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russ
russ
Associate III
June 16, 2008
Question

V_DDA voltage and current consumption

  • June 16, 2008
  • 1 reply
  • 396 views
Posted on June 16, 2008 at 21:47

V_DDA voltage and current consumption

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    1 reply

    russ
    russAuthor
    Associate III
    May 17, 2011
    Posted on May 17, 2011 at 12:37

    I am migrating from a 5V processor to this STM32 running at 3v3. Unfortunately our sensors require a 5V power supply. Is it better for me to supply the V_DDA pin on the processor with power from the 5v regulator (pulled down to 3.3v through a resistor) or run the digital V_DD to the V_DDA pin with some extra noise filtration. I do no require greater than 10 bits of ADC accuracy.

    If I choose the former option of using the 5V regulator power on V_DDA does anyone know how much current this pin draws? Will it vary much? If the current draw varies, I may have some problems with a resistor in there causing a voltage swing.

    Thanks in advance.

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