SI5345C-D-GM Datasheet/PDFSI5345C-D-GM is a high performance, low-cost clock multiplier and Clock Generator for applications requiring a wide frequency range. It is designed to simplify clock design, reduce cost, and improve time-to-market. The SI5345C-D-GM can generate up to ten output clocks and frequencies that range from 8 kHz to 800MHz. It comes with integrated jitter attenuation and low-power operation which help engineer develop robust designs while conserving total power.
Application Field of SI5345C-D-GM
The SI5345C-D-GM is widely used in a variety of clock-sensitive applications and systems, including mobile handsets and accessories, general mobile designs, automotive audio systems, digital-to-analog conversion (DAC) and analog-to-digital conversion (ADC) applications, personal computer systems, and medical equipment. With its wide frequency range, the SI5345C-D-GM can provide frequency flexibility and reduce component count while maintaining clocking accuracy and reliability. This clock generator is targeted for applications requiring low additive jitter, low power, and small size.
Working Principle of SI5345C-D-GM
The SI5345C-D-GM is a fully-integrated Clock Generator utilizing multiple fractional-N frequency synthesis techniques for clock generation. It uses a single Reference Clock signal to generate high quality output clock signals with jitter attenuation. The SI5345C-D-GM is able to source multiple output frequencies that can range from 8kHz to 800MHz. This includes sub-clock frequencies, clock multiplication and division, fractional frequencies, and beyond.
The working mechanism can be summarized in two parts. Firstly, the Reference Clock signal is sent through a PLL for multiplication or division. The PLL can multiply or divide the Ref Clock by an integer or fixed integer multiple or divide. The output of the PLL is then fed into a digital frequency synthesizer (DFS), which can generate a frequency that is an exact multiple or division of the PLL output frequency. The output of the DFS is a highly accurate clock signal. Secondly, there is a Frequency/Time Selector, which is used to configure the output Frequencies or Duty Cycles or Delay Values of the SI5345C-D-GM based on the application needs.
In summary, the SI5345C-D-GM Clock Generator is a powerful and cost-effective solutions for frequency and clock multiplication needs in the clock-sensitive applications. Its wide frequency range, integrated jitter attenuation, low-power operation, and capability to generate accurate signals makes it an ideal choice for a variety of applications.