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AMC1211-Q1: Differences among 3 input voltage specs

Yoshiki Ochi
Expert 8165 points
Part Number: AMC1211-Q1

Hi team, 

Could you tell me what are the differences among ["input voltage VIN" shown in "6.1 Absolute Maximum Ratings"], ["absolute input voltage" shown in "6.3 Recommended Operating Conditions"] and ["specified linear input full-scale voltage" shown in "6.3 Recommended Operating Conditions"]?

Regards,
Ochi

  • 0
    Guru 271840 points

    When you stay inside the VFSR limits, you are guaranteed to get the specified electrical characteristics.

    When you go outside the VFSR limits, but stay inside the recommended operating conditions, the device will still work, but with worse electrical characteristics.

    When you go outside the recommended operating conditions, the device is not guaranteed to work.

    When you go outside the absolute maximum ratings, the device might get damaged.

  • 0 in reply to Clemens Ladisch
    TI__Expert 8165 points

    Hi Ladisch-san, 

    Thank you for your quick response.

    When you stay inside the VFSR limits, you are guaranteed to get the specified electrical characteristics.
    → I understood

    When you go outside the VFSR limits, but stay inside the recommended operating conditions, the device will still work, but with worse electrical characteristics.
    → How much worse electrical characteristics will he work with? Is it related to some of parameters such as gain error, gain error drift, and so on? Or is it described in electrical characteristics in datasheet?

    When you go outside the recommended operating conditions, the device is not guaranteed to work.
    → I am not clear for the difference between going outside the VFSR limits and going out of the recommended operating conditions. Could you tell me what is the difference in more detail?

    When you go outside the absolute maximum ratings, the device might get damaged.
    → I understood.

    Regards,
    Ochi

  • 0 in reply to Yoshiki Ochi
    Guru 271840 points

    The parameters for going outside VFSR limits are not specified.

    When you go outside the recommended operating conditions, the device might not work at all, i.e., it might not generate an output signal, or generate a completely wrong one.

  • 0 in reply to Yoshiki Ochi
    TI__Guru**** 172906 points

    Ochi-san,

    If Vin exceeds VClipping, but is still less than the ABS MAX, the device will saturate and the outputs will be railed to either FS+ or FS-, depending on the applied input voltage.  Between VFSR and VClipping, the outputs will not be guaranteed to follow the datasheet specification for linearity, THD, SNR, etc.

  • 0 in reply to Tom Hendrick
    TI__Expert 8165 points

    Ladish-san and Tom-san, 

    Thank you for your help. I understood clearly. 

    Regards,
    Ochi