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AD9912 can't produce a sampling frequency of 1GHz,the actual sampling frequency is about 650M

Question asked by jcmshow on May 21, 2014
Latest reply on May 22, 2014 by sitti


          I use AD9912 with the  passive crystal 25M ,But change regsiter 0x0020 can't change the system clock.The system clock is always aboult 650M . Circuit according to the datasheet,and with the default value of register 0x0020 system clock is not correct also!

          By changing register  FTW can change the output frequency,but is not base the sampling frequency 1Ghz