CDCVF2505DG4

Differential - Input:Output:	No/No
Base Part Number:	CDCVF2505
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C
Voltage - Supply:	3 V ~ 3.6 V
Divider/Multiplier:	No/No
Frequency - Max:	200MHz
Series:	--
Ratio - Input:Output:	1:5
Number of Circuits:	1
Output:	LVTTL
Input:	LVTTL
PLL:	Yes with Bypass
Type:	PLL Clock Driver
Part Status:	Active
Packaging:	Tube

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CDCVF2505DG4 Working Principle and Applications

The CDCVF2505DG4 clock generator from Texas Instruments combines a phase-locked loop (PLL) with fractional-N divider and voltage-controlled oscillator (VCO) for use in applications such as digital frequency synthesis, clock distribution, and regenerative timing. This device operates with a wide range of input frequencies.

Working Principle

The CDCVF2505DG4 operates using a phase-locked loop (PLL) and fractional-N divider. A voltage-controlled oscillator (VCO) is used to generate the output frequency. The PLL circuit generates an output frequency which is a multiple of the input frequency. The PLL circuit consists of a phase/frequency detector (PFD), a low pass filter (LPF) and VCO. The PFD compares the phase difference and frequency difference of the input frequency and the feedback frequency, and in response, produces two signals – UP and DOWN. The UP and DOWN signals are used to adjust the output frequency. The fractional-N divider is used to divide the PLL output frequency by a fractional amount, thus creating a finer resolution for the output frequency. The output frequency of the divider is then fed back to the PLL for frequency adjustment. The VCO is used to generate the output frequency. By adjusting the control voltage of the VCO, the output frequency can be varied.

Applications

The CDCVF2505DG4 is suitable for applications such as digital frequency synthesis, clock distribution, and regenerative timing. It can be used to generate stable and high speed frequencies with fractional-N resolution. It is also used in radio frequency communications systems, such as satellite and base stations, to help increase the data rate of transmissions. This clock generator can also be used in optical network systems, to improve the data communication rate. In addition, this device is also used in test and measurement equipment, such as signal sources and signal acquisition equipment.In conclusion, the CDCVF2505DG4 clock generator from Texas Instruments is a versatile device that is suitable for a wide range of applications. It combines a phase-locked loop (PLL) with a fractional-N divider and voltage-controlled oscillator (VCO) for use in digital frequency synthesis, clock distribution, and regenerative timing. This device provides a stable and high speed output frequency with fractional-N resolution, making it suitable for radio frequency communications systems, optical network systems, and test and measurement equipment.

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