Hi.

1. What is meaning Fdata?

Is DCI? If not what Purposes used?

2. I'm designed like below.

I want to use the 75MHz outputs.

REFCLK is 75MHz.

Input data is 16bit data of 15MHz sine wave.(Generated by FPGA)

3. So i setting like below.

PLL loop divider is 16.(N1)(For Fdacclk = 1.2GHz)

PLL VCO divider is 1.(N0)(For Fvco = 1.2GHz)

4. I don't understand Fnco and Fcarrier.

Fnco and Fcarrier, What are the proper way to calculate?

1. What is meaning Fdata? Is DCI? If not what Purposes used?

Input I/Q data rate. In the word mode, it is the same as the DCI rate.

2. I'm designed like below.

I want to use the 75MHz outputs.

REFCLK is 75MHz.

Input data is 16bit data of 15MHz sine wave.(Generated by FPGA)

You will need to configure the PLL divide ratios so that Div0*Div1*REFCLK is between 1GHz and 2GHz.

3. So i setting like below.

PLL loop divider is 16.(N1)(For Fdacclk = 1.2GHz)

PLL VCO divider is 1.(N0)(For Fvco = 1.2GHz)

Correct.

4. I don't understand Fnco and Fcarrier.

Fnco and Fcarrier, What are the proper way to calculate?

Your baseband frequency is 15MHz and your DAC output frequency is 75MHz. So the NCO frequency is 75-15 =60MHz. This is Fcarrier. Fnco is the rate NCO is running at. It depends on the interpolation configurations. If the NCO is at the last stage of the digital path, it is at the same rate as Fdac. If there is one stage of 2x interpolation filter after the NCO, the NCO is then running at Fdac/2.