LTC6945IUFD

Clock Generators, PLLs, Frequency Synthesizers Overview

The LTC6945IUFD is an ultralow noise and spurious integer-N synthesizer with an integrated voltage-controlled oscillator (VCO), manufactured by Analog Devices Inc. It operates within a frequency range of 0.35 GHz to 6 GHz, utilizing a CMOS output interface. The device functions as a high-performance phase-locked loop (PLL) system, incorporating a reference divider, a phase-frequency detector with lock indicator, a charge pump, an integer feedback divider, and a VCO output divider. Designed for precision timing applications, it supports input frequencies up to 250 MHz and requires a supply voltage between 3.15 V and 5.25 V. The component is housed in a 28-pin QFN package.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Integrated Integer-N Synthesizer with VCO covering 0.35 GHz to 6 GHz output range
• Ultralow phase noise and spurious performance suitable for high-frequency applications
• Built-in Phase-Locked Loop (PLL) architecture including PFD, charge pump, and dividers
• CMOS input and output signal levels with support for input frequencies up to 250 MHz

Clock Generators, PLLs, Frequency Synthesizers Applications

• High-performance clock generation systems requiring low jitter
• Wireless communication infrastructure equipment
• Test and measurement instrumentation
• Satellite and radar systems demanding precise frequency synthesis

Clock Generators, PLLs, Frequency Synthesizers Part Context

The LTC6945 belongs to the LTC694x family of clock synthesizers from Analog Devices. It is distinct from other models in the series, such as the LTC6946 or LTC6948, primarily by its specific frequency coverage and internal VCO configuration. The part is often evaluated using demonstration boards like the DC1649A-A, which requires the DC590 controller board for operation.