A digital isolator is used to get a digital signal across a galvanic isolation boundary. They serve a similar purpose to optocouplers, except optocouplers are far too slow and error prone for high speed (1MHz+) digital signals. They also use a different coupling technology, usually transformer or RF link as opposed to an optical link.

While digital isolators only work with digital signals, they are frequently used to transfer digitised versions of analogue signals. The resulting signal chain will have better bandwidth, accuracy and linearity in comparison to an optocoupler based system. Optocouplers have inherent non-linearity and high unit to unit variations (+- 50% of your signal), so the circuit will need to immune to these variations or each unit individually calibrated.

Multiplexing digital channels across a single digital isolator path can be achieved very easily, which in turn simplifies the circuit and results in a net cost saving in-spite of using a more expensive isolation technology. In short, digital isolators are a superior to optocouplers in almost every regard
Market Analysis and Insights: Global Digital Isolators Market
Due to the COVID-19 pandemic, the global Digital Isolators market size is estimated to be worth US$ 356.8 million in 2022 and is forecast to a readjusted size of US$ 608.3 million by 2028 with a CAGR of 9.3% during the forecast period 2022-2028. Fully considering the economic change by this health crisis, Capacitive Coupling accounting for % of the Digital Isolators global market in 2021, is projected to value US$ million by 2028, growing at a revised % CAGR from 2022 to 2028. While Industrial Automation segment is altered to an % CAGR throughout this forecast period.
From a global perspective, Taiwan is the largest production area, and the main production companies are also concentrated in this area, such as Silicon Labs, ADI and TI. In North America, the total output accounting for 31.98% of the world, followed by Southeast Asia. The main manufacturers are ADI, Broadcom Corporation, Maxim Integrated and Infineon. China's digital isolator industry is still an underdeveloped market.
In terms of production side, this report researches the Digital Isolators capacity, production, growth rate, market share by manufacturers and by region (region level and country level), from 2017 to 2022, and forecast to 2028.
In terms of sales side, this report focuses on the sales of Digital Isolators by region (region level and country level), by company, by Type and by Application. from 2017 to 2022 and forecast to 2028.
Global Digital Isolators Scope and Segment
Digital Isolators market is segmented by Type and by Application. Players, stakeholders, and other participants in the global Digital Isolators market will be able to gain the upper hand as they use the report as a powerful resource. The segmental analysis focuses on production capacity, revenue and forecast by Type and by Application for the period 2017-2028.
Segment by Type
Capacitive Coupling
Magnetic Coupling
Giant Magnetoresistive GMR
Segment by Application
Industrial Automation
Automobile
Power Management
Telecom
Other
By Company
Silicon Labs
ADI
TI
Broadcom Corporation
Maxim Integrated
Infineon
Vicor
NVE
ROHM
Shanghai Chipanalog Microelectronics
Beijing Zhongke Gree Micro
2Pai Semiconductor
Production by Region
North America
Europe
Japan
China
Consumption by Region
North America
U.S.
Canada
Europe
Germany
France
U.K.
Italy
Russia
Asia-Pacific
China
Japan
South Korea
India
Australia
Taiwan
Indonesia
Thailand
Malaysia
Philippines
Vietnam
Latin America
Mexico
Brazil
Argentina
Middle East & Africa
Turkey
Saudi Arabia
U.A.E