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The information presented in this cross reference is based on TOSHIBA's selection criteria and should be treated as a suggestion only. Please carefully review the latest versions of all relevant information on the TOSHIBA products, including without limitation data sheets and validate all operating parameters of the TOSHIBA products to ensure that the suggested TOSHIBA products are truly compatible with your design and application.
Please note that this cross reference is based on TOSHIBA's estimate of compatibility with other manufacturers' products, based on other manufacturers' published data, at the time the data was collected.
TOSHIBA is not responsible for any incorrect or incomplete information. Information is subject to change at any time without notice.
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What are the pros and cons of different types of galvanic isolations?
Galvanic isolation means the method to isolate systems electrically that operate within different potentials. There are various methods to accomplish this like optical-insulation, capacitive-insulation, magnetic-insulation, and mechanical-insulation.
The table below shows the comparison among the insulation methods. Digital isolators have some weaknesses in the external magnetic field or CMTI. However, Toshiba supplies products with robust properties against external magnetic fields by utilizing a unique isolation transformer circuit.
| Photocoupler | Digital isolator | ||
|---|---|---|---|
| Coupling | Optical coupling  |
Magnetic coupling  |
Capacitive coupling  |
| Pros | Reliable Insulation Multi-channel, High EMC |
Long life, Fast-transmission rate, Multi-channel, High-CMTI |
Long life, Fast-transmission speed, |
| Cons | Limitation of Transmission rate (50Mbps max) | Weakness against external magnetic field* (EMC) | Weakness of CMTI |
* : Adopting our proprietary method to prevent noise from external magnetic field.
For Standard Digital Isolator products, please refer to the following links.
