ISO7421AQDRQ1 Isolators

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Digital Isolators provide the isolation necessary to operate circuits safely and correctly in the face of the most severe environmental elements and/ or under the most hazardous conditions. This is achieved by separating two circuit components or sections, while allowing them to interact, thus providing the safety needed for even the most sensitive of circuits.

One example of digital isolators available is the ISO7421AQDRQ1. The ISO7421AQDRQ1 is an isolator specifically designed for the 24 VDC industrial electronics market. It is a 6 A wide range, isolated interface optimized with an innovative patented design.

The ISO7421AQDRQ1 isolator offers high-speed, reliable performance along with wide-inrush current handling and reverse polarity protection features. The device includes both galvanic isolation and surge protection for improved EMI/RFI performance.

The application fields of ISO7421AQDRQ1 are in industrial automation systems, especially in factory automation, traffic control, and medical equipment, where the safety of processes and digitized signals must be ensured.

The working principle of the ISO7421AQDRQ1 can be explained by describing its components. The isolator includes two sides, each consisting of a pair of opto-couplers operating in tandem. Each isolator side consists of a LED and a photoreceptor, along with a driver IC. When the LED is energized, it creates light which is then picked up by the photoreceptor and converted into an electrical signal. This electrical signal is then passed through the driver IC, which in turn drives the opto-coupler and isolates one side from the other.

The driver IC is also responsible for regulating the strength of the LED, thus allowing for a robust and reliable signal transmission between different circuits and components. With this, the ISO7421AQDRQ1 provides data and signal isolation in a variety of applications.

In addition to its robust performance, the ISO7421AQDRQ1 also offers improved EMI/RFI suppression due to its high isolation resistance. It can operate from a wide DC input voltage range and supports both push-pull and open collector outpulses. It also features current limiting and over-temperature protection.

To sum up, the ISO7421AQDRQ1 is a digital isolator designed for 24VDC industrial electronics markets. With its advanced features, including a highly reliable and robust signal transmission, improved data and signal isolation, wide input voltage range, and surge protection, the ISO7421AQDRQ1 is an ideal solution for a variety of factory automation, traffic control, and medical equipment applications.

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