AD261AND-3

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Digital isolators provide an isolation barrier between two circuits or two pieces of equipment. They are used to protect circuits from interference and eliminate potential ground loops, and are commonly used in industrial and medical applications. The AD261AND-3 is a high performance digital isolator with an enhanced product performance and a 3-channel digital isolation circuit. Its features include high dielectric strength, high noise immunity, wide common mode transient immunity and guaranteed data retention.

Application Field

The application field of the AD261AND-3 digital isolator is diverse, making it an excellent choice for a variety of applications. It is suitable for industrial distributed control systems, industrial process control systems, power systems, medical systems, instrumentation, motor control systems, telecommunications, motor control systems, avionics systems, and monitoring systems. It works with a variety of system sensors, controllers and actuators to help ensure reliability and safety in these systems.

Working Principle

Digital isolators use opto-isolation to transfer digital signals with low signal power, elimination the risk of ground interference or signal interference between the two circuits. The AD261AND-3 isolator contains high-speed CMOS and opto-isolators, which offer fast switching and low propagation delay. It also uses a high frequency switching photodetector to minimize signal noise and reduce power consumption. Additionally, it employs high-voltage CMOS and opto-isolator technology to provide transmission of signals up to 16 Mbps.

The AD261AND-3 digital isolator works by isolating the source circuit from the destination circuit. In operation, the source circuit sends a signal to the opto-coupler, which creates an electrical pulse which is then sent to the destination circuit. This pulse provides a definite “ON” or “OFF” state, depending on the signal strength, and is used to turn the destination circuit on or off. The AD261AND-3 isolator also features a logic inverter to enable two different outputs from the source circuit to be sent to the destination circuit.

The AD261AND-3 digital isolator also features a pre-voltage circuit which helps to reduce the switching time. It features an internal regulator and ESD protection which provides good reliability and signal integrity even when exposed to noise and interference. The integrated overvoltage protection eliminates the risk of damage due to static electricity or power surge. The symmetrical common mode transient immunity is also excellent, making it suitable for location and applications that are subject to these conditions.

In summary, the AD261AND-3 digital isolator is an excellent choice for industrial and medical applications due to its high isolation voltage, wide common mode transient immunity, and low power consumption. With its pre-voltage circuit, high-speed switching, and precise logic control, this digital isolator offers excellent performance in a variety of applications.

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