ISO7721FD

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Digital Isolators are an important category of electronic integrators used to provide optical separation between two distinct circuits. The ISO7721FD is an advanced digital isolator based on CMOS technology, which combines the advantages of high-speed data communication and low power consumption. In this article, we will look at the application field of ISO7721FD and its working principle.

Application field

The ISO7721FD is a CMOS-based logic gate, which implies its interface to digital and analog circuits. This makes it suitable for use in a variety of applications. Firstly, it can be used for digital signal isolation between two devices, which allows data to be passed through these two circuits with no electrical connection. Secondly, because of its high-speed response time, it can be utilized for serial control and communication. It is highly suitable for use in industrial automation, automotive infotainment system, medical equipment, and other industrial applications.

The device also enables secure communication such as encryption and decryption of data for data protection and tamper detection. It can be used to interface remote sensors and actuators between two autonomous systems, such as between two building automation networks. This device also supports galvanic isolation for the reliable and secure transfer of information over long distances. It ensures signal integrity and is also suitable for point-to-point connections for applications such as frequency conversion.

Working Principle

The ISO7721FD digital isolator uses two silicon dies, one to receive incoming signals and the other to transmit the signals out. The transmission die is connected to the receiving die using a magnetic field, which is isolated from the electric field. The two dies output a digital signal in the form of a pulse, and the whole process is known as pulse-coupled logic, allowing the signals to be transmitted in both directions.

The way the ISO7721FD works is that it receives an incoming signal on one side of the device, which is then passed through the magnetic coupling field to the receiving die. This die then encodes the signal into a digital signal and outputs it on the other side of the device. The device can also be used for data encoding and encoding, subject to a maximum bit rate of 5Mb/s.

The ISO7721FD digital isolator also has various safety features built-in. It offers fault protection, ESD protection and latch-up protection, to ensure reliable operation in extreme environments. It has a wide operating temperature range and can withstand high shock and vibration levels when used in automotive or other industrial applications.

In conclusion, the ISO7721FD digital isolator is an advanced device that enables fast and secure data transmission and connection between two different circuits or systems. It has a wide range of applications and features excellent performance in long-distance data transmission. The isolator’s safety features ensure that it offers reliable and secure operation in extreme environments.

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