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ISO7720: Output low level voltage

NAOKI AOYAMA
Guru 11215 points
Part Number: ISO7720

Hello,

I have a question about the Figure 10 on the datasheet.

In the graph, VCC=5V, 2.5V, 3.3V are drawn in order from the top.

Is this order correct?

Regards,

Naoki Aoyama

  • 0
    TI__Intellectual 2325 points
    Hi Aoyama-san,

    Thanks for posting your question on E2E!

    Looking at Figure 10 (Vol versus load current): the 5V curve is definitely correct, but we need to double check the order of 3.3V curve and 2.5V curve - it *maybe* swapped.

    In the electrical characteristics section, the following typical values are listed for Vol:
    - For 5V supply, Vol typ = 0.2V @ 4mA
    - For 3.3V supply, Vol typ = 0.1V @ 2mA
    - For 2.5V supply, Vol typ = 0.05V @ 1mA

    The different currents makes direct comparisons slightly tricky and the 3.3V and 2.5V curves are very close to each other for currents < 5mA.
    So I will follow-up and confirm this. Thank you for bringing this to our attention.

    Best regards,
    Abhi
  • 0 in reply to Abhi Aarey
    Guru 11215 points
    Hi Abhi,

    Thank you for your reply.
    I thought the on resistor of the output FET become lower as supply voltage increase.
    So, I ask you this question.
    I'll wait for your confirmation.

    Best Regards,
    Naoki Aoyama
  • 0 in reply to NAOKI AOYAMA
    TI__Intellectual 2325 points

    Hi Aoyama-san,

    I can confirm that the  VOL curves are indeed swapped. We will fix this graph.

    Until then, please continue to use the values in the electrical tables section of the datasheet where we have both typical and Max values.

    Please let us know if you have more questions.

    Regards,

    Abhi

  • 0 in reply to Abhi Aarey
    Guru 11215 points
    Hi Abhi,

    Thank you for your reply.
    I see.
    I will suggest the customer refer to the electrical characteristics table.

    Thanks,
    Naoki Aoyama