SI88442EC-IS

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Digital isolators allow the electrical or optical isolation of two different electronic circuits while allowing the exchange of data. The SI88442EC-IS is a digital isolator designed for industrial automation, allowing standard industrial interfaces to be electrically isolated to protect against electro-magnetic interference (EMI) and transient voltage pulses. By using capacitive coupling technology, the SI88442EC-IS provides 5 kVrms of isolation between circuits, making it suitable for medium- and high-voltage applications.

The SI88442EC-IS is a single-channel digital isolator, operating at a maximum data rate of 50 Mbps. It supports a wide range of industrial bus systems, including the popular IO-Link, HART, CAN, and Ethernet protocols. It also features 7kV surge protection and low power consumption, making it suitable for battery-powered equipment. The isolator is available in industrial standard 3x3mm and 4x4mm packages, allowing for space-constrained applications.

The SI88442EC-IS can be used for various applications. In industrial automation, it can be used to electrically isolate the communication interface from the main control board, preventing noise and interference from impacting signal integrity. This can also protect equipment in the event of a high voltage pulse on the field side, while still allowing the equipment to be controlled remotely. In motor control systems, the SI88442EC-IS can be used to reduce electromagnetic interference (EMI) between the motor controller and the motor drive, eliminating the need for bulky external EMI filters.

The SI88442EC-IS operates on the principle of isolated capacitive coupling. The capacitance of the isolator is modulated using a high-frequency carrier signal, and the changes are monitored by a precision analog-to-digital converter. The data is then sent across the isolator’s electrical barrier, enabling communication between the two circuits with no physical connection. As the data is transmitted across the isolator, the signal is converted to a digital form, allowing for faster transmission and greater reliability.

The SI88442EC-IS is a versatile digital isolator designed to operate reliably in harsh industrial environments. Its wide range of features and low power consumption make it suitable for a variety of applications, making it a popular choice for engineers seeking a reliable solution for industrial automation and motor control systems.

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