ISO7420ED

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Digital isolators, among the various types of isolators, are the most versatile and prevalent. They are widely used in a wide range of applications, ranging from high-speed data transfer, analog signal isolation, motor control, power supply isolation, medical equipment, home appliance and industrial control. Their usage is often determined by their application field and their working principles.

In terms of application fields, digital isolators are often used in high-speed data transmission, such as for industrial networks, for example, CAN, CAN FD, USB, Ethernet etc. Isolators can protect the integrity of signal transmission while isolating the transceivers and sensors from potential field noise and power supply fluctuations. For example, a digital isolator package is an ideal choice for protecting sensitive subsystem components from interference in the automotive, aviation, medical, industrial and railway industries.

Digital isolators also have many features that make them attractive to many designers. One of the key features is their fast speed -- they can provide isolation up to 6.5 Gbps. They also provide a very low transmission delay, which is useful in critical timing-sensitive applications. They also offer other significant features such as low-power consumption, which can reduce total system power consumption. Moreover, they are highly reliable and highly immune to noise.

In terms of working principles, digital isolators mainly rely on the electromagnetic effect of magnetic fields. This effect creates a gap between the input and the output. Any signal or electrically generated noise that crosses the gap is isolated from the input and output. In addition, the isolator provides protection in the form of transient over-voltage protection, which limits the output voltage and prevents damage to the output circuit.

The ISO7420ED is a digital isolator used to protect sensitive components in low-voltage applications. It is an electrically isolated bidirectional digital data transmission bridge between two cables connected to peripherals. It has a metal oxide semiconductor (MOS) process technology, and both the power and signal lines are electrically isolated to provide a high level of protection and robust operation. It works by using an input control signal from the host to control the threshold levels and enable or disable the isolated channels. When it is enabled, it uses isolated channels to send and receive data from the host controller to the peripheral. The data is transferred through a galvanic isolation barrier, while the input and output lines remain isolated.

In summary, digital isolators can be used in a wide range of applications due to their application field and working principles. Their fields of application include high-speed data transfer, analog signal isolation, motor control, power supply isolation, medical equipment, home appliance and industrial control. The ISO7420ED is one of the most widely used digital isolators in low-voltage systems, used to provide electrical isolation for both signal and power lines, and to protect sensitive components from electrical interference.

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