SI5351C-A-GT

Clock/Timing - Clock Generators, PLLs, Frequency Synthesizers

The SI5351C-A-GT is a low jitter clock generator capable of generating any frequency from 8 kHz to about 200 MHz. It belongs to a family of clock generators and can be used for different applications, such as clock distribution, clock synchronization and clock synthesizers. The SI5351C-A-GT has several features which make it suitable for these applications including: High precision, low phase noise, low jitter, high phase accuracy and wide frequency range.

Application field

The main applications of the SI5351C-A-GT are in the fields of communication, instrumentation and consumer electronics. In communication, the clock generator can be used for clock synchronization in complex network systems for mobile and base station applications. The clock generator can be used in instrumentation for precision timing and controlling process. It is also used for consumer electronics for remotes and entertainment systems.

Working Principle

The SI5351C-A-GT uses a phase-locked loop (PLL) to generate an output frequency which is a multiple of a reference frequency. The reference frequency is set by a crystal oscillator. The 1 or 2 output clock signals can be synthesized in a range from 8 kHz to 150 MHz depending on the frequency of the reference crystal. When the oscillator is locked to the reference frequency, the output frequencies are then divided by the internally set Integer value or Fractional value.

The Integer mode or Fractional mode can be selected independently for each of the clock outputs. In Integer mode, the output frequency is a multiple of the reference frequency. In Fractional mode, it is possible to generate an output frequency which is not an exact multiple of the reference frequency.

The SI5351C-A-GT also offers a Spread Spectrum mode. This mode is used to reduce electromagnetic interference by introducing low-amplitude frequency variations. This helps reduce the peak amplitude of the harmonic signals produced by the generator.

Conclusion

The SI5351C-A-GT is a low jitter clock generator capable of generating any frequency from 8 kHz to about 200 MHz. It is suitable for application in communication, instrumentation and consumer electronics. The output frequency is synthesized using a phase-locked loop (PLL). The clock can be output in an Integer or Fractional mode. The Spread Spectrum mode is also available to reduce electromagnetic interference by introducing low amplitude frequency variations.