1. Products
  2. Clock and Timing
  3. Clock Generation and Distribution
  4. Clock Generation Devices
  5. LTC6952


Features and Benefits

  • JESD204B/C, Subclass 1 SYSREF Signal Generation
  • Low Noise Integer-N PLL
  • Additive Output Jitter < 6fsRMS
    • (Integration BW = 12kHz to 20MHz, f = 4.5GHz)
  • Additive Output Jitter 65fsRMS (ADC SNR Method)
  • EZSync, ParallelSync Multichip Synchronization
  • –229dBc/Hz Normalized In-Band Phase Noise Floor
  • –281dBc/Hz Normalized In-Band 1/f Noise
  • Eleven Independent, Low Noise Outputs with Programmable Coarse Digital and Fine Analog Delays
  • Flexible Outputs Can Serve as Either a Device Clock or SYSREF Signal
  • Reference Input Frequency up to 500MHz
  • LTC6952Wizard Software Design Tool Support
  • –40ºC to 125°C Operating Junction Temperature Range

Product Details

The LTC6952 is a high performance, ultralow jitter, JESD204B/C clock generation and distribution IC. It includes a Phase Locked Loop (PLL) core, consisting of a reference divider, phase-frequency detector (PFD) with a phase-lock indicator, ultralow noise charge pump and integer feedback divider. The LTC6952’s eleven outputs can be configured as up to five JESD204B/C subclass 1 device clock/SYSREF pairs plus one general purpose output, or simply eleven general purpose clock outputs for non-JESD204B/C applications. Each output has its own individually programmable frequency divider and output driver. All outputs can also be synchronized and set to precise phase alignment using individual coarse half-cycle digital delays and fine analog time delays.

For applications requiring more than eleven total outputs, multiple LTC6952s can be connected together using the EZSync or ParallelSync synchronization protocols.


  • High Performance Data Converter Clocking
  • Wireless Infrastructure
  • Test and Measurement

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 (4)

Tools & Simulations


Linduino is Analog Devices’ Arduino compatible system for developing and distributing firmware libraries and example code for our integrated circuits. Each Linduino-supported product includes an example main program, defined in the LTSketchbook/Part Number folder and driver code, defined in the LTSketchbook/libraries folder.

Linduino code repository on GitHub and instructions on how to use the code.

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IBIS Models

Design Tools

LTC6952 Wizard

The LTC6952Wizard software provides appropriate LTC6952 and LTC6953 devices settings and LTC6952 loop filter component values with a click of a button. Different system scenarios may be tried, and then each output’s time-domain waveform and frequency-domain phase noise and jitter may be plotted.

Product Recommendations

LTC6952 Companion Parts

Recommended Clock Distribution Device

Recommended Reference Buffer

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
LTC6952IUKG#PBF Material Declaration Reliability Data 52-Lead QFN (7mm x 8mm x 0.75mm w/ EP)
LTC6952IUKG#TRPBF Material Declaration Reliability Data 52-Lead QFN (7mm x 8mm x 0.75mm w/ EP)
Wafer Fabrication Data

Support & Discussions

LTC6952 Discussions

HMC7044 VS LTC6952
4 week(s) ago in Clock and Timing
RE: ADF4377 reference
5 week(s) ago in RF and Microwave
RE: LTC6952 Shutdown Time?
5 week(s) ago in Clock and Timing

Sample & Buy

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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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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.