NO. As long as you have selected Vcc as the A/D reference, and have 
decoupled all the pins as per the data sheets then NO. Equally important 
is to have a dedicated AVcc supply. This can be as simple as a Vcc track 
that ONLY connects to Analog devices, and which is separately decoupled.

Al

hc08jb8 wrote:

> Hello Guys
> 
> 
> I am using ADC10 on a F1232, A0 is wired to the adc out of a pressure 
> sensor, the sensor is powered by the same battery as the MCU, in 
> order to get the Vcc as a reference point, does REFOUT has to be set 
> and it be powered by this reference output?
> 
> Thanks
> Jay
> 
> 
> 
> 
> .
> 
>  
> Yahoo! Groups Links
> 
> 
> 
>  
> 
> 

Hello Guys


I am using ADC10 on a F1232, A0 is wired to the adc out of a pressure 
sensor, the sensor is powered by the same battery as the MCU, in 
order to get the Vcc as a reference point, does REFOUT has to be set 
and it be powered by this reference output?

Thanks
Jay