SI8440AB-D-ISR

Digital isolators are commonly used to increase signal safety in industrial systems, especially when biasing signals from ground. The SI8440AB-D-ISR from Silicon Laboratories is a digital isolator which features a high-speed communication interface, low power consumption, reliable operation, and a significant reduction in the time and effort needed to transmit signals. This article will examine the application field and working principle of the SI8440AB-D-ISR.

Application Field

The SI8440AB-D-ISR is designed for applications that require a high-speed communication interface and low power consumption. It is commonly used in systems with multiple domains such as automotive, industrial, and medical. In these systems, the SI8440AB-D-ISR isolates circuits and facilitates the transmission of signals safely and quickly. Additionally, the high-level safety features of the SI8440AB-D-ISR, including isolated inputs, galvanic isolation backup, backup power supply, and common-mode power limiting, make it a valuable choice for applications in which signal safety is essential.

Working Principle

The SI8440AB-D-ISR isolator works by transmitting signals without direct contact between two isolated circuits, utilizing a variety of technologies to reduce the risk of signal transmission failure. At its core, the SI8440AB-D-ISR is a transformer-based digital isolator which utilizes a high-speed communication protocol called Time Domain Isolation (TDI). The TDI protocol is a form of differential signaling which exchanges data bits between the primary and secondary sides of the isolator with an extremely low power consumption level of less than 1mW. The SI8440AB-D-ISR also utilizes an innovative architecture which includes several layers of galvanic isolation to protect the integrated circuits from electrostatic discharge (ESD). Additionally, the SI8440AB-D-ISR is designed to provide an enhanced level of protection to systems from high-voltage surges.

Conclusion

The SI8440AB-D-ISR digital isolator from Silicon Laboratories is an excellent choice for applications that require high-level signal safety and high-speed communication. Its low power consumption and reliable operations make it an ideal fit for systems with multiple domains such as automotive, industrial, and medical. Additionally, the built-in protection features of the SI8440AB-D-ISR make it an excellent choice for applications in which security is critical.