SI5335B-B03221-GM

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The Si5335B-B03221-GM is a clock generator, phase-locked loop, frequency synthesizer device from Silicon Labs. It has great features and specifications which make it an ideal choice for many applications. This article will explain the application field and working principle of the device.

Introduction

The Si5335B-B03221-GM is a stand-alone third-generation fractional-N programmable frequency synthesizer. It is designed with a dual-loop architecture and has an integrated 25-Ch Ref Divider offering high flexibility in applications with either an external VCO or Si570 programmable VCO directly connected to the synthesizer’s VCx input. It is capable of providing clock outputs up to 166MHz, with output frequencies ranging from 1kHz up to 200MHz. The device also offers low jitter output clocks, as well as Spread Spectrum, a clock switching feature for dynamic clock switching in AC and DC applications.

Application Field

The Si5335B-B03221-GM is designed for applications such as backplane, server and telecommunications systems, consumer and consumer electronics, gaming, test and measurements, networking, and medical instrumentation. It consumes very low power and requires very low current for operation, making it ideal for embedded and remote applications. The device provides high flexibility with output frequencies up to 200MHz. It can be used to generate a variety of 16 to 32-bit complex clocks and signals with minimal jitter and noise, as well as spread spectrum with clock switching. Additionally, the integrated PLLs and dividers inside the device can be used to generate core, memory and graphic frequencies, while the integrated VCXs can be used to offer PCIE reference clocks which are compliant to PCIE standards.

Working Principle

The Si5335B-B03221-GM performs its works based on the principle of fractional-N technology. This method makes use of a Digital-to-Analog Converter (DAC) to interpolate the phase of the incoming reference clock and create a numerically controlled output signal with a desired frequency. The reference clock input is divided by a programmable integer N, allowing the output frequency to be approximately equal to or less than the reference frequency. The internal 16-bit DAC of the Si5335B-B03221-GM allows it to perform the fine adjustments to the output frequency which gives higher resolution, accuracy and jitter performance.

The internal PLL of the Si5335B-B03221-GM works in conjunction with the integer divider N and the VCx input. The VCx input can be used to connect an external VCX or Si570 programmable VCO to the synthesizer input. The internal PLL of the Si5335B-B03221-GM works to tune and lock the fractional-N divider output to the external VCO or Si570. The 25-Ch ref Divider provides a wide range of input reference frequencies up to 100MHz, providing a wide range of output frequencies.

Conclusion

The Si5335B-B03221-GM is a clock generator, phase-locked loop, frequency synthesizer device from Silicon Labs designed for a wide range of applications, from backplane, server and telecommunications systems, consumer and consumer electronics, gaming, test and measurements, networking, and medical instrumentation. It works based on fractional-N technology and offers low jitter output clocks, as well as Spread Spectrum, a clock switching feature for dynamic clock switching in AC and DC applications. The Si5335B-B03221-GM is a great device for applications that requires high flexibility, accuracy, and jitter performance.

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