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TCAN844-Q1: VDIFF

Beida Song
Intellectual 780 points
Part Number: TCAN844-Q1
Other Parts Discussed in Thread: TCAN844V-Q1

Tool/software:

Hi Expert,

VDIFF is -120mV ~+12mV  for TCAN844V-Q1. What’s the advantage compared to HVDA551, which is -12mV ~+12mV?

  • 0
    Guru 316780 points

    There is no advantage; the ideal value would be zero.

    Anyway, this appears to be a typo; both transceivers should have ±12 mV limits (corresponding to a leakage current of ±0.2 mA).

  • 0
    TI__Mastermind 27860 points

    Hi Beida,

    There is no advantage, it might be a typo on HVDA55x datasheet, but -120mV ~+12mV is a specificiton consistent on our CAN transceivers.

    Regards,

    Sean

  • 0 in reply to Sean Guo
    TI__Intellectual 780 points

    Hi Sean,

     Customer needs Environmental Operation Temperature. Dwight gave below reply. Can you help calculate the Ta temperature range?

    1. Temperature: this is how we write our CAN datasheets. You need to see the junction temp, which is specified max at +150C, and then look at table 5.5 thermal characteristics, which shows the Junction-to-ambient thermal resistance based on package type. Our datasheet in the electrical characteristics table has all data verified with TJ up to +150C, which normally translates to ≥125C.
  • 0 in reply to Beida Song
    TI__Mastermind 27860 points

    Hi Beida,

    We don't specify an operation ambient temperature in datasheet. The junction temperature is the critical factor in determining the operation of the device. As Dwight said they need to look at table 5.5 thermal characteristics that shows the junction-to-ambient thermal resistance to calculate the maximum junction temperature it can reach at a certain ambient temperature. For example, operating the device at 150C ambient temperature may mean that the junction temperature is above 150C, potentially leading to thermal shutdown.

    https://www.ti.com/lit/an/spra953d/spra953d.pdf

    Regards,

    Sean