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LMV339: Propagation delay time

Masayoshi Takahashi
Intellectual 1530 points
Part Number: LMV339
Other Parts Discussed in Thread: LMV393

Hi team,

My customer is designing the schematic with LMV339. The customer would like to know the propagation delay time.

Could you please give your advice for below question?

  1. Figure 5 and 6 showed the propagation delay when the over drive voltage is 100mV. How much the time will be change if over drive voltage is increase? Slope is same in spite of the over drive voltage condition?
  2. Test condition of the figure 5 and 6 is only TA = 25C. Could you provide the data that TA = -40C and TA = 100C when the supply voltage is 3.3V? The customer need the data as soon as possible. If we can estimate the data, please tell me.

Regards,

Yoshi

  • 0
    TI__Mastermind 49896 points

    Hello Takahashi-san,

    I found some LMV393 over temp data. It is in raw tester data form and will take a bit to format for customer use.

    We did not originally characterize at 100C and 3.3V, but will have to interpolate between 85C and 125C and 2.7V and 5V.

    I hope to have this to you by COB Wednesday Santa Clara time.

  • 0 in reply to Paul Grohe
    TI__Intellectual 1530 points

    Hi Paul,

    Thanks for checking.

    I'm looking forward to get the test result  and answer from you by COB Wed on Santa Clara time.

    Regards,

    Yoshi

  • 0
    TI__Mastermind 49896 points

    Hello Takahashi-san,

    Please see the curves below.

    I could not find any data for 3.3V. They were only characterized at 2.7V and 5V.

    The 2.7V can be used as a worst-case for 3.3V. 

    I would speculate that the 3.3V prop delay will be about 20% less than the 2.7V. The changes between 2.7V and 3V will be greater than the changes between 3V and 5V (not linear - greater changes at lower voltages).

    I will send you better resolution graphs internally.

  • 0 in reply to Paul Grohe
    Guru 140200 points

    That's exactly why I like this forum. You not only get individual help but you will also find additional specifications that were never published in a datasheet.

    Thanks, Paul.

    Kai