Abstract: An interface circuit uses the Dallas Semiconductor 1-Wire serial bus to provide isolated power and bidirectional communications between a master (MCU) and a sensing element.Mar 23, 2006 Abstract: An interface circuit uses the Dallas Semiconductor 1-Wire serial bus to provide isolated power and bidirectional communications between a master (MCU) and a sensing element. Medical and industrial applications often requiregalvanic isolationof 2500VAC or higher for the safety of patients and equipment operators. The isolation barrier conveys not only power to the sensing element, but also data to or from that element. Each data signal crossing the barrier requires isolation, so one typically saves costs in these applications by choosing a serial bus rather than aparallelbus. Serial buses includeSPI,IC, and the Dallas 1-Wire bus. The Dallas Semiconductor 1-Wire requires only a single data line (plus ground) for bidirectional communications. Because opto- isolators ……