iCoupler® digital isolators from Analog Devices use chip-scale microtransformers as the coupling element to transfer data across a high quality polyimide insulation barrier. Two primary methods of data transfer have been used in iCoupler® isolators: single-ended and differential. Selection of a data transfer scheme involves engineering trade-offs to optimize the desired characteristics of the end product.
This article examines how data transfer methodology is one option in the designer’s toolbox when optimizing digital isolator performance. Having a truly differential coupling element as the basis of iCoupler® technology provides great flexibility in this regard, which optocouplers and capacitive coupling devices typically can’t match.
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