App note: Implementing an Isolated 1-Wire Bus

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An app note from Maxim:  Implementing an Isolated 1-Wire Bus

The 1-Wire® bus has become increasingly popular for the authentication and calibration of sensors and consumables in medical equipment, where galvanic isolation is required. Building on application note 4206, “Choosing the Right 1-Wire Master for Embedded Applications,” this article explains how to modify existing 1-Wire master circuits to implement galvanic isolation. In addition to the classic optoisolators, digital isolators using magnetic and capacitive coupling have been developed in recent years. This application note introduces each of these technologies and product lines, and identifies and compares isolators that are suitable for use in 1-Wire master circuits.

A similar version of this article appeared in the April 2012 issue of Electronic Engineering magazine.

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