SI5355A-B01320-GMR

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Background

The SI5355A-B01320-GMR is part of the Clock Generators,PLLs, Frequency Synthesizers class of products. It is technically an oscillatorthat uses a multiple loop phase-locked loop (PLL) frequency synthesis technique to produce high precision, multi-band output frequencies in the range of 24.8 MHz to 1100 MHz.The device is a compact surface-mount, 20-pin QFN package that enableshigh-performance, cost-effective frequency synthesis for a wide variety of applications. The SI5355A-B01320-GMR is a programmable, stand-alone clock generator and PLL device designed to provide a wide range of high-precision reference clock frequencies and digital signal processing capabilities in highly integrated system-on-chip (SoC) and system-in-package (SIP) products.

Application Field

The SI5355A-B01320-GMR can be used in a variety of applications including wirelesscommunications and wireless infrastructure, as well as broadcast audio, video, and data. Additionally, the frequency synthesizer can be used in set-top boxes, TV receivers, point of sale systems, industrial automation, test and measurement equipment, medical electronics, and instrumentation.

Specifically, in wireless applications the SI5355A-B01320-GMR can be used as a local oscillator in RF transceivers, dual-loop synthesizers, DRX synthesizers, phase-locked synthesizers, or as a PCI or GSM clocks in wireless network elements. In addition, the device can be used exclusively for WLAN applications such as for example providing a clock for IEEE 802.11 a/b/g/n/ac compliancy

Working Principle

The SI5355A-B01320-GMR utilizes a PLL frequency synthesis technique developedthrough multiple loop-phase lock loop (PLL) approach. The module comprises of a 24.8 to 1100MHz Voltage Controlled Oscillator (VCO) divided by a 5/6-bit input divider together with a 7-bit output divider. To ensure stability, a loop filter is included to prevent any sudden change in the output frequency.

These multiple loops allows a wide tuning range and also supports a wide range of operation including fast lock speed and excellent phase noise performance. Additionally, the device provides a wide filter bandwidth and supports three-phase clock outputs from one clock input. This allows users to generate multiple output clocks from a single reference clock. For distributed clocking applications, the module can be used with a spread spectrum clock generator to provide low EMI operation.

In terms of jitter performance, the SI5355A-B01320-GMR provides a jitter performance of <1ps RMS (100kHz ~ 20MHz) which is more than sufficient in most high performance systems.

Conclusion

The SI5355A-B01320-GMR is a compact and high performance clock generator and PLL device designed to provide a wide range of high-precision reference clock frequencies and digital signal processing capabilities in highly integrated system-on-chip and system-in-package products. The device is suitable for a variety of applications, including wireless communications and wireless infrastructure, broadcast audio and video, point of sale systems, industrial automation, test and measurement equipment, medical electronics, and instrumentation. The device utilizes a multiple loop PLL frequency synthesis technique and provides excellent jitter performance and frequencytuning range.

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