When AD7484 works in dtandby mode,Can we turn off the analog power-AVDD ? and the AD7484 is powered only by DVDD supply?
I have attached a list of some of the ADCs that fit your criteria of 2MSPS sampling rate or higher at resolution of 12bits or more.
You may also wanted to check the ADI website and do a parametric search (http://www.analog.com/ps/psthandler…
You may want to check the ADI website and do a parametric search to filter the product display base form your recommended specification.
Here are some ADCs that might help you start with, kindly see attched file.
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.