TCAN1046A-Q1: CAN impedance

rockz

Prodigy 90 points

Part Number: TCAN1046A-Q1

Do we need to control impedance of the CAN BUS traces ? If yes what is the impedance value ?

over 2 years ago

0 Eric Hackett over 2 years ago

TI__Guru 60242 points

Viny,

It is recommended to match the impedance to 60 ohms, since that is what the intended CAN bus impedance is meant to be.

Regards,

Eric Hackett

0 rockz over 2 years ago in reply to Eric Hackett

Prodigy 90 points

Hi Eric,

Is it single ended 60 ohms ? in some article i found differential 120ohms

0 Eric Hackett over 2 years ago in reply to rockz

TI__Guru 60242 points

Viny,

That is correct, on a CAN bus there will be 120 ohm termination resistors between CANH and CANL on both ends of the bus, creating 60 ohms overall bus impedance due to both resistors being in parallel.

Regards,

Eric Hackett

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TCAN1046A-Q1: CAN impedance