Hi,
A follow up on the thread that discussed the max CAN bitrate versus the Recessive bit RC decay:
We are considering a protective network at each CAN node consisting av a simple bidirectional TVS from both CAN_H and CAN_L to the local ground at each node. Now some questions:
- Since both TVS diodes are connected to the same point (the local ground) the bus capacitance between CAN_H and CAN_L will be the sum of two TVS diodes. Is this correct ?
- When calculating the RC decay time when several nodes are connected to the CAN bus: should I sum up the parallel capacitance of the TVS diodes on all nodes, or should I only consider the local capacitance on a single node when calculating the worst case RC decay time ?
Basically I wonder if the RC decay time is affacted when more nodes are connected to the CAN bus.