One of my customers is investigating direct conversion circuit by using ADI TxDAC.
His product is FM transmitter. His circuit architecture is two steps, digital frequency modulation by FPGA and direct conversion DAC. RF output frequency is 76 to 95MHz range.
I first recommended AD9139 to him, but he would like to have x4 interpolator or x8 interpolator. Now he is investigating AD9125. AD9125 is dual channel DAC, however, he only use single channel. His requirements for the DAC are x4 or x8 interpolator and high-speed DAC only, and he doesn’t need mixer and NCO functions.
His would like to double check with you that it is possible to disable the NCO and mixer function by the Datapath Control Register.
And if you have any other recommendation, please let us know.