Source: Xin Si Jie Net

A digital isolator is a device that achieves the transmission of digital and analog signals in an electrical isolation state. Digital isolators have advantages such as strong anti-interference ability, high isolation voltage, one-way signal transmission, and long service life. They are widely used in fields such as instrumentation, power systems, industrial control, consumer electronics, and communication networks.

According to different transmission methods, digital isolators can be divided into three types: capacitively coupled isolators, optically coupled isolators, and magnetically coupled isolators. Capacitively coupled isolators use the principle of capacitive coupling to achieve signal transmission and have advantages such as low power consumption and high transmission rate. Optically coupled isolators are representative products of digital isolators. They have advantages such as a wide range of signal transmission, high isolation withstand voltage, and the ability to suppress voltage noise. Noise-sensitive devices and light-emitting devices are the main components of optically coupled isolators. However, they have disadvantages such as low transmission rate and short service life, and they are gradually being replaced by emerging products. Magnetically coupled isolators can simultaneously transmit both signals and energy and have a wide range of applications.

Digital isolators have a wide range of uses. In the field of instrumentation, digital isolators are mainly used in smart meters to improve the accuracy of meter data. In the field of industrial control, digital isolators are mainly used in industrial motor drives to suppress voltage noise. In the field of communication networks, digital isolators have strong anti-interference ability and can be applied to long-distance communication network systems. Driven by market demand, the development space of the digital isolator industry continues to expand. According to the “2023-2028 Digital Isolator Industry Market In-Depth Research and Investment Prospect Forecast Analysis Report” released by Xin Si Jie Industry Research Center, the global digital isolator market reached 420 million US dollars in 2022, with a year-on-year growth of 6.1%.