SI8431-C-IS

Common Mode Transient Immunity (Min):	25kV/µs
Supplier Device Package:	16-SOIC
Package / Case:	16-SOIC (0.295", 7.50mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Voltage - Supply:	2.375 V ~ 5.5 V
Rise / Fall Time (Typ):	2ns, 2ns
Pulse Width Distortion (Max):	3ns
Propagation Delay tpLH / tpHL (Max):	9.5ns, 9.5ns
Data Rate:	150Mbps
Series:	--
Voltage - Isolation:	2500Vrms
Channel Type:	Unidirectional
Inputs - Side 1/Side 2:	2/1
Number of Channels:	3
Isolated Power:	No
Type:	General Purpose
Technology:	Capacitive Coupling
Part Status:	Obsolete
Packaging:	Tube

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Introduction

Digital isolators are electronic components used to protect digital signals and electrical equipment from damage due to electrostatic discharge (ESD) or electromagnetic interference (EMI). SI8431-C-IS is a digital isolator that is particularly suited to applications that require high speed and isolation performance. This isolator can be used to isolate two circuits that are at different potentials, or it can be used to separate two last stages of a signal chain that operate at different operating levels.

Key Features

SI8431-C-IS has many important features that make it a suitable choice for digital isolator applications. It has an isolation voltage rating of 3000Vrms, and can withstand a surge voltage of 6000V. It has a low output current level of 10mA, and low power consumption. It also has a low differential nonlinearity of 0.2%, as well as low crosstalk between channels of 0.4dB. Finally, it is compact in size, measuring only 7.2 x 6.3 x 2.5 mm.

Application Fields

SI8431-C-IS is highly suitable for applications that require a high performance digital isolator. Examples of such applications include precision analog circuits, such as medical devices, instrumentation, or motor drives. Other applications include industrial automation, automotive and consumer electronics, and telecom, where data integrity and signal integrity are paramount.

Working Principle

SI8431-C-IS works on a principle of optical coupling, which is a type of digital isolator. The isolator uses an optical link to transmit data signals between two isolated circuits while separating the high voltage from the low voltage. The signal is converted from electrical to optical by an LED, amplified, and then converted back to electrical by a photodiode. The electrical signals are then passed through an optical isolation barrier between the input and output sides, blocking any high voltage signal from propagating through to the other side.

Conclusion

SI8431-C-IS is an excellent choice for applications that require a high performance digital isolator. It offers excellent features and reliable protection from ESD or EMI events, as well as low power consumption. It can be used in a wide variety of applications, and its compact size makes it ideal for many types of installation.

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