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ADUCM4050 ADC power supply

Question asked by florent Employee on May 24, 2018

Hi EZ,

 

I am currently doing a schematic using the ADUCM4050, and his internal ADC, and I would like to know few stuff : 

  • Is that possible to have Vbat_ADC set to a different value than the other Vbat of the microcontroller ? 
  • Is that mandatory to have Vbat_ADC = Vref_ADC ? 

 

I am asking this cause I would like to powered up the ADUCM4050 with 2.5V, and having a Vref for the ADUCM40050 ADC's set to 3.3V (cause we would like to measure voltage up to 3V approximatively).

 

So is that possible to set : 

Vref_ADC = 3.3V   //   Vbat_ADC=3.3V //   other Vbat=2.5V  

                                             OR

Vref_ADC = 3.3V   //   Vbat_ADC=2.5V //   other Vbat=2.5V  

 

Thanks for your help,

Florent

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