Top 6 design questions about I2C isolators Why are Digital Isolators Certified to Meet Electrical Equipment Standards?ĭistance Through Insulation: How Digital Isolators Meet Certification Requiremen How Do Isolated I2C Buffers with Hot-Swap Capability and IEC ESD Improve. UL Certificate of Compliance File E181974 Vol 4 Sec 3 VDE Certificate for Basic Isolation for DIN EN IEC 60747-17 (Rev. F)ĬQC Certificate for ISO154xD, ISO742xD, ISO71xxDBQ (Rev. ISO154x Low-Power Bidirectional I2C Isolators datasheet (Rev. Isolated bidirectional communication is accomplished within these devices by offsetting the low-level output voltage on side 1 to a value greater than the high-level input voltage on side 1, thus preventing an internal logic latch that otherwise would occur with standard digital isolators. For applications where clock stretching by the target is possible, the ISO1540 device should be used. Analog Devices iCoupler digital isolation protects your people and assets from high voltages and shields critical data from disruptive electric interference. The ISO1541 is useful in applications that have a single controller while the ISO1540 is suitable for multi-controller applications. The ISO1540 has two isolated bidirectional channels for clock and data lines while the ISO1541 has a bidirectional data and a unidirectional clock channel. The ISO1540 and ISO1541 devices enable a complete isolated I 2C interface to be implemented within a small form factor. This isolation technology provides for function, performance, size, and power consumption advantages when compared to optocouplers. When used with isolated power supplies, these devices block high voltages, isolate grounds, and prevent noise currents from entering the local ground and interfering with or damaging sensitive circuitry. These devices have logic input and output buffers that are separated by Texas Instruments Capacitive Isolation technology using a silicon dioxide (SiO 2) barrier. The ISO1540 and ISO1541 devices are low-power, bidirectional isolators that are compatible with I 2C interfaces.
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