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TCAN1043A-Q1: CAN output current / output impedance

Martin Steube-Henkel
Intellectual 1430 points
Part Number: TCAN1043A-Q1
Other Parts Discussed in Thread: SN65HVD230Q-Q1, , SN65HVD230, TCAN1043

Hello 

in older versions of CAN transceiver datasheets (eg SN65HVD230Q-Q1) output current (IOH, IOL) of the driverstage are mentioned.

For TCAN1043A-Q1 short circuit current of 100mA is available. 

Any data available available for output current / output impedance? 

Thanks 

Martin

  • 0
    TI__Guru 71012 points

    Martin,

    Thanks for your patience, we'll have a response to you by Monday, 08/07/2023, end of business CST.

    Regards,

    Eric Hackett 

  • 0
    TI__Guru 50795 points

    Hi Martin,

    The Iso(rec) values for TCAN1043A would be roughly comparable parameters to the IIH and IIL specifications from the SN65HVD230. Because the input voltage range of the TCAN1043A is much larger, the test conditions are more extreme with -27 to 42V being applied to the bus pins instead of the 0.8V and 2.0V test conditions of the SN65HVD230. Because of this, we see much larger currents through the CAN pins with the higher applied voltages. The impedance characteristics if the CAN pins are also included in the receiver section of the datasheet parameters. 

    Is this enough information for your needs? If not, could you share what you are using these values for? It may help me provide some more relevant information. 

    Regards, 
    Eric Schott 

  • 0 in reply to Eric Schott1
    TI__Intellectual 1430 points

    Hi Eric,

    I am not referring to the input current of TCAN1043. Input impedance and input current are mentioned in the d/s.

    I am looking for the output current of CANH and CANL. Can I use Fig 9-3 as reference?

    thx 

    Martin

  • 0 in reply to Martin Steube-Henkel
    TI__Guru 50795 points

    Hi Martin,

    Yes, Figure 9-3 can be used to estimate the driver dominant output impedance under a 60-ohm differential load. The RIN specification for the receiver represents to output impedance when the driver is in the recessive state. 

    Let me know if you have any more questions. 

    Regards, 
    Eric Schott