I am using the ad9281 as the basis for a USB oscilloscope.
The first problem is noise if I go above 10MHz clocking.
If I reduce the clock speed the noise goes down.
The other problem is with 1 volt in I am getting code 166 out when it should be 128.
Vref is 2 volts.
I am using a PIC micro to clock the a2d then I just read data in to PIC port b so its pretty basic really.
Any advice would be appreciated.