ADI ADUM1281WCRZ

The ADuM1280/ADuM1281/ADuM1285/ADuM1286 are dual-channel digital isolators based on iCoupler technology. Combining high speed CMOS and monolithic air core transformer technology, these isolation components provide outstanding performance characteristics superior to alternatives, such as optocoupler devices and other integrated couplers. With propagation delay at 23 ns, pulse width distortion is less than 2 ns for C grade. Channel-to-channel matching is tight at 5 ns for C grade. The two channels are independent isolation channels and are available in two channel configurations with three different data rates up to 100 Mbps. Industrial grade models operate with the supply voltage on either side ranging from 3.135 V to 5.5 V and the automotive grades operate from 3.135 V to 5.5 V, providing compatibility with lower voltage systems as well as enabling a voltage translation functionality across the isolation barrier. The isolators have a patented refresh feature that ensures dc correctness in the absence of input logic transitions. When power is first applied or is not yet applied to the input side, the ADuM1280 and ADuM1281 have a default high output, and the ADuM1285 and ADuM1286 have a default low output.

• Up to 100 Mbps data rate (NRZ)
• Low propagation delay: 23 ns typical
• Low dynamic power consumption
• Bidirectional communication
• 3.3 V to 5 V level translation
• High temperature operation: 125°C
• High common-mode transient immunity: >25 kV/μs
• Default high output: ADuM1280/ADuM1281
• Default low output: ADuM1285/ADuM1286
• Narrow body, RoHS-compliant, 8-lead SOIC
• Safety and regulatory approvals UL recognition: 3000 V rms for 1 minute per UL 1577 CSA Component Acceptance Notice 5A VDE Certificate of Conformity DIN V VDE V 0884-10 (VDE V 0884-10): 2006-12
• V10RM = 560 V peak
• Qualified for automotive applications

• General-purpose multichannel isolation
• Data converter isolation
• Industrial field bus isolation
• Hybrid electric vehicles, battery monitor, and motor drive