ADC read giving value more than its resolution .

Anonymous · ‎Oct 04, 2017

I am using CY8CKIT-044 kit for development .I am using VDD as reference and channel is configured as 12 bit resolution .

For voltage range below 3.3 it is working fine .

However if i apply 3.3 volt to channel ,reading sometimes exceed 4095 like 4096 and 4097 ,

since it has 12 bit resolution how values are coming more than that . I want to understand why it is happening and is it normal

or not .

Below are the settings that i have used and isr snippet:

RodolfoGL · ‎Oct 04, 2017

Hi,

By selecting the Average Mode equal Accumulate, you allow the number to grow up to a 16-bit value.

If you want to make sure the value do not grown beyond the maximum value for the given resolution (12-bits), choose the Fixed Resolution.

Re: ADC read giving value more than its resolution .