ST490ACN

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The ST490ACN is a high-performance isolated RS485 transceiver that is designed to help improve system robustness by providing more protection than non-isolated solutions. It is suitable for both Full-Duplex and Half-Duplex applications, and its common-mode transient immunity and overvoltage protection ensure reliable communication in noisy environments.

Application field

The ST490ACN transceiver is ideal for applications requiring ESD, EFT, and Surge Protection in industrial, factory automation, and power line communication systems. It is also suitable for long distance point-to-point and multi-drop RS485 bus communication. The ST490ACN transceiver provides 15KV ESD protection for all lines, 5KV EFT protection for the data line, and 600W surge protection for 50 and 75ohm lines.

The transceiver comes in a 16-pin SOP package and can operate over a wide temperature range of -40°C to 85°C. It is UL certified, CE certified, and RoHS compliant, making it suitable for use in harsh environments. It also features 0.6μs maximum delay, 1A TX output short-circuit current, and an integrated voltage regulator.

Working Principle

The working principle of the ST490ACN transceiver is based on the core isolation technology. The isolation between high and low barriers is provided by a high-efficiency transformer coupled with a galvanic barrier. This technique helps protect against common-mode transients that are typical in industrial applications.

The transceiver also includes a driver and receiver, which helps in reliable communication over long distances and in noisy industrial environments. The driver provides up to 1A current, while the receiver features a low standby power consumption that helps prolong device life and reduce power costs. In addition, it has a fast data transmission rate of up to 1Mb/s, which ensures that large data is transmitted quickly and reliably.

The ST490ACN transceiver has been designed to meet various industry standards, including IEC 61158, ISO 11898-2, UL 60950-1, UL 1598, and CSA C22.2. This ensures that the device meets the safety requirements for its specific application.

Conclusion

The ST490ACN transceiver is an excellent choice for applications that require reliable transmission of data over long distances. It offers excellent performance in industrial, factory automation, and power line communication systems by providing ESD, EFT, and Surge Protection. Furthermore, its integrated voltage regulator helps improve system robustness, while its fast data transmission rate ensures reliable communication in noisy environments.

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