LTC6951IUHF#PBF

Clock Generators, PLLs, Frequency Synthesizers Overview

The LTC6951IUHF#PBF is an ultralow jitter multioutput clock synthesizer with an integrated voltage-controlled oscillator (VCO). It features a high-performance, low-noise integer-N Phase Locked Loop (PLL) that requires no external VCO components. The device provides five independent outputs: four low-noise CML signals and one LVDS signal. Each output has individual dividers and programmable delays for precise phase alignment. The standard LTC6951 supports output frequencies from 1.95MHz to 2.5GHz. It operates over a junction temperature range of –40°C to 105°C.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Output Jitter: 90fs RMS (12kHz to 20MHz integration bandwidth)
• Noise Floor: –165dBc/Hz at 250MHz; Normalized In-Band Phase Noise Floor of –229dBc/Hz
• Five Independent Outputs: Four CML and one LVDS, each with individual dividers and programmable delays
• Integrated VCO: Fully integrated low-noise VCO calibrated internally without external system support

Clock Generators, PLLs, Frequency Synthesizers Applications

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

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the package marking '6951' against the datasheet order information to confirm the specific part variant. Ensure the supplier documentation matches the Analog Devices Inc. manufacturer identification. Confirm the lead-free finish and RoHS compliance status via the official product page or authorized distributor channels before procurement.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select the LTC6951IUHF#PBF for output frequencies up to 2.5GHz. If any desired output frequency falls within the ranges of 2.5GHz to 2.7GHz, 1.66GHz to 1.8GHz, or 1.25GHz to 1.35GHz, choose the LTC6951-1 variant instead. This component is designed for applications requiring synchronized multi-chip operation using EZSync™ or ParallelSync™ technologies.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the LTC6951 family of clock synthesizers. It is distinct from the LTC695 microprocessor supervisory circuit series, which shares the base number but serves a different function. The IUHF suffix indicates the 40-lead (5mm × 7mm) Plastic QFN package with industrial temperature rating.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.