LTC6950IUHH#TRPBF

Clock Generators, PLLs, Frequency Synthesizers Overview

The LTC6950IUHH#TRPBF is a low phase noise integer-N frequency synthesizer core with clock distribution, housed in a 48-lead (5mm × 9mm) plastic QFN package. It operates over a junction temperature range of –40°C to 105°C. The device features a full PLL core with programmable reference and feedback dividers, supporting VCO input frequencies up to 1.4GHz. It provides four independent LVPECL outputs and one configurable LVDS/CMOS output. Electrical characteristics include a normalized in-band phase noise floor of –226dBc/Hz and additive jitter of 18fsRMS (12kHz to 20MHz).

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Four independent low-noise LVPECL outputs capable of operation up to 1.4GHz.
• One configurable output selectable as LVDS (800MHz) or CMOS (250MHz).
• Five independently programmable dividers covering all integers from 1 to 63.
• Five independently programmable VCO clock cycle delays covering all integers from 0 to 63.

Clock Generators, PLLs, Frequency Synthesizers Applications

• Clocking high-speed, high-resolution ADCs and DACs.
• Low jitter clock generation and distribution systems.
• High frequency, high resolution data acquisition systems.

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the ordering suffix #TRPBF indicates tape and reel packaging when sourcing this component. Confirm that the IUHH suffix corresponds to the specified 48-lead plastic QFN package and the –40°C to 105°C junction temperature range. Ensure compatibility with the required PCB footprint for the exposed pad ground connection.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component for applications requiring low additive jitter, specifically 18fsRMS between 12kHz and 20MHz. The device supports VCO inputs up to 1.4GHz and offers flexible output configurations via programmable dividers and delays. Consider the power supply requirements, including separate supplies for V+, VREF+, VVCO+, and VPx+ rails, when designing the power architecture.

Clock Generators, PLLs, Frequency Synthesizers Part Context

The LTC6950 is an integer-N frequency synthesizer designed for high-performance timing applications. The IUHH variant specifies the plastic QFN package and industrial temperature range. The #TRPBF suffix denotes the tape and reel packaging format and lead-free finish, distinguishing it from tube-packaged versions like the #PBF.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult Analog Devices marketing for parts with wider operating temperature ranges or alternative packaging options.