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CDCLVP1102: The variation of differential output peak to peak voltage

wang shu
Prodigy 240 points
Part Number: CDCLVP1102

Hi,

The differential output peak to peak voltage in the datasheet is 0.5V to 1.35V. Looks like it is a full frequency range spec in datasheet figure 2. my application is 80MHz, the typical value shall be close to 1.2V. What is the variation range of this spec. i mean what is the min and max Vpp at 80MHz application?

The load chip is sensitive about the input power. So I wish the min output power of CDCLVP1102 at 80MHz is enough.

Regards,

  • 0
    TI__Genius 9250 points

    Hi Shu,

    You won't see a lot of variation for this low frequency since this output driver is frequency dependent.  As you can see the plot is for over temperature and we don't see any variation over temp and VDD. I don't have exact number but it would be helpful if you could tell what is your minimum value cutoff. Meanwhile, I will keep looking to see if we can provide exact numbers.  

    Best,

    Asim

  • 0 in reply to Asim Khan
    Prodigy 240 points

    Hi Asim,

    We can accept +-20% variation. i believe this chip shouldn't have such large variation. But the exact number will support a strong evidence for our application. At least can you give me a maxim variation value you think this chip can have?

    Regards,
    Shu

  • 0 in reply to wang shu
    TI__Genius 9250 points

    Hi Shu,

    I was able to look into an old dataset and the I found a data point close to your frequency. It was on 75MHz which is fairly close to your frequency value.

    Minimum value for VPP  at 85C and VCC 3.3V  = 1.2520547 V 

    Maximum value for VPP at -40C and VCC 3.3V = 1.28631605 V

    So the total variation is about 0.034 V which is less than 5% variation. I think it should be good in your system.

    Best,

    Asim