RF-DAC Electrical Characteristics

Zynq UltraScale+ RFSoC Data Sheet: DC and AC Switching Characteristics (DS926)

Document ID
DS926
Release Date
2024-05-31
Revision
1.13 English
Table 1. RF-DAC Electrical Characteristics for ZU2xDR Devices
Parameter Comments/Conditions 1 Min Typ 2 Max Units
Analog Outputs
Resolution   14 Bits
Sample Rate   0.5 6.554 GS/s
Maximum Output Power 20 mA mode, VDAC_AVTT = 2.5V, 100Ω termination +1 dBm
32 mA mode, VDAC_AVTT = 3.0V, 100Ω termination +5 dBm
Analog Bandwidth Full power bandwidth (–3 dB) 4 GHz
On-die Termination Single-ended on-die termination to external 2.5V/3V VDAC_AVTT 3 50 Ω
Crosstalk isolation between channels 4 FOUT = 240 MHz –70 dBc
FOUT = 1.9 GHz –70 dBc
FOUT = 2.4 GHz –70 dBc
FOUT = 3.5 GHz –70 dBc
  1. RF-DAC sampling rate is 6.554 GS/s using external sampling clock.
  2. Typical values are specified at nominal voltage, Tj = 25°C.
  3. Consult S parameter I/O files for further details on input characteristics.
  4. Values represent two channel crosstalk worst-case values for any combination of channel selections.
Table 2. RF-DAC Electrical Characteristics for ZU39DR Devices
Parameter Comments/Conditions 1 Min Typ 2 Max Units
Analog Outputs
Resolution   14 Bits
Sample Rate   0.5 6.554 GS/s
Maximum Output Power 20 mA mode, VDAC_AVTT = 2.5V, 100Ω termination +1 dBm
32 mA mode, VDAC_AVTT = 3.0V, 100Ω termination 4.5 dBm
Analog Bandwidth Full power bandwidth (–3 dB) 5 GHz
Return Loss (RL) 3 Up to 4 GHz –10 dB
Up to 5 GHz –8 dB
On-die Termination Single-ended on-die termination to external 2.5V/3V VDAC_AVTT 50 Ω
Crosstalk isolation between channels 4 FOUT = 240 MHz –70 dBc
FOUT = 1.9 GHz –70 dBc
FOUT = 2.4 GHz –70 dBc
FOUT = 3.5 GHz –70 dBc
FOUT = 4.2 GHz –69 dBc
FOUT = 4.9 GHz –67 dBc
  1. RF-DAC sampling rate is 6.554 GS/s using external sampling clock.
  2. Typical values are specified at nominal voltage, Tj = 25°C.
  3. This is the return loss of the worst case channel quoted from DC to a specified frequency point. Consult the S parameter I/O files for further details as input characteristics depend on differential I/O selection. The RL reference plan is closed to the BGA footprint, keeping two times the BGA pitch distance from ball contact to avoid micro-probing electromagnetic disturbance.
  4. Values represent two channel crosstalk worst-case values for any combination of channel selections.
Table 3. RF-DAC Electrical Characteristics for ZU4xDR Devices
Parameter Comments/Conditions 1 Min Typ 2 Max Units
Analog Outputs
Resolution   14 Bits
Sample rate 3 -2E, -2I, -2LI speed grade without clock forwarding,

datapath modes 2, 3, and 4

0.5 9.85 GS/s
-2E, -2I, -2LI speed grade with clock forwarding,

datapath modes 2, 3, and 4

0.5 9.70 GS/s
-1E, -1I, -1LI, -1M speed grade, datapath modes 2, 3, and 4 0.5 8.92 GS/s
All speed grades, datapath mode 1 0.5 7.0 GS/s
Maximum output power VDAC_AVTT = 3.0V, 100Ω termination, signal frequency <200 MHz –18.5 6.5 dBm
Output current range AC coupling: VDAC_AVTT = 3.0V, 100Ω termination, signal frequency <200 MHz 2.25 40.5 mA
DC coupling: VDAC_AVTT = 3.0V, 100Ω termination, signal frequency <200 MHz 6.4 32 mA
Variable output current step size   43.75 μA

Variable output power range

Equivalent dynamic range from output current range 4

At 240 MHz 24 dB
At 3500 MHz 20 dB
At 4900 MHz 18 dB
At 5900 MHz 17 dB
Analog bandwidth Full power bandwidth (–3 dB) 6 GHz
Return loss (RL) 5 Up to 4 GHz –12 dB
Up to 6 GHz –10 dB
On-die termination Single-ended on-die termination to external 3V VDAC_AVTT 50 Ω
Crosstalk isolation between channels 6 FOUT = 0–4 GHz –75 dBc
FOUT = 0–6 GHz –70 dBc
  1. RF-DAC sampling rate is the highest rate using external sampling clock.
  2. Typical values are specified at nominal voltage, Tj = 40°C.
  3. See the Zynq UltraScale+ RFSoC RF Data Converter LogiCORE IP Product Guide (PG269) for additional information on datapath modes.
  4. The variable output power effective dynamic range depends on the signal frequency that is shown in the equivalent dynamic range. The specification is supplied for AC coupling mode. A derating of 12 dB is applied for DC coupling mode.
  5. This is the return loss of the worst case channel quoted from DC to a specified frequency point. Consult the S parameter I/O files for further details as input characteristics depend on channel and package selection. The RL reference plan is closed to the BGA footprint, keeping two times the BGA pitch distance from ball contact to avoid micro-probing electromagnetic disturbance.
  6. Values represent two channel crosstalk worst-case values for any combination of channel selections. This specification is only characterized on XCZU46DR-H1760.
Table 4. RF-DAC Electrical Characteristics for ZU6xDR Devices
Parameter Comments/Conditions 1 Min Typ 2 Max Units
Analog Outputs
Resolution 14 Bits
Sample rate 3 -2I speed grade without clock forwarding, datapath modes 2, 3, and 4 0.5 10 GS/s
-2I speed grade with clock forwarding, datapath modes 2, 3, and 4 0.5 9.85 GS/s
-2LI speed grade without clock forwarding, datapath modes 2, 3, and 4 0.5 9.85 GS/s
-2LI speed grade with clock forwarding, datapath modes 2, 3, and 4 0.5 9.70 GS/s
-1I, -1LI, -1M speed grade, datapath modes 2, 3, and 4 0.5 8.92 GS/s
All speed grades, datapath mode 1 0.5 7.0 GS/s
Maximum output power VDAC_AVTT = 3.0V, 100Ω termination, signal frequency <200 MHz –18.5 6.5 dBm
Output current range AC coupling: VDAC_AVTT = 3.0V, 100Ω termination, signal frequency <200 MHz 2.25 40.5 mA
DC coupling: VDAC_AVTT = 3.0V, 100Ω termination, signal frequency <200 MHz 6.4 32 mA
Variable output current step size   43.75 μA

Variable output power (VOP) range

Equivalent dynamic range from output current range 4

At 240 MHz 24 dB
At 3500 MHz 20 dB
At 4900 MHz 18 dB
At 5900 MHz 17 dB
At 6900 MHz 15.5 dB
Analog bandwidth Full power bandwidth (–3 dB) 7.125 GHz
Return loss (RL) 5 Up to 4 GHz –12 dB
Up to 7.125 GHz –10 dB
On-die Termination Single-ended on-die termination to external 3V VDAC_AVTT 50 Ω
Crosstalk isolation between channels 6 FOUT = 0–4 GHz –69 dBc
FOUT = 0–7.125 GHz –63 dBc
  1. RF-DAC sampling rate is the highest rate using external sampling clock.
  2. Typical values are specified at nominal voltage, Tj = 40°C.
  3. See the Zynq UltraScale+ RFSoC RF Data Converter LogiCORE IP Product Guide (PG269) for additional information on datapath modes.
  4. The variable output power effective dynamic range depends on the signal frequency that is shown in the equivalent dynamic range. The specification is supplied for AC coupling mode. A derating of 12 dB is applied for DC coupling mode.
  5. This is the return loss of the worst case channel quoted from DC to a specified frequency point. Consult the S parameter I/O files for further details as input characteristics depend on channel and package selection. The RL reference plan is closed to the BGA footprint, keeping two times the BGA pitch distance from ball contact to avoid micro-probing electromagnetic disturbance.
  6. Values represent two channel crosstalk worst-case values for any combination of channel selections. This specification is only characterized on the XCZU67DR-E1156.