Analog Devices Inc. EV-ADF5709

Overview

EV-ADF5709 from Analog Devices is an evaluation board for the ADF5709 wideband MMIC VCO, enabling rapid prototyping of 9.85 GHz to 20.5 GHz local oscillator circuits in microwave synthesizers. It supports phase noise as low as −83 dBc/Hz at 100 kHz offset, delivers up to +2 dBm RF output power, and operates from a single 5 V supply with 70 mA typical current draw - ideal for radar, test equipment, and VSAT design validation.

For engineers reviewing the EV-ADF5709 datasheet, EV-ADF5709 pinout, EV-ADF5709 application, or EV-ADF5709 equivalent, this board provides verified RF layout, calibrated tuning interface, thermal management for the E-24-2 LCC package, and direct integration with PLL synthesizers like the ADF41513 - critical for evaluating VCO pulling, pushing, modulation bandwidth, and loop stability in high-frequency systems.

Technical Context

The EV-ADF5709 implements a complete reference design for the ADF5709 VCO, including optimized VTUNE filtering (1.4 pF–13.6 pF network), low-noise 5 V LDO support (compatible with ADM7150/LT3042), and 50 Ω RFOUT coupling with 100 nF DC blocking. It incorporates proper grounding via the exposed pad and four JEDEC vias per Analog Devices' thermal guidelines (θJC = 21.9°C/W).

This board enables characterization of key VCO behaviors: monotonic tuning sensitivity (220–870 MHz/V), supply pushing (−240 MHz/V at 20.5 GHz), harmonic suppression (−15 dBc second, −30 dBc third), and temperature-stable operation across −40°C to +85°C - all while maintaining ≤2.0:1 VSWR load integrity on RFOUT.

Key Specifications

Availability

EV-ADF5709 is available at Aetrix Electronics and suitable for microwave synthesizer development, radar LO validation, and wireless infrastructure RF front-end testing requiring stable component supply, full-characterization reference designs, and RoHS-compliant evaluation hardware.

Supply support for EV-ADF5709 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 deep expertise in precision signal processing and microwave solutions.

The EV-ADF5709 belongs to Analog Devices' RF & Microwave Evaluation Platform family, engineered specifically to accelerate time-to-test for wideband VCOs and PLL-based frequency synthesizers in defense, communications, and instrumentation applications.

FAQ

What is the primary function of the EV-ADF5709 evaluation board?

The EV-ADF5709 evaluation board is designed exclusively to validate and characterize the ADF5709 wideband MMIC VCO. It provides a fully laid-out, thermally optimized platform with calibrated VTUNE filtering, RFOUT coupling, and power conditioning - enabling engineers to measure phase noise, tuning linearity, output power, harmonics, and loop stability without custom PCB development. The EV-ADF5709 directly supports system-level integration with synthesizers such as the ADF41513.

Does the EV-ADF5709 include the ADF5709 IC, and what package does it use?

Yes, the EV-ADF5709 includes one mounted ADF5709BEZ device in the 24-terminal, 3.90 mm × 3.90 mm ceramic leadless chip carrier (LCC) package (E-24-2). The board implements the exact grounding, via structure, and exposed pad connection specified in the ADF5709 datasheet to ensure thermal performance (θJC = 21.9°C/W) and RF stability across −40°C to +85°C.

Can the EV-ADF5709 be used with other VCOs or synthesizers beyond the ADF5709 and ADF41513?

The EV-ADF5709 is purpose-built for the ADF5709 and not pin-compatible or electrically adaptable for other VCOs. However, its RFOUT and VTUNE interfaces follow industry-standard practices, allowing reuse of layout techniques (e.g., 50 Ω routing, decoupling values, grounding strategy) when designing with similar wideband MMIC VCOs. It is explicitly validated for use with the ADF41513 PLL synthesizer, including SPI control and lock detection integration.

What power supply requirements must be met to operate the EV-ADF5709 correctly?

The EV-ADF5709 requires a clean, low-noise 5 V DC supply capable of delivering ≥100 mA. Analog Devices recommends using high-PSRR, low-dropout regulators like the ADM7150 or LT3042 to minimize spurious injection into the ADF5709's VCC pin - critical for achieving the specified −83 dBc/Hz phase noise at 100 kHz offset. The board includes 27 pF and 12 pF decoupling capacitors plus a 20 Ω series resistor to further suppress supply noise.

How does the EV-ADF5709 support thermal management for the ADF5709 during extended operation?

The EV-ADF5709 implements the thermal design specified in the ADF5709 datasheet: the ceramic LCC's exposed pad is soldered to a solid copper ground plane with four standard JEDEC vias (0.3 mm diameter, 0.025 mm plating, 1.2 mm pitch), enabling θJC = 21.9°C/W performance. This configuration maintains junction temperatures below 119°C at TA = 85°C, ensuring reliability over 1 million hours MTTF and supporting continuous operation in convection-cooled test environments.