AD260AND-3

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Digital isolators are electrical components used in electronic circuits to transfer signals between circuits while preserving and protecting signals against dangerous voltage and current levels. Isolators are used in industrial electronics, computer systems, and communications systems. They help to reduce the risk of power failure, maintenance costs, and damaged or lost data.The AD260AND-3 is a digital isolator from Analog Devices Inc. It is a 4-channel galvanic isolator that operates at speed from 330 kbps to 2 Mbps and consumes only 350 μA of supply current. It is an ideal choice for applications where low power consumption and high isolation are essential.The AD260AND-3 is designed to provide forward error correction (FEC) of up to 30 dB and greater than 1.7 megabits per second of output data rate. It features a ±3 dB differential input and output range. Additionally, the isolator can detect the presence of a signal on the input and can handle both AC and DC level information.The AD260AND-3 is mainly used in data acquisition and control applications, as well as for serial port interfacing. In data acquisition and control applications, the isolator is used to safely transfer data signals between two devices without creating ground loops or noise. This makes it particularly useful for monitoring and controlling signals over extended distances. In addition, the isolator has low ON resistance and is designed to provide low power dissipation and faster rise/fall times for improved data signal fidelity.The working principle of the AD260AND-3 is based on a transformer-based signal transfer. This isolator contains a low-voltage transformer with a feedback circuit that passes data signals without distortion. When a signal enters the device’s input, it is detected by two signal detection circuits, one of which provides the input signal voltage level. This voltage level is then transformed by the transformer and is amplified and buffered to drive the coincidently connected two-transistor switch at the device’s output. This switch is then operated by the transformer via a two-transistor switch to further amplify and buffer the signal in order to transfer it to the output.In conclusion, the AD260AND-3 digital isolator is a powerful device for electrical signal isolation and is designed for low-power applications, including data acquisition and control applications. Its embedded transformer-based design, forward error correction, and wide input and output range make it an ideal choice for electro-mechanical control systems where safety and reliability are essential.

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