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FrankK's avatar
FrankK
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3 years ago

MAX10 ADC DC characteristics

Hello,

what is the maximum non-destructive voltage level, which can be tolerated for limited period of time by MAX10 ADC input channel, provided VCCA and VCCIO1A are 3.3V for single supply device?

ADC user guide (UG-M10ADC) says "In single supply MAX 10 devices, it can measure up to 3.0 V or 3.3 V, depending on your power supply voltage."

Data sheets specifies maximum input voltage to Vref.

Thanks in advance.

Frank

6 Replies

  • AqidAyman_Altera's avatar
    AqidAyman_Altera
    Icon for Regular Contributor rankRegular Contributor
    3 years ago

    Hi Frank,


    Thank you for reaching out Intel FPGA Community.


    How about your ADC Supply Voltage (VCC_ONE)?


    Regards,

    Aqid


    • FrankK's avatar
      FrankK
      Icon for New Contributor rankNew Contributor
      3 years ago

      Dear Aqid,

      sorry for my late answer. I missed your reply.


      VCC_ONE is also powered by 3.3V domain (same as VCCA).

      Best regards
      Frank

  • AqidAyman_Altera's avatar
    AqidAyman_Altera
    Icon for Regular Contributor rankRegular Contributor
    3 years ago

    Hi Frank,


    According to datasheet, as you mentioned, the analog input voltage can go up to Vref, while Vref can go up to VCC_ONE as the maximum value.


    Since your VCC_ONE is 3.3V, the maximum analog input voltage would be 3.3V. It is similar with the statement you found in the ADC user guide.


    Regards,

    Aqid


    • FrankK's avatar
      FrankK
      Icon for New Contributor rankNew Contributor
      3 years ago

      Hello Aqid,

      In order to exclude any misconceptions: Let me rephrase my question.

      With respect to below voltage conditions, would an ADC input voltage of up to 3.3V (Vadc_in > Vref & Vadc_in <= VCC_ONE) cause any damage or impact device reliability or life time?

      Vref = 3.0V
      VCC_ONE = 3.3V
      VCCAx = 3.3V
      VCCIO1A = 3.3V

      Best regards
      Frank

  • AqidAyman_Altera's avatar
    AqidAyman_Altera
    Icon for Regular Contributor rankRegular Contributor
    3 years ago

    For a better situation, I would suggest you increase the Vref to 3.3V or else, keep the Vin not exceed 3.0V (follows the value of Vref as per datasheet) as I do not have the confidence it will not have any impact for the device in a certain period of time.


  • AqidAyman_Altera's avatar
    AqidAyman_Altera
    Icon for Regular Contributor rankRegular Contributor
    3 years ago

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