Xilinx XCZU47DR-2FFVE1156I Datasheet & Specs: Zynq UltraScale+ RFSoC Gen3

The XCZU47DR-2FFVE1156I is a third-generation (Gen3) AMD Zynq UltraScale+ RFSoC that puts eight 14-bit RF-ADCs (up to 5 GSPS), eight 14-bit RF-DACs (up to 9.85 GSPS), a quad-core Arm Cortex-A53 plus dual-core Cortex-R5F processing system, and roughly 930K logic cells of programmable fabric on one 16 nm die. It ships in a 35 x 35 mm, 1156-ball flip-chip BGA (FFVE1156) at the -2 speed grade and industrial (-40 to +100 C TJ) temperature range. In short: it is a complete direct-RF-sampling software-defined radio on a chip — and the hard part isn’t the silicon, it’s laying out and assembling the board around it.

XCZU47DR-2FFVE1156I Key Specs at a Glance

• Family / generation: AMD Zynq UltraScale+ RFSoC, Gen3, 16 nm FinFET+
• RF-ADC: 8 channels, 14-bit, up to 5 GSPS, with digital down-converters (DDC)
• RF-DAC: 8 channels, 14-bit, up to 9.85 GSPS, with digital up-converters (DUC)
• RF input frequency: up to 6 GHz direct sampling
• SD-FEC: none on the -47DR (this is the main split vs the -48DR)
• Processing system: quad Arm Cortex-A53 up to 1.333 GHz + dual Cortex-R5F up to 533 MHz
• Programmable logic: ~930K system logic cells, ~425K CLB LUTs, ~4,272 DSP slices
• Transceivers: 16 GTY (28 Gb/s-class) + 4 PS-GTR; PCIe Gen3 x16 / Gen4 x8 (PCIE4C, CCIX)
• Package: FFVE1156, 35 x 35 mm lidded flip-chip BGA, 1156 balls, 1.0 mm pitch
• Speed grade / temp: -2 (high performance), industrial -40 to +100 C junction

What Is the XCZU47DR-2FFVE1156I?

The XCZU47DR-2FFVE1156I belongs to AMD’s (formerly Xilinx) RFSoC line — the part of the Xilinx Fpga portfolio that monolithically integrates the data converters that a radio system would normally place in separate ADC/DAC chips. The “DR” in the part number marks it as a data-converter device. Where a conventional design routes a high-speed JESD204 link between an FPGA and an external converter, this device samples RF directly on-die, then hands the samples straight to the fabric.

Around those converters sits a full heterogeneous compute platform: a quad-core Cortex-A53 application processor for Linux and control, a dual-core Cortex-R5F for hard-real-time tasks, and UltraScale+ programmable FPGA fabric (~930K logic cells, ~4,272 DSP slices) for the signal-processing chain. That combination is why you see this device in 5G radios, phased-array and digital-array radar, satellite communications, cable (DOCSIS) access, and test-and-measurement gear.

The payoff is integration. AMD quotes up to roughly 50-75% system power and footprint reduction versus a discrete FPGA-plus-converter approach, mostly because you delete the power-hungry FPGA-to-converter serial interfaces. That same integration is what makes the PCB underneath it unforgiving — analog converter rails, clock distribution, and a 1156-ball escape now all live under one BGA.

XCZU47DR-2FFVE1156I Full Specifications Table

Verified against the AMD Zynq UltraScale+ RFSoC data sheet (DS889 overview / DS926 switching characteristics) and distributor datasheets. Where a value is configuration-dependent, the maximum is shown.

Parameter	XCZU47DR-2FFVE1156I
Device family	Zynq UltraScale+ RFSoC (Gen3)
Process node	16 nm FinFET+
System logic cells	~930,300
CLB LUTs / flip-flops	~425,280 / ~850,560
DSP slices	~4,272 (27×18 multipliers)
Application processor (APU)	Quad-core Arm Cortex-A53, up to 1.333 GHz, NEON + FPU, 1 MB L2
Real-time processor (RPU)	Dual-core Arm Cortex-R5F, up to 533 MHz, with TCM
RF-ADC	8 x 14-bit, up to 5 GSPS, with DDC
RF-DAC	8 x 14-bit, up to 9.85 GSPS, with DUC
RF input frequency (max)	6 GHz
SD-FEC blocks	0 (none on the 47DR)
Serial transceivers	16 GTY (28 Gb/s-class) + 4 PS-GTR (up to 6 Gb/s)
PCIe / CCIX	PCIE4C: PCIe Gen3 x16 / Gen4 x8, CCIX
External memory	DDR4 / DDR3 / LPDDR4 / LPDDR3; Quad-SPI, NAND, eMMC; 256 KB OCM w/ ECC
PS connectivity	214 PS I/O; UART, CAN, USB 2.0/3.0, I2C, SPI, GbE/SGMII, GPIO, RTC, WDT
Security	CSU secure boot, 256-bit AES-GCM, SHA-384, RSA; System Monitor (up to 17 ext. analog inputs)
Package	FFVE1156, lidded flip-chip BGA, 35 x 35 mm, 1156 balls, 1.0 mm pitch
Speed grade	-2 (highest standard performance tier)
Temperature grade	Industrial (I): -40 C to +100 C junction (TJ)
Design tools	AMD Vivado (hardware), Vitis (software / acceleration)

How to Decode the XCZU47DR-2FFVE1156I Part Number

Every field in the ordering code maps to a real spec. Reading it correctly stops you from quoting the wrong speed grade or temperature class — a common and expensive sourcing mistake.

Segment	Value	Meaning
XC	XC	AMD/Xilinx commercial product prefix
ZU	Zynq UltraScale+	Architecture family
47	47	Device size / member within the RFSoC family
DR	Data converter (RFSoC)	Integrated RF-ADC / RF-DAC subsystem
-2	Speed grade -2	Higher-performance grade (vs -1); -2 > -1 on fMAX
FFVE	Package code	Lidded flip-chip fine-pitch BGA, Pb-free
1156	1156 balls	35 x 35 mm body, 1.0 mm ball pitch
I	Industrial	-40 C to +100 C junction temperature

Two fields decide most of your BOM cost and risk. The -2 speed grade buys peak fabric and converter performance but costs more than a -1, and an -2LI low-static-power screen exists if power, not raw speed, is your constraint. The I (industrial) grade guarantees -40 to +100 C junction operation — if your enclosure runs hot or cold, this is the field that protects you, and it is not the same as the extended/E commercial grade.

RF-ADC and RF-DAC: How the Direct-Sampling Signal Chain Works

The defining feature of the XCZU47DR-2FFVE1156I is direct RF sampling. Each RF-ADC tile digitizes the antenna-side signal without a discrete down-conversion stage, and each RF-DAC tile can synthesize RF directly. Both sides carry hardened DDCs and DUCs with programmable decimation/interpolation, an NCO, and a complex mixer, so a large slice of the radio moves into the digital domain.

Concrete numbers worth committing to memory: 14-bit converters, RF-ADC sampling up to 5 GSPS, RF-DAC up to 9.85 GSPS, and useful operation across input frequencies to 6 GHz. The on-chip data path to fabric runs over AXI4-Stream up to 512 bits wide, configured as real or I/Q.

Here’s the counterintuitive part. Deleting the JESD204 link removes one of the nastiest signal-integrity problems on a radio board — but it doesn’t make the board easier. The difficulty relocates into the converter clock and reference network: clock jitter that JESD204 would have tolerated now lands directly on your SFDR and noise floor. A clean RF-DAC at 9.85 GSPS is far more sensitive to its sampling-clock phase noise and its DAC_AVTT termination supply than to anything in the FPGA fabric.

Second non-obvious point: faster converters do not automatically mean more channels at full rate. The 5 GSPS RF-ADC figure applies when the RF I/O of a tile are fully used; partition your channels per tile early, because a late re-map can move ball assignments and force a board respin.

XCZU47DR vs XCZU48DR vs XCZU49DR: Choosing the Right RFSoC Gen3

These three Gen3 parts look almost identical on a line-card and share package footprints, which is exactly how teams order the wrong one. The deciding factor is usually SD-FEC and converter count, not logic.

Feature	XCZU47DR	XCZU48DR	XCZU49DR
14-bit RF-ADC (max GSPS)	8 @ 5	8 @ 5	16 @ 2.5
14-bit RF-DAC (max GSPS)	8 @ 9.85	8 @ 9.85	16 @ 9.85
SD-FEC blocks	0	8	0
RF input freq (max)	6 GHz	6 GHz	6 GHz
System logic cells	~930K	~930K	~930K
Typical fit	T&M, SATCOM, radar IF	5G NR / DOCSIS needing hardened LDPC	High-channel-count MIMO / DAR

The trade-off in one line: if your system needs hardened LDPC/turbo forward error correction for 5G NR or DOCSIS, you need the XCZU48DR’s eight SD-FEC cores — the XCZU47DR has none, and emulating FEC in fabric burns DSP and power. If you don’t need FEC (test-and-measurement, SATCOM, radar IF), the 47DR is the cost-right choice. The 49DR doubles converter count for dense MIMO but halves per-tile ADC rate to 2.5 GSPS.

Layout lever worth knowing: the 47DR and 48DR are broadly footprint-compatible within FFVE1156, so a single board can be populated with either depending on whether you need FEC. Confirm ADC/DAC bank and power-rail differences against AMD’s migration guidelines before you commit copper — “broadly compatible” is not “drop-in.”

PCB Design Rules for the 1156-Ball RFSoC Flip-Chip BGA

This is where a distributor datasheet stops and a fab/EMS partner starts. A 35 x 35 mm, 1.0 mm-pitch, 1156-ball flip-chip BGA carrying 6 GHz analog is not a board you route on a default 4-layer stack-up.

• Stack-up and layer count: plan for a high-layer-count build (commonly 12-16+ layers) to escape 1156 balls and isolate the converter analog rails from PL switching noise. A dedicated, low-impedance ground reference adjacent to every high-speed signal layer is the price of entry.
• Controlled impedance: hold 50 ohm single-ended and 100 ohm differential to a real tolerance — specify +/-10% for general nets and tighten to +/-5% on the GTY lanes and clock distribution. “Controlled impedance” with no number on the fab drawing is not a spec.
• RF material choice: standard FR-4 (Dk ~4.3, Df ~0.02) is fine for control and lower-speed nets, but at multi-GHz it bleeds signal. As a rule of thumb, FR-4 runs on the order of ~0.8 dB/inch insertion loss near 10 GHz while a low-loss laminate such as Rogers 4350B (Dk ~3.48, Df ~0.0037) sits nearer ~0.3 dB/inch. Use a hybrid stack-up: low-loss material only on the RF layers, FR-4 elsewhere, to control cost.
• Via strategy: 1.0 mm pitch with this ball count typically forces via-in-pad with filled-and-capped microvias for the inner rows, plus back-drilling on the GTY lanes to kill stub resonance. Laser-drilled microvias and an HDI build are the realistic path to escape, not through-hole-only.
• Surface finish: ENIG is the default for fine-pitch BGA flatness and shelf life; it gives a planar, solderable surface that HASL cannot match at 1.0 mm pitch.
• Power integrity / decoupling: the converter supplies (ADC/DAC AVCC, AVCCAUX, the DAC AVTT termination rail) want tight, low-ESL decoupling placed directly under the relevant balls. Treat each analog rail as its own quiet island with a deliberate return path, not a tap off the digital plane.

Fab class matters here. For deployed radio and radar hardware, build to IPC-6012 Class 3 (high-reliability) rather than Class 2, and call out the impedance and material requirements explicitly on the fabrication notes per IPC-2221 generic design rules. The cost delta from Class 2 to Class 3 is real, but so is a field failure in a phased-array node.

Assembly and DFM Checklist for the FFVE1156 Package

The FFVE1156 is a lidded flip-chip BGA — you mount your heatsink to the metal lid through a thermal interface material, and the die-to-lid path dominates junction temperature. That single fact drives both the thermal and the assembly plan. Run through this before you release the board:

1. Confirm temperature grade against your environment. The industrial -40 to +100 C TJ rating is a junction limit, not an ambient one; budget the thermal path from junction through lid through heatsink to air.
2. Match the reflow profile to the package and MSL. Follow J-STD-020 for moisture-sensitivity handling and bake-out, and keep peak reflow within the device’s rated maximum. A 1156-ball flip-chip part is moisture-sensitive — skipping the bake invites popcorning.
3. Balance copper under the BGA. Heavy, unrelieved ground planes pull heat away during reflow unevenly and cause head-in-pillow on the 1.0 mm-pitch balls. Use thermal relief and balanced copper so the inner balls reach reflow with the outer ones.
4. Inspect with X-ray, not just AOI. Optical AOI cannot see the inner ball rows under a 35 x 35 mm BGA. 100% X-ray (2D, with 2.5D/CT on first articles) is how you catch voiding, bridging, and open joints you otherwise ship blind.
5. Grade your acceptance criteria. Inspect solder joints to IPC-A-610 Class 3 and assemble to J-STD-001 Class 3 for high-reliability RF hardware. Reference IPC-7095 for BGA-specific design and process guidance.
6. Plan the thermal interface, not just the heatsink. Because the lid-to-die interface dominates, beyond a point a bigger fin stack just cools the lid; airflow across the lid and TIM quality move the junction more than fin mass.

Real-world case: a test-and-measurement client passed bring-up but saw marginal RF-DAC spurious-free dynamic range on first articles. The converter wasn’t the problem — the DAC termination supply shared a plane with switching nets and lacked dedicated under-ball decoupling. A two-layer stack-up change and a re-spin of the decoupling fixed it; catching it at DFM review would have saved a board turn and three weeks.

XCZU47DR-2FFVE1156I Design Actions to Take This Week

• Lock your channel-to-tile mapping for the RF-ADC/RF-DAC before routing; a late change moves ball assignments.
• Put a real impedance number (+/-5% on GTY and clocks) and a named laminate on the fab drawing — never just “controlled impedance.”
• Decide -47DR vs -48DR by answering one question: do you need hardened SD-FEC? If yes, you’re on the 48DR.
• Specify IPC-6012 Class 3 fab and IPC-A-610 Class 3 assembly up front if this is deployed RF hardware.
• Send your stack-up and converter power rails through a DFM review before you commit to the first build.

Frequently Asked Questions About the XCZU47DR-2FFVE1156I

Is the XCZU47DR-2FFVE1156I a Gen2 or Gen3 RFSoC?

It is a third-generation (Gen3) Zynq UltraScale+ RFSoC. Gen3 raised the RF-ADC sampling to 5 GSPS and the RF-DAC to 9.85 GSPS, with input frequency support to 6 GHz — a step up from the Gen1 12-bit / 4 GSPS converters.

How many RF-ADC and RF-DAC channels does the XCZU47DR have?

Eight 14-bit RF-ADCs (up to 5 GSPS) and eight 14-bit RF-DACs (up to 9.85 GSPS), each with hardened digital down/up-converters. That is the same converter count as the XCZU48DR; the XCZU49DR doubles it to sixteen of each.

What is the difference between the XCZU47DR and XCZU48DR?

The main difference is SD-FEC. The XCZU48DR includes eight soft-decision forward-error-correction cores for LDPC/turbo (5G NR, DOCSIS); the XCZU47DR has none. Logic, processors, and converter counts are otherwise comparable, and they share the FFVE1156 footprint family.

What does the FFVE1156 package look like physically?

It is a lidded flip-chip fine-pitch BGA: a 35 x 35 mm body with 1156 balls on a 1.0 mm pitch and a metal lid for heatsinking. The related FSVE1156 is the lidless, stiffener-ring version intended for direct-to-die cooling.

What is the operating temperature of the XCZU47DR-2FFVE1156I?

The trailing “I” denotes industrial grade: a -40 C to +100 C junction temperature (TJ) range. Plan your heatsink and airflow to keep the junction inside that window under worst-case load, not just ambient.

What software is used to design with the XCZU47DR?

AMD Vivado handles the hardware/FPGA design and the RF Data Converter IP configuration; Vitis covers embedded software and acceleration for the Arm cores. The RF converter blocks are configured through dialog-driven IP in the Vivado catalog.

What applications use the XCZU47DR-2FFVE1156I?

Test-and-measurement instruments, satellite communications, phased-array and digital-array radar, 5G/MIMO radio IF stages, and cable (DOCSIS) access. It suits systems that need wideband direct RF sampling without external converters and don’t require hardened FEC.

Building Your XCZU47DR-2FFVE1156I Board With PCBSync

The XCZU47DR-2FFVE1156I gives you a complete direct-sampling radio on one die — but the ranking question for any team is whether the board underneath survives 6 GHz analog, a 1156-ball HDI escape, and Class 3 assembly. That is exactly the handoff where most distributor pages go quiet and a fab/EMS partner earns its keep. Send your Gerber and BOM for a DFM review and a quote, and we’ll pressure-test the stack-up, impedance, and thermal plan before you commit to the first build.