ADUM3401ARWZ-RL

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Digital isolators are devices that keep electrical circuits insulated from one another. ADUM3401ARWZ-RL is a type of digital isolator that is widely used in various applications. This article discusses the application field and working principle of ADUM3401ARWZ-RL.

Application Field

The ADUM3401ARWZ-RL is a single channel, integrated digital isolator designed for high speed data transmission. It provides reliable isolation up to 4,000 VDC, defending against electrostatic discharge, power surges, and other electrical issues. The ADUM3401ARWZ-RL provides digital isolation in a wide variety of applications, including medical instruments, test and measurement equipment, industrial control and automation systems, communications systems, and other electronic interfacing applications. It is also ideal for communication systems utilizing protocols such as USB, CAN, I2C, and RS-485.

Working Principle

ADUM3401ARWZ-RL is based on the physical phenomenon of capacitive coupling. It consists of two isolated sections, each of which utilizes its own CMOS driver and receiver. The input of the driver section is connected to the output of the receiver section through a capacitive coupling, creating a virtual coupler. The digital input of the driver section is connected to the digital output of the receiver section through a path of low impedance. The digital signal is thus transferred between the two sections, while maintaining electrical isolation between the two.

The ADUM3401ARWZ-RL also features a propagation delay of approximately 20 ns and a rise/fall time of approximately 30 ns. This results in improved signal integrity and reduced power dissipation. Additionally, the device provides a typical signal-to-noise margin of 15 dB at 16 Mbps and between 0 and –3 dB at 32 Mbps. This wide signal-to-noise margin ensures reliable data communication even in noisy environments.

ADUM3401ARWZ-RL also features short circuit protection, under-voltage lockout, and robust output driver performance. This ensures that the device will operate reliably in high-voltage and high-noise environments. Additionally, the device is rated for temperatures between –40ºC and +125ºC, making it suitable for a wide range of applications.

Conclusion

The ADUM3401ARWZ-RL is a single-channel, integrated, digital isolator, designed for high speed data transmission. It is suitable for a wide range of applications, such as medical instruments, test and measurement equipment, industrial control and automation systems, and communications systems. The device is based on the physical phenomenon of capacitive coupling and provides a typical signal-to-noise margin of 15 dB at 16 Mbps, ensuring reliable data communication even in noisy environments. Additionally, the ADUM3401ARWZ-RL features short circuit protection, under-voltage lockout, and robust output driver performance, making it suitable for high-voltage and high-noise environments.

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