Here we have a request in the application of high speed DAC. We’d
like to use AD9779A, it’sthe dual DACs for I and Q output. If we use one port of it just as a direct IF
DAC, the bandwidth is 100MHz, center frequency is 312.5MHz, is it possible?
Objective: Convert a digitized baseband IQ data to an Analog IF
signal with the response shift to Fdac/4
Input: digitized baseband IQ with data_rate = 125MSPS each (to form
a 100MHz BW).
output: Analog IF signal (response shift to Fdac/4)
I=250MSPS IF Data
Interpolation = 4
Modulation = FDAC/4
=>Response shift 250MHz (FDAC/4)