SI8622EB-B-IS

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Digital Isolators are designed to protect sensitive circuits while providing high degree of electrical isolation and are defined to include both opto-couplers and capacitively coupled integrated circuits. They are used widely in all parts of the power and aerospace electronics, medical diagnostics and communications equipment. This paper is going to discuss on the SI8622EB-B-IS application field and working principle which is one of the digital isolators.

The Application Field of the SI8622EB-B-IS

The operation of the SI8622EB-B-IS can meet the requirements of the Communications Network Interface Standard, GNSS Interface Standard, AN/EN 9100:2016 Quality Management Standard and IEC 61162-460 requirements. The application areas of the SI8622EB-B-IS include aerospace, industrial, automotive, medical, and communications equipment. The SI8622EB-B-IS is used as a long-distance isolation between circuits that may be subjected to high voltage instances, EMI/RFI, or in general, hazardous environments. It is suitable for design of high-reliability digital-video interface, industrial communication systems, automotive digital network, electromechanical medical equipment, GNSS/IoT applications, temperature control systems, digital equipment, automated production lines, etc.

The Working Principle of the SI8622EB-B-IS

The SI8622EB-B-IS digital isolator works as a signal isolator. It is designed with two integrated isolated Gainclones: one is the input Gainclone, while the other acts as the output Gainclone. The way it works is similar to an opto-coupler in that it uses light for signal transmission. When the input signal is applied to the input Gainclone, the LED driver in the Gainclone is activated and the light signal is transmitted from the LED driver to the photosensor of the output Gainclone via fiber optic cable. The photosensor converts the light signal to an equivalent electrical output signal and provides isolation between the two circuits. This isolation feature helps to prevent interference from one circuit to the other and also helps protect the circuits from high voltages.

The SI8622EB-B-IS has a wide operating temperature range of -40°C to +85°C and can provide isolation up to 3kV. It also features operational power consumption of 18mW, Dielectric Withstanding Voltage of 10kV per isolation barrier and a high noise immunity of 30kV/Ω. It can handle high currents up to 1A with a low voltage drop across the isolation boundary.

The SI8622EB-B-IS uses a signal-conditioning technology called Differential-to-Digital Conversion (DDC) which converts signals from analog to digital and back again. The technology is able to reduce noise in the signal, improve the signal quality, and also provide isolation between two different circuits. This significantly improves the signal processing capability and efficiency while providing reliable signal isolation, thus allowing the use of a single unit to perform multiple tasks.

In summary, the SI8622EB-B-IS digital isolator offers a variety of features making it suitable for a wide range of applications, such as industrial automation and control, automotive, medical, and communications applications. The device is designed to provide reliable and efficient signal isolation with low power consumption, wide temperature range, and high noise immunity and can handle high currents with low voltage drops across the isolation barrier.

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