Analog Devices Inc. AD9739A-EBZ

Overview

AD9739A-EBZ from Analog Devices is a high-speed evaluation board for the AD9739A 14-bit, 2.5 GSPS RF digital-to-analog converter. It enables direct RF synthesis from DC to 3 GHz in baseband or mix-mode operation, supports dual-port LVDS DDR data interface up to 1.25 GSPS per port, and delivers programmable differential output current (8.7–31.7 mA) with 1.1 W power consumption at full rate. It is used for broadband communications, DOCSIS CMTS, radar, and instrumentation prototyping.

For engineers reviewing the AD9739A-EBZ datasheet, AD9739A-EBZ pinout, AD9739A-EBZ application, or AD9739A-EBZ equivalent, this page provides verified functional context, supply support details, manufacturer background, and targeted FAQs-covering evaluation setup, clocking architecture, DAC core integration, SPI configuration, and thermal management for RF signal generation systems.

Technical Context

The AD9739A-EBZ implements a complete reference design for the AD9739A TxDAC® core, including on-board 2.5 GHz DACCLK distribution, dual LVDS data receivers, DCI/DCO clock forwarding, and analog output filtering optimized for 1.25 GHz baseband or 1.25–3.0 GHz mix-mode operation. It integrates a 1.2 V reference generator (I120/VREF), precision decoupling, and impedance-matched 100 Ω differential termination for DCO and DCI signals.

Board-level features include source-synchronous DDR timing alignment via DLL-controlled data latches, SPI-configurable DAC registers (e.g., IOUTFS, quad-switch mode), IRQ-driven status monitoring, and thermal vias aligned to the 160-ball CSP_BGA footprint of the AD9739A. Power delivery uses separate 1.8 V (VDDC/VDD) and 3.3 V (VDDA/VDD33) rails with low-noise LDOs and ferrite-bead filtering.

Key Specifications

Availability

AD9739A-EBZ is available at Aetrix Electronics and suitable for RF prototyping, DOCSIS CMTS development, military jammer testing, and high-speed instrumentation requiring stable component supply and traceable evaluation hardware.

Supply support for AD9739A-EBZ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and RF ICs, headquartered in Norwood, MA, with design centers worldwide and a focus on precision signal processing.

The AD9739A-EBZ belongs to Analog Devices' TxDAC® evaluation platform family, engineered specifically to accelerate RF DAC integration in wideband communications, defense EW systems, and automated test equipment where spectral purity and timing fidelity are critical.

FAQ

What is the primary function of the AD9739A-EBZ evaluation board?

The AD9739A-EBZ is a fully populated, ready-to-use evaluation platform for the AD9739A 14-bit, 2.5 GSPS RF DAC. It provides all necessary clocking, power regulation, LVDS interface conditioning, analog output filtering, and SPI configuration circuitry to validate the DAC's performance in real-world RF signal synthesis applications-including baseband and mix-mode operation up to 3 GHz. The board enables rapid characterization without custom PCB design.

Does the AD9739A-EBZ support both baseband and mix-mode RF synthesis?

Yes, the AD9739A-EBZ supports both modes as enabled by the underlying AD9739A DAC. In baseband mode, it synthesizes signals from DC to 1.25 GHz; in mix-mode, it operates from 1.25 GHz to 3.0 GHz using its proprietary quad-switch architecture. The board's layout preserves signal integrity for both configurations, including matched-length LVDS traces and optimized analog output path routing to minimize spurious content.

How is clock synchronization managed on the AD9739A-EBZ?

The AD9739A-EBZ uses the AD9739A's integrated DLL-based data receiver controller to align incoming LVDS data with the internal DACCLK domain. It accepts a differential DCI clock input and outputs a phase-aligned DCO signal for source-synchronous capture. This eliminates external FIFOs and ensures deterministic latency-critical for coherent multi-carrier DOCSIS or radar waveform generation using the AD9739A-EBZ.

Can the AD9739A-EBZ be used with FPGA development kits?

Yes-the AD9739A-EBZ features a standard 2×25-pin Samtec QSH connector compatible with common FPGA carrier boards (e.g., Xilinx Kintex/Virtex, Intel Stratix). Its dual-port LVDS interface, 1.25 GSPS per port capability, and DDR source-synchronous timing align directly with modern FPGA I/O banks. Reference HDL examples and timing constraints are provided in Analog Devices' UG-427 user guide for the AD9739A-EBZ.

What power supply requirements does the AD9739A-EBZ have?

The AD9739A-EBZ requires three regulated DC supplies: +3.3 V @ ≥1 A (for VDDA/VDD33), +1.8 V @ ≥0.5 A (for VDDC/VDD), and a clean analog ground plane. On-board LDOs condition these inputs, but optimal performance demands low-noise, ripple-free sources-especially for VDDA and VDDC, which directly impact SFDR and NSD. The board includes test points for each rail and thermal monitoring diodes near the AD9739A die.