5P49V6965ANLGI8

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Frequency synthesizers play an integral role in a broad range of applications such as telecommunication, data communication, broadcast, radar, navigation and instrumentation. 5P49V6965ANLGI8 is a frequency synthesizer that allows complete digital control of frequency, phase and channel frequency selection modes. It offers high performance, flexibility and excellent power-to-performance ratios, ideal for clock generator designs. In this article, we will discuss the application fields and working principles of the 5P49V6965ANLGI8.

Application Fields
The 5P49V6965ANLGI8 is a digital clock generator with ultra-low jitter performance. It is designed to clock a variety of applications such as microprocessors, FPGAs, Ethernet, and USB as well as high speed data links such as PCIe, SFP, and QSFP. It integrates a fully programmable frequency synthesizer capable of generating clock frequencies up to 10GHz in fractional-N mode, and up to 12.5GHz in integer-N mode. It also offers phase-lock-loop (PLL) phase delay of 3ps, frequency accuracy of ±1ppm, and phase jitter of 15ps RMS. This make the 5P49V6965ANLGI8 ideal for applications where superior jitter performance is required, such as high speed optical transceivers and chip-to-chip interconnects.

Working Principles
The 5P49V6965ANLGI8 utilizes a phase-locked loop (PLL) architecture for synthesizing the target frequency. A PLL consists of a controllable oscillator and a comparison circuit. In the 5P49V6965ANLGI8, a crystal oscillator is used as the reference frequency, and a charge-pump loop filter is used for frequency control. The comparison circuit compares the output of the reference oscillator and the VCO, and provides an error signal to the charge-pump, which in turn adjusts the VCO frequency accordingly. The comparison circuit is also known as the phase detector, and it is responsible for providing the error signal, so that the VCO is always in phase with the reference oscillator.The 5P49V6965ANLGI8 features an integrated VCO, a programmable divider, and a dynamic frequency control (DFC) function. The integrated VCO and programmable divider can be used to generate desired frequencies, while the dynamic frequency control function can be used to adjust the output frequency in case of frequency drift. This ensures that the output frequency is always in sync with the reference frequency. In addition, the 5P49V6965ANLGI8 also features a dynamic output power control (DOPC) function, which enables the output power to be adjusted according to the output frequency.

Conclusion
The 5P49V6965ANLGI8 frequency synthesizer is primarily used in high-speed optical transceivers and chip-to-chip interconnects. It utilizes a PLL architecture for synthesizing the target frequency, and offers high performance, flexibility and excellent power-to-performance ratios. In addition, it also features an integrated VCO, a programmable divider and dynamic frequency and output power control functions, which enable the output frequency and power to be adjusted in case of frequency drift.

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