Alternative Parts


Features and Benefits

  • Wide output frequency range: 9.85 GHz to 20.5 GHz
  • Wide tuning bandwidth
  • Low single sideband phase noise: −83 dBc/Hz at 100 kHz offset
  • No external resonator needed
  • Supply current: 70 mA typical at VCC = 5 V
  • 24-terminal, 3.90 mm × 3.90 mm, ceramic LCC package

Product Details

The ADF5709 wideband, monolithic microwave integrated circuit (MMIC), voltage controlled oscillator (VCO) supports an output frequency (fOUT) range of 9.85 GHz to 20.5 GHz while maintaining −83 dBc/Hz phase noise at 100 kHz offset without subharmonic tones. The wide frequency tuning range and low phase noise allow phase-locked loop (PLL) solutions for a variety of frequency bands and limit the need for multiple narrow-band VCOs. The broad frequency coverage reduces the board design complexity and simplifies the bill of materials when designing RF and microwave applications.

The VCO operates from a single 5 V supply and consumes only 70 mA of supply current that results in minimal power dissipation. The ADF5709 low power consumption is ideal for high performance applications with limited or no airflow. The monolithic construction of the VCO allows optimal output power and noise characteristics over temperature variations.

The VCO is fully integrated and incorporates a resonator, a negative resistance device, and a varactor diode that minimize the number of external components and reduces board space.

The low input impedance on the VTUNE pin of the ADF5709 enables high tuning speed and modulation bandwidth, which allows faster frequency sweeps and lock times when used as part of a frequency synthesizer, for example, in radar or in test and measurement applications.

The ADF5709 is encapsulated into a tiny, 3.90 mm × 3.90 mm, RoHS compliant, ceramic leadless chip carrier (LCC) package. The package includes through vias to the exposed pad, enhancing thermal characteristics.

The small size, optimal noise performance, low power consumption, and wide tuning range of the ADF5709 make the device ideal for many applications requiring flexibility, high performance, a small footprint, and a tight power budget. The ADF5709 is pin to pin compatible with the HMC733 and other Analog Devices, Inc., wideband VCOs.


  • Industrial and medical equipment
  • Test and measurement equipment
  • Military radars, electronic warfare (EW), and electronic countermeasures (ECMs)
  • Point to point and multipoint radios
  • Very small aperture terminals (VSATs)
  • Wireless communication infrastructure

Product Lifecycle icon-recommended Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Evaluation Kits (2)

Tools & Simulations

Design Tools


ADIsimPLL enables the rapid and reliable evaluation of new high performance PLL products from ADI. It is the most comprehensive PLL Synthesizer design and simulation tool available today. Simulations performed include all key non-linear effects that are significant in affecting PLL performance. ADIsimPLL removes at least one iteration from the design process, thereby speeding the design- to-market.

Product Recommendations

ADF5709 Companion Parts

Recommended LDO

  • 800 mA, Ultra Low Noise/High PSRR LDO: ADM7150.
  • 20V, 200 mA, Ultralow Noise, Ultrahigh PSRR RF Linear Regulator: LT3042.

Recommended Phase Locked Loop (PLL)

  • 14 GHz 16-bit Fractional-N PLL with Sweeper: HMC702.
  • 26.5 GHz, Integer N/Fractional-N, PLL Synthesizer: ADF41513.

Recommended Active Loop Filter Op Amps

  • High Performance, 145 MHz FastFETOp Amps: AD8065.

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.