Regarding ADC

Discussion in 'Embedded Systems and Microcontrollers' started by rancho, Jul 31, 2010.

  1. rancho

    Thread Starter New Member

    Jul 29, 2010
    2
    0
    HI,

    I hv to modify one pcb which is in use already, for other use with minimal changes in design.
    i m using pic16f822 with VCC=5V & ADC ref volt is 5V.
    But in new revision pic16f822 with VCC=3.3V, i dnt wnt to change code so can i use Vref=5V for ADC? ...with VCC=3.3VV?
     
  2. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    No, you can't have a voltage which is greater than Vdd.
     
  3. rancho

    Thread Starter New Member

    Jul 29, 2010
    2
    0
    thank you for reply.
     
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