LTC6946IUFD-1#PBF

Series:	--
Packaging:	Tube
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Type:	Clock/Frequency Synthesizer (RF/IF), Integer N
PLL:	Yes
Input:	Clock
Output:	Clock
Number of Circuits:	1
Ratio - Input:Output:	1:1
Differential - Input:Output:	Yes/Yes
Frequency - Max:	3.74GHz
Divider/Multiplier:	Yes/Yes
Voltage - Supply:	3.15 V ~ 5.25 V
Operating Temperature:	-40°C ~ 105°C
Mounting Type:	Surface Mount
Package / Case:	28-WFQFN Exposed Pad
Supplier Device Package:	28-QFN (4x5)
Base Part Number:	LTC6946

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Clock/Timing - Clock Generators, PLLs, Frequency SynthesizersThe LTC6946IUFD-1#PBF is a versatile, low-noise, low-drift, high-performance frequency synthesizer from Linear Technology. This IC is used to generate high-frequency signals from lower frequency reference clocks. It works by using an array of phase-lockedloop circuits, also known as a fractional-N frequency synthesizer, to producethe desired output frequencies.The LTC6946IUFD-1#PBF can generate a wide range of frequencies, ranging from 90kHz to over 600MHz, depending on the reference clock frequency, the loop parameters and the switch frequency. The output accuracy is typically specified to better than ±3 ppm, and the device typically operates with a power supply between 1.7 and 3.6 volts. It also has built-in protection circuits to minimize errors due to output load variations and has configurable input sets for lower speed differential reference clock signals.The LTC6946IUFD-1#PBF is typically used in applications such as digital communications, high-performance analog-to-digital converters, clock and data recovery systems, frequency hopping systems, and oscillator/frequency synthesizers. It is also commonly found in systems where low-noise wideband frequency synthesis and low-drift signals are needed. The device is often used in automotive systems, medical equipment, and military applications.The basic working principle of the LTC6946IUFD-1#PBF is to use the lower frequency reference clock signals to generate the desired output frequency. This is accomplished through a loop configuration called a fractional-Nfrequency synthesizer. In this system, the reference clocks are divided into fractional parts and inputs to a phase-locked loop, or PLL. The PLL is then used to generate the desired output frequency by adjusting the loop parameters, such as the loop bandwidth, the center frequency of the loop, and the gain.The LTC6946IUFD-1#PBF also offers a number of features that make it a suitable choice for many applications. These features include a low-noise output with high accuracy, programmable frequencies, wide frequency range, low power consumption, small overall size, and a built-in ESD protection circuit. It also includes output drivers with integrated circuit protection circuitry to prevent damage from output loading variations.In conclusion, the LTC6946IUFD-1#PBF is a versatile, low-noise, low-drift, high-performance frequency synthesizer that is ideal for many applications. Its fractional-N frequency synthesizerworkings provide a wide output frequency range and high accuracy, while its features such as ESD protection, programmable frequency range, low power consumption, and small physical size make it suitable for a wide variety of applications.

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