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New Options for Oscillator Selection | Skyworks XO/VCXO Lineup Achieving Low Jitter and Low Phase Noise

Skyworks' clock products include crystal oscillators (XOs), clock generators, jitter cleaners, and buffers.

This article focuses on crystal oscillators among these products, and introduces their product lineup and features.

Skyworks Oscillator (XO/VCXO) Lineup List

The oscillator lineup listed on the Skyworks website is shown below.

In recent years, the demand for higher precision clock signals has been increasing in fields such as data centers, communication infrastructure, and industrial equipment. To meet these demands, there is a growing need for oscillators with low jitter and low phase noise performance.

Skyworks offers crystal oscillators (XOs) and voltage-controlled crystal oscillators (VCXOs).

Each product line offers different jitter performance levels, including Ultra Low Jitter, Low Jitter, and General Purpose, allowing you to choose the product best suited to your application.

For more detailed product information, please refer to the Skyworks website.

https://www.skyworksinc.com/Products/Timing-Oscillators

Features of Skyworks crystal oscillators

Skyworks crystal oscillators feature low jitter and low phase noise performance.

Furthermore, unlike typical oscillators, our product lineup features a PLL (Process Loop) built-in, which is a major advantage as it allows for frequency changes and multiple frequency settings.

The Single, Dual, Quad, and Any options in the table each have the following characteristics.

・Single

It stores one pattern of frequency information.

Like a typical oscillator, it outputs a fixed default frequency when powered on.

・Dual

It stores two patterns of frequency information.

(Example: Frequency A ⇔ Frequency B)

The output frequency can be switched by switching the external pin (FS pin) between High and Low.

・Quad

It stores four patterns of frequency information.

(Example: Frequency A ⇔ Frequency B/C/D)

The output frequency can be switched by switching the external pins (FS0 and FS1 pins) between High and Low.

・Any

You can flexibly change the frequency as long as it stays within the supported frequency range.

The output frequency can be switched via I²C.

These features allow for flexible frequency changes during the development phase and support for systems with multiple operating modes.

Skyworks Inc. Phase Noise Verification Tool

Skyworks offers the "OSC Phase Noise Look-Up Tool" as a tool that allows for the evaluation of oscillator performance during the design phase.

This tool allows you to check the phase noise characteristics and RMS jitter of a target device by selecting the model number, output frequency, and output format.

Therefore, it is possible to understand the oscillator's performance even before actual equipment evaluation, allowing for efficient device selection.

As shown in the figure below, you can check the phase noise characteristics simply by selecting the conditions.

For more information about the OSC Phase Noise Look-Up Tool, please refer to the Skyworks website.

https://www.skyworksinc.com/tools/oscillator-phase-noise

Summary

Skyworks crystal oscillators offer excellent basic performance, including low jitter and low phase noise, as well as flexible frequency setting capabilities thanks to their built-in PLL (Phase-Looped Lock).

Furthermore, with a wide range of options including Single, Dual, Quad, and Any, it can accommodate a broad spectrum of applications, from fixed-frequency systems to those requiring frequency switching.

Furthermore, by utilizing the OSC Phase Noise Look-Up Tool, phase noise and RMS jitter can be checked from the early stages of design, enabling more efficient device selection.

When considering clock sources for replacing existing oscillators or for new designs, please take advantage of Skyworks' oscillators.

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