SI5338Q-B03023-GM

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Clock/Timing - Application Specific

Introduction

The SI5338Q-B03023-GM is a high-precision, low-power frequency synthesizer module from Silicon Labs. It effectively combines an integrated, versatile frequency synthesizer, a low-jitter clock oscillator, a fractional-N PLL, and a voltage controlled oscillator (VCO) on a tiny, 5 x 5 mm surface-mount module. The device is designed to provide flexibility and superior performance that is suitable for applications such as IEEE 1588, video broadcast mux/demux, LED light drivers, base station clocks, and enterprise-class routers.

Application Field and Working Principle

The SI5338Q-B03023-GM excels in applications that require low phase noise and high frequency switching speeds. As a clock generator, it provides support for a wide range of output frequencies and multi-frequency support. The outputs can be adjusted to meet the requirements of most applications, providing excellent clock jitter performance of just 8 to 10ps RMS.

The device utilizes two primary components - the programmable fractional-N PLL and the VCO. The PLL controls the frequency of the VCO output based on its input frequency, output frequency and reference frequency. The PLL is adjustable via the device\'s register configuration so that a wide variety of active modes, such as restricted hopping, fractional PLL or fractional VCO output modes, can be used. Additionally, the PLL can be configured to operate in dual or quad output clock modes.

The VCO forms the last stage of the device’s frequency synthesizer. This VCO has a frequency range from 0.6 to 600MHz, making it ideal for demanding tasks such as base station synchronization. The VCO is based on digital modulation as well as tuned control oscillator (TCO) technology, allowing for flexible adjustment of the output frequency and dependent clock delays. In addition, the device’s frequency hopping algorithm helps to reduce phase noise and jitter. The VCO is designed for the highest possible performance, allowing for the device to achieve high frequency switching speeds (up to ±200 ppm) and low phase noise of just -160 dBc/Hz.

Conclusion

The SI5338Q-B03023-GM is an excellent choice for applications that demand high performance, low phase noise, and high frequency switching speeds. Its integrated fractional-N PLL and VCO design is highly flexible and accurate, ensuring that most applications that require high-performance, low-jitter clock generators can be met. Additionally, the device\'s VCO frequency range of 0.6 to 600MHz makes it suitable for a wide range of demanding tasks such as base station synchronization. The frequency hopping algorithm also helps to reduce phase noise and jitter. Therefore, if you are looking for an extremely versatile, high precision clock generator for a wide range of applications, the SI5338Q-B03023-GM should be an excellent choice.

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