Multiple PLL combination reference design for <40-fs jitter (100-Hz to 100-MHz)
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Key Document


The TIDA-01346 design uses two LMX2594 synthesizers in combination to produce lower noise than is possible with just one. By combining the output of two synthesizers that are in phase, a theoretical 3 dB phase noise benefit is possible due to the output power being 6 dB higher while the noise power is only 3 dB higher. The LMX2594 is an ideal synthesizer for this application as it has a SYNC feature that allows it to have deterministic and repeatable phase as well as a programmable phase that can be used to correct for any phase error due to trace mismatches or any other factors.

  • 3 to 12.5 GHz Output Frequency
  • 40-fs rms Jitter at 9GHz (100 Hz to 100 MHz)

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Design Files

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TI Devices (1)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LMX2594  15-GHz wideband PLLatinum™ RF synthesizer with phase synchronization and JESD204B support  RF & microwave  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LMX2594 Download Download

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Technical documentation

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Data sheet (1)
Title Type Size (KB) Date
PDF 2417 17 Apr 2019
User guide (1)
Title Type Size (KB) Date
PDF 1210 13 Jun 2017
Design files (6)
Title Type Size (KB) Date
ZIP 3580 17 Apr 2017
ZIP 2760 17 Apr 2017
PDF 640 17 Apr 2017
PDF 145 17 Apr 2017
PDF 17 17 Apr 2017
PDF 184 17 Apr 2017

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