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cmao
Visitor II
December 19, 2004
Question

what is the maximum supply voltage for analog circuits (maximum AVcc)?

  • December 19, 2004
  • 2 replies
  • 779 views
Posted on December 19, 2004 at 09:57

what is the maximum supply voltage for analog circuits (maximum AVcc)?

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    2 replies

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    cmaoAuthor
    Visitor II
    May 17, 2011
    Posted on May 17, 2011 at 12:03

    Our analog input ranges from 0 to 4V, so my question is:

    can I use the ADC in uPSD3354DV ? In other words, I'd like to set reference voltage Vref = 4.096 V, supply analog circuits with AVcc = 5V, MCU Module Vcc= 3.3V, and PSD module Vdd=3.3V, is this setting feasible?
    D
    daxenberger
    Visitor II
    May 17, 2011
    Posted on May 17, 2011 at 12:03

    Hi,

    AVref maximum is 3.6V! So you cannot use a higher voltage reference!

    You have to scale down your input voltage to a range that will not damage the MCU.

    Regards,

    Stefan

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