We are looking at combining the ADF4350 and ADL5385 to create a transmit chain covering the 200MHz-400MHz frequency range. The transmit path requires a 1.2MHZ GMSK waveform.
What would be the recommended DAC(s) to go along with this lineups? There are no requirements for multi-carrier operation; and we are looking for a dual-DAC package. We are also looking at significantly oversampling to ease the anti-alias filter between the DAC and IQ-MOD (this oversampling is currently planned before the DAC, but could be moved inside the DAC if the part allowed for it). Initially, we looked at the AD9765, but not sure if this would be good enough.
The previous posting offered an RF DAC(AD9789 : 14Bit, 2400MSPS) could be considered as an alternative to a Baseband DAC & IQ Modulator(ADL5385) approach. For Baseband DAC and IQ Modulator approach, we would suggest either AD9117/16 ( 20ma output) or AD9717/16 (2ma output) depending on whether lower power is important or output current close to 20ma and lower noise is more critical.
For the detail performance of those suggested12/14 bits DAC, refer product pages at our web site( www.analog.com ).