Abstract

The susceptibility of controller area network (CAN) communications to electrical fast transients (EFTs) applied to the signal ports of transceivers is investigated. The impact of EFT stress is evaluated referring to IC level (IEC 62228) CAN standards. The main factors contributing to noise rejection in CAN signaling are analyzed and communication failures are highlighted. The effectiveness of measures to prevent failures during an EFT event is experimentally evaluated on several transceivers and design guidelines are proposed to improve immunity to transient noise.

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