.

The HCPL-0738-000E, in particular, has a very good immunity to Radiated Electromagnetic Interference (RFI) and Electrostatic Discharge (ESD), making it very reliable for many industrial applications. This is mainly due to its thin plastic package and the tolerance to significant voltage changes.

When the input circuit is powered and the LED is powered, it emits an invisible light beam. When the light beam is then received by the output circuit\'s phototransistor, the phototransistor is activated causing an oscillation on the output circuit, thus transferring the electrical signal from the input circuit to the output circuit. This transfer of signals is what is known as optical or electrical isolation.

It also uses current-transfer-ratio (CTR) to measure the amount of current that passes from the driving circuit to the receiving circuit. A higher CTR indicates a better immunity to electrical noise. The HCPL-0738-000E has a CTR of 200%.

The HCPL-0738-000E is mainly used in industrial applications and is especially useful for isolated power supply circuits, analog temperature sensing, switching power supplies, and signal conditioning. It has a very fast response time and can be used for high-speed data transfer.

The HCPL-0738-000E provides excellent solutions for coupling high-voltage or high-frequency in harsh environments, for example, controlling switching power supplies, eliminating ground-loop problems, and protecting sensitive electronic circuits from electrical noise and interruption. It is also ideal for a variety of other applications, such as establishing a secure connection between multiple systems, setting up a secure connection between isolated systems, and providing isolated signal conditioning.

In summary, the HCPL-0738-000E is an optoisolator belonging to the category of logic output optoisolators. It provides excellent noise immunity and can withstand very high voltage, making it very reliable for many industrial applications. It uses CTR to transfer electrical signals from one circuit to another, offering an efficient and secure connection between these two circuits.

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