We intend using the AD9136 dual DAC to feed the ADRF6780 modulator via a differential filter with a base band signal to get an RF output directly at 8 GHz.
I have two questions:-
1). If using the base band I/P's on the ADRF6780 how are the IF ports terminated? Are they left floating or terminated in 50 Ohms?
2). The AD9136 has a compliance voltage of -250mV to +750mV and the ADRF6780 requires an input offset voltage of 0.5 volts. Is there a recommended way of interfacing these two opposing requirements whilst maintaining the best DAC resolution? I guess there are passive or transformer options available?
Many thanks for your hep