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Connecting High speed DAC to Mixers in Digital modulation scheme

Question asked by veera on Aug 25, 2012
Latest reply on Aug 31, 2012 by bkamak


In digital IQ modulation based systems, the High speed DACs are connected directly to mixers by skipping IQ modulators.

In this case can we use same circuitry (which are used in connecting DACs to Modulators) to connect DACs to Mixers (Passive reconstruction filter circuit) or should we add any additional circuitry. Will the DAC seamlessly connect to the Mixer or should we do any power conversion with VGA or step attenuators.


The DAC used - AD9746

Mixer - ADL5801.


(DAC o/p frequency - 30 MHz)


Thanks in advance