1. Products
  2. RF and Microwave
  3. Phase Locked Loop (PLL) Synthesizer & Translation Loop
  4. Fractional-N PLL
  5. HMC778

Alternative Parts


Features and Benefits

  • RF Bandwidth: 9.6 GHz to 10.8 GHz
  • Fractional or Integer Modes
  • Ultra Low Phase Noise
    10.2 GHz; 50 MHz Ref.
    -106 / -102 dBc/Hz @ 10 kHz
    (Int / frac)
    -140 dBc/Hz @ 1 MHZ (Open Loop)
  • Figure of Merit (FOM)
    -230 / -227 dBc/Hz (int / Frac).
  • 350 MHz, 14-bit reference path input
  • Frequency And Phase Modulation
  • Integrated Frequency Sweeper
  • Triggered Frequency Hopping
  • External Triggering
  • 40 Lead 6 x 6 mm SMT Package: 36 mm²

Product Details

The HMC778LP6CE is a fully functioned Fractional-N Phase-Locked-Loop (PLL) Frequency Synthesizer with an integrated Voltage Controlled Oscillator (VCO). The input reference frequency range is DC to 350 MHz while the advanced delta-sigma modulator design in the fractional synthesizer allows both ultra-fine step sizes and very low spurious products. The highly integrated structure provides excellent phase noise performance over temperature, shock and process. In addition, the HMC778LP6CE offers frequency sweep and modulation features, external triggering, double-buffering, exact frequency control, phase modulation and more. The HMC778LP6CE is packaged in a leadless QFN 6 x 6 mm surface mount package.

For theory of operation and register map refer to the "PLLs w/ Integrated VCO - Microwave VCOs" Operating Guide.


  • VSAT Radio
  • Microwave Point-To-Point Radios
  • Test Equipment & Industrial Control
  • Military End-Use
  • Phased Array Applications
  • FMCW Radar Systems

Product Lifecycle icon-not-recommended Last Time Buy

All products in this family will be obsolete soon. Please contact ADI Sales or Distributors to arrange for final purchases and read our Obsolescence Information to review the time periods for placing final orders and receiving final shipments.

Tools & Simulations

Design Tool


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

HMC778 Companion Parts

Recommended Loop Filter Op Amps

Recommended Reference Buffer

  • With integrated filters for improved noise: LTC6957.

Recommended Reference Clean Up PLL

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.View our quality and reliability program and certifications for more information.

Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
HMC778LP6CE Material Declaration Reliability Data 40-Lead QFN (6mm x 6mm w/ EP)
HMC778LP6CETR Material Declaration Reliability Data 40-Lead QFN (6mm x 6mm w/ EP)
Wafer Fabrication Data

PCN-PDN Information

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Sample & Buy

Ordering FAQs

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Buy Now Pricing

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List Pricing

(*)The 1Ku list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


Lead Times

Please see the latest communication from our CCO regarding lead times.



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Price Table Help


Evaluation Boards

Pricing displayed is based on 1-piece.

Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.

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.