Hi everyone,
Throughout my career I've tried to always do the best I can while optimising quality and time to market.
I have recently found myself in a position where differential pairs are frequently compromised in order to save time.
My gut feeling is that this is very bad but I find myself unable to explain why.
Please keep in mind that we are not talking about high-speed GHz signals as I will never allow those signals to be compromised.
This is about CAN, CANFD, RS485, RS422, and maybe a differential analogue input.
Kind regards,
Throughout my career I've tried to always do the best I can while optimising quality and time to market.
Maybe that means taking less time on component selection if I know a board will only be used once, but spending significantly longer on something that is going to be mass produced.
I have recently found myself in a position where differential pairs are frequently compromised in order to save time.
My gut feeling is that this is very bad but I find myself unable to explain why.
Compromised as in not using the correct impedance profile for part of the bus, not using any profile, sometimes separating the pair for a time, bad via entry/exits, etc. Also not adding clearance which results in GND pours getting too close and changing the edge coupled pair to a coplanar edge coupled pair, or allowing different pairs to get too close to one another without a GND shield.
Can someone please help me understand what the consequences are for all of this?Please keep in mind that we are not talking about high-speed GHz signals as I will never allow those signals to be compromised.
This is about CAN, CANFD, RS485, RS422, and maybe a differential analogue input.
Kind regards,
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