If this is the case you should use a pseudo differential ADC. It allows IN- to vary up to ~100mv or so from ground and the IN+ can go all the way to the ref value. There are pin compatible p-diff parts like the AD7660. However there are newer p-diff ADCs…

Hi vlad8016,

         What Klaus mentioned are right. There are three most common types of ADC input structure a.) Single- Ended b.) Pseudo Differential c.) True Differential.  From your description above I can see that you are looking for ADC that has a pseudo…

Hi Postino,

Here are some list of ADC that could be suitable for your application. You may also wanted to check the ADI website and do a parametric search and put in parameters on the ADC that you wanted to search. Please refer to the link below.