Common Mode Transient Immunity (Min):	35kV/µs
Supplier Device Package:	8-DIP Gull Wing
Package / Case:	8-SMD, Gull Wing
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Voltage - Supply:	2.5 V ~ 5.5 V
Rise / Fall Time (Typ):	2.5ns, 2.5ns
Pulse Width Distortion (Max):	25ns
Propagation Delay tpLH / tpHL (Max):	50ns, 50ns
Data Rate:	15Mbps
Series:	Automotive, AEC-Q100
Voltage - Isolation:	3750Vrms
Channel Type:	Unidirectional
Inputs - Side 1/Side 2:	1/0
Number of Channels:	1
Isolated Power:	No
Type:	General Purpose
Technology:	Capacitive Coupling
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Digital Isolators: SI8720BC-A-IPR Application Field and Working Principle

Digital Isolators are isolated modules that provide secure electrical separation between two different electrical circuits. These modules are typically used to provide an extra level of protection against transient electrical signals and noise, and are particularly useful in industrial applications that need to minimize electrical interference. The SI8720BC-A-IPC is a type of digital isolator that has a wide range of applications in areas such as automotive, medical, industrial automation, and communication systems.

Application Field

The SI8720BC-A-IPR digital isolator is an isolated RS-485 transceiver that provides isolation of up to 5kV rms for 30 seconds surge. It features a wide common-mode voltage range of up to 25V, making it suitable for applications in harsh environments. Its wide bandwidth of up to 10 Mbps/3 Mbps over twisted-pair (RJ45 and CAT 5 wiring) or single-ended (2 to 4 pair wiring) lines makes it a great choice for applications that require fast data communication. Some of the applications it can be used for include industrial automation, medical equipment, communication systems, measurement and test systems, and data acquisition systems.

Working Principle

The SI8720BC-A-IPR uses digital signal transmission technology to provide electrical isolation between two separate systems. It operates by receiving input signals on a non isolated side, and then internally converting them into digital signals before passing them to its isolated side. It then converts these digital signals back to their analog form and passes them to their destination.The input signals received by the SI8720BC-A-IPR are first converted into more stable and reliable digital signals by the built-in transimpedance amplifier. This ensures that any noise, interference, or electrical transients that may be present on the input signals are filtered out. The digital signals are then passed to the isolator side, where they are further filtered and converted back to their original analog form before being passed to the output.The SI8720BC-A-IPR digital isolator also offers high immunity to electrical noise and interference, thanks to its low capacitance optocoupler. This ensures that the signals transmitted over isolated lines remain free of interference and transient signals. The device is also designed to protect itself from electrostatic discharge (ESD) damage, further increasing its reliability in industrial applications.

Conclusion

The SI8720BC-A-IPR digital isolator is a versatile and reliable device that offers protection for sensitive electrical systems. Its wide common-mode voltage range, high immunity to electrical noise and interference, and ESD protection make it an ideal choice for demanding industrial applications. Its ability to transmit digital signals over isolated lines also makes it perfect for fast and reliable data communication over long distances. Lastly, its wide bandwidth and ability to provide up to 5kV rms for 30 seconds surge makes it the perfect device for any application that needs high electrical isolation and data protection.

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