SI8651BC-B-IS1R

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Digital Isolators have been around for many decades and the technology has evolved and grown rapidly to fit the needs of the users in different fields. SI8651BC-B-IS1R is one of the latest products in this domain, providing a highly integrated and space-saving design. This product combines safety and isolation with very low power dissipation. In this article, we discuss the application field and the working principle of the SI8651BC-B-IS1R.

The SI8651BC-B-IS1R is an opto-coupler with built-in current regulation. It provides isolation between two communication ports, protecting the receiver from high-voltage surges and transients. It can be used in any system that requires electrical isolation, such as medical equipment, industrial control systems, and automotive applications. It is especially suitable for use in applications where high-speed data rates and/or precision isolation are required.

The SI8651BC-B-IS1R has two halves, the driver side and the receiver side. The driver side has two transistors connected in parallel, a switchable open collector and a driving transistor. The receiver side has two transistors connected in series with a matched linear voltage regulator. When the input signal is applied to the driver side, it is amplified and applied to the matched linear voltage regulator on the receiver side.

The SI8651BC-B-IS1R achieves isolation by using several proprietary techniques for protecting the input signal from the high voltage surges that can occur. These include optical isolation, galvanic isolation, active protection, and surge protection.

Optical isolation uses a light source and a light-sensitive diode to produce an electrical pulse. The pulses are then amplified and applied to the receiver side through the matched linear voltage regulator. Galvanic isolation uses an electromagnetic field to isolate the input signal from the ground and provide a safe and reliable signal transfer. Active protection monitors the bandwidth of the input signal and modifies the output signal to prevent high-frequency signals from reaching the remote device. Surge protection is used to protect the receiver from high voltage surges, and can be adjusted for any environment.

The SI8651BC-B-IS1R is also designed to meet most international standards for electrical isolation, such as IEC 61010, UL, and CSA. It has been tested for surge capability up to 10kV and for transient performance at up to 6kHz. In addition, it offers immunity to EMI/RFI, enabling high-speed communication while providing superior EMC and EMI/RFI noise immunity.

In conclusion, the SI8651BC-B-IS1R provides a highly integrated and space-saving design to provide electrical isolation in any system where high-speed data rates and/or precision isolation are required. It offers excellent isolation, high-speed data rates, and EMI/RFI noise immunity. With its various protection methods, it is perfectly suited for industrial control systems, medical equipment, automotive applications, and other systems where high-quality isolation is required.

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