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[FAQ] [H] Digital Isolators - Top Questions, Answered

Kenneth Arnold
Expert 8030 points

Quickly find solutions to common questions about digital isolator devices by clicking this link. This FAQ answers the most common questions asked about these devices …… ……… …

FAQ: Isolation >> Digital Isolators

Digital Isolators Isolated Interfaces Transformer Drivers

(NEW) Functional Isolation:

  1. [FAQ] What is a functional Isolator?

  2. [FAQ] How can Functional Isolators correct ground shifts and improve noise tolerance on a signal line? - Isolation forum - Isolation - TI E2E support forums

General FAQs:

  1. [FAQ] What is the difference between ISOxxxxF and ISOxxxx devices (Ex. ISO7741 vs. ISO7741F)?

  2. [FAQ] How to calculate the maximum SPI speed supported by a digital isolator?

  3. [FAQ] Can a digital signal be applied to digital isolator input when its respective VCC is 0V?

  4. [FAQ] Can channel input/output pins on a digital isolator be left floating?

  5. [FAQ] Can I power two sides of a digital isolator with different voltages?

  6. [FAQ] How do I read TI's Digital Isolator part numbers?

  7. [FAQ] How do you generate isolated power for a digital isolator?

  8. [FAQ] Can a digital isolator signal voltage be different from its power supply?

  9. [FAQ] What is the best cross reference replacement for the ADuM1441 and ADuM1446 devices?

  10. [FAQ] How do you set current limits and voltage thresholds in your system using digital input modules?

  11. [FAQ] What is the difference between basic and reinforced digital isolators?

  12. [FAQ] ISO7041: What is the FIT data for this part?

  13. [FAQ] What is the logic state of a digital isolator with no input signal?

  14. [FAQ] What is TI's lowest power digital isolator?

  15. [FAQ] In high channel count designs, how do I reduce the number of digital connections to the MCU?

Digital Isolators for Communication:

  1. [FAQ] How to connect SPI MCU to multiple isolated SPI nodes?

  2. [FAQ] Can I connect two unidirectional channels on digital isolators to achieve a bidirectional channel for I2C communication?