bmwman91 Posted December 10, 2022 Report Share Posted December 10, 2022 I am finishing up integration of my E36X and am looking to add a CAN EGT module. The thermocouple ADC module will be of my own custom design and will not draw over 100mA. Can I use the 14V and GND pins on the 5-pin CAN2 connector for power and data, or do I need to use an external source? I am not using the 5V reference supply pin on the Expansion connector for anything. What is the max output current for that pin, and would it be suitable for powering my CAN EGT module? Quote Link to comment Share on other sites More sharing options...
Adamw Posted December 10, 2022 Report Share Posted December 10, 2022 The 14V will do a couple of amps no worries. The 5V reg is rated to 400mA for quoted accuracy, this supplies all 5V outputs, not just the exp connector. Quote Link to comment Share on other sites More sharing options...
bmwman91 Posted December 13, 2022 Author Report Share Posted December 13, 2022 Thanks for the info. Does the interface support both 3.3V and 5V differential signal amplitudes? Quote Link to comment Share on other sites More sharing options...
Adamw Posted December 13, 2022 Report Share Posted December 13, 2022 Power supply voltage of the transceiver is irrelevant, it is only the output that is important. CAN is defined by a range of standards, for example ISO 11898-2 for high speed CAN states that the transceivers must operate with a common-mode point between -2V to 7V and the dominant state must have greater than 0.9V differential between H & L. All CAN transceivers should be capable of meeting these standards otherwise you couldnt call it a CAN transceiver. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.