SI88621EC-IS

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Digital Isolators employ an electrical form of isolation, rather than the opto-coupler variety used in older equipment, offering higher speed data transmission, a larger range of bandwidth, and improved safety compared to opto-couplers. SI88621EC-IS from Silicon Laboratories is a 4-channel digital isolator providing galvanic isolation of 1000Vrms between the input (non-isolated) and output (isolated) sides, for applications operating from a single 3.3V supply. The device supports:

• Isolation of up to 1000Vrms
• Data rates up to 28Mbps
• Integrated power and signal ground
• Low propagation delay (tpd = 600ns)
• ESD protection 5kV minimum for all pins
• Low power consumption (125mW per channel)

The SI88621EC-IS uses Silicon Laboratories\' Silicon-on-Insulator (SOI) technology, which allows the internal circuitry to communicate over a thin layer of supporting layers, while providing electrical isolation from the input side to the output side. The SOI layers are formed by negative channel ion implantation and PECVD technology, and are only 5nm thick, providing excellent isolation in a compact solution. The SI88621EC-IS provides ESD protection on each pin, and is rated for a minimum of 5kV contact discharge. It also has an integrated power and signal ground plane, making the design of the application simpler. The device also consumes very low power, with 125mW per channel.

The working principle of the SI88621EC-IS is based on Silicon Laboratories\' proprietary Digital Isolator technology. A key feature of this technology is the ability to transfer digital signals between the input side and the output side, without a galvanic connection. The data is transferred using capacitive coupling between the silicon substrates that make up the SOI layers. The data is transferred using AC signals, with no electrical connection between the input side and the output side. The AC signals are generated using CMOS technology, allowing the device to operate at high speeds and over a wide operating voltage range.

The SI88621EC-IS can be used in a wide range of applications, such as secure communications, industrial automation, motor control, and medical devices. It can be used to isolate digital signals between two circuits, protecting the output side from electrostatic discharge (ESD) or overvoltage, while preserving signal integrity. It can be used for applications that require compliance with UL, CSA, IEC and EN safety standards. The device is also suitable for applications that need to isolate a high-speed data signal from its power and/or ground inputs.

The SI88621EC-IS Digital Isolator from Silicon Laboratories is a powerful and robust solution for applications that require electrical isolation between the input and output signals. The device provides up to 1000Vrms of galvanic isolation, data rates up to 28Mbps, integrated power and signal ground, ESD protection on all pins, and low power consumption. With its high-speed communication, wide operating voltage range, and small size, the SI88621EC-IS is a versatile solution for a variety of isolation applications.

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