Transcription of AN-770 APPLICATION NOTE - Analog Devices
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AN-770 APPLICATION NOTE - Analog Devices
AN-770 APPLICATION NOTEOne Technology Way Box 9106 Norwood, MA 02062-9106 Tel: 781/329-4700 Fax: 781/461-3113 Controller Area Network (CAN) bus, a robust protocol designed for industrial applications , was originally developed for use in cars. It specifies a maximum cable length of 40 meters and up to 30 nodes. The flexibility and advantages of this specification have resulted in increased use in a wide range of applications . Because the CAN bus system is typically used to connect multiple systems and is often run over very long distances, isolation between the bus and each system connection is critical. Isolation provides protection from overvoltage transients between the CAN bus cable network and the systems connected to it.
–2– AN-770 –3– AN-770 During dominant state the active driver configures the CANH line to a high level and the CANL line to a low voltage level.
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