SI8462AA-A-IS1R

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Digital isolators are widely used in many industrial applications due to their ability to provide signal isolation between two circuits while maintaining a consistent signal quality. Digital isolators facilitate the transfer of digital signals without fear of distortion or interference caused by high voltage fluctuations, insulation fault currents, voltage transients, or other external noise.

The SI8462AA-A-IS1R is a digital isolator from Silicon Laboratories. It is designed for applications demanding both high speed and high isolation performance, such as medical systems, industrial automation, power supplies, and automotive applications. This isolator provides high-speed continuous data-bidirectional communication with robust isolation up to 10 kV/μs.

The SI8462AA-A-IS1R is a dual-channel device, featuring an integrated driver and receiver in each channel. The device is designed to support data transmission rates of up to 5 Mbps. The digital isolator is also equipped with integrated 65 mA CMOS output buffers that can produce the 6-bit digital codes required for high-speed transmission.

The SI8462AA-A-IS1R also features an exclusive “fail-safe” feature that allows it to keep the output state unchanged during no power or a fault condition, thereby protecting the load. In addition, the device provides protection against ESD, EFT, and surge transients.

The working principle of the SI8462AA-A-IS1R is based on a core feature known as transformer-based isolation. In this configuration, the adjacent channels are isolated from each other by a high-frequency transformer. The transformer contains two coils, which couple with each other through their magnetic fields. The signal is transferred between the coils without direct physical connection, relying on the mutual inductance between them for signal transfer.

The signal is first converted to a high-frequency signal by the driver and then transmitted across the transformer coils. This high-frequency signal is then received by the receiver and converted back to the original data stream. The transformer’s high-frequency design provides effective signal isolation (up to 10 kV/μs) while also maintaining a low propagation delay.

The SI8462AA-A-IS1R is well-suited for applications in which reliable communication between two electronically isolated circuits is required. These applications include industrial automation, telecommunications, and medical systems. This digital isolator is also appropriate for applications in which a significant amount of noise is generated, such as automotive electronics, motors, and power supplies.

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