RF-DAC Analog Outputs - 2.6 English

Zynq UltraScale+ RFSoC RF Data Converter Gen 1/2/3/DFE LogiCORE IP Product Guide (PG269)

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2.6 English

Each RF-DAC in a tile has its own differential analog current output buffer/driver. The output currents are complementary; the sum of the two currents always equals the full-scale current of the RF-DAC. The digital input code determines the effective differential current delivered to the load. The differential RF-DAC outputs are typically AC-coupled out using capacitors. RF-DAC output DC-coupling is also supported, assuming that the correct common mode biasing and load impedance requirements are met. See UltraScale Architecture PCB Design User Guide (UG583) for more details.

Note: On Gen3/DFE devices, using DAC DC coupling reduces the VOP range. For more information, see Zynq UltraScale+ RFSoC Data Sheet: DC and AC Switching Characteristics (DS926).