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Vectron touts 'smallest' frequency translator

Posted: 22 Nov 2006 ?? ?Print Version ?Bookmark and Share

Keywords:Vectron? FX-730? FX-427? frequency translators? APLL?

Frquency translator from Vectron

Vectron International said it has released the industry's smallest quartz-based, ultralow-jitter frequency translator. The FX-730 is housed in a 5-by-7.5-by-2mm hermetic leadless ceramic package. The company also announced the FX-427, a new dual-output, low-jitter frequency translator.

Vectron said the new FX-730 and FX-427 frequency translators provide advantages over solutions using digital phase-locked loop (DPLL) technology, including superior jitter performance and improved time to market for developers of wireline, wireless, military, industrial and test equipment. In addition, these integrated solutions offer a single chip/module solution.

By leveraging analog phase-locked loop (APLL) technology with integrated voltage controlled SAW oscillators (VCSOs), these frequency translators can reduce OC-48 clock jitter by up to 130 percent (from 0.30ps RMS to 0.13ps RMS) versus traditional DPLLs, said the company.

The FX-730 quartz-based frequency translator is said to be six times smaller than discrete PLLs and two times smaller than competitive DPLL solutions. The FX-730 leverages an advanced PLL ASIC and SAW delay line to deliver best- in-class jitter performance, including a 600 percent improvement in broadband jitter (10Hz to 40MHz offset BW from carrier) over silicon DPLLs, according to the company. The FX- 730 is suitable for applications where ultralow-jitter clocks are required such as in SONET/SDH line cards, ITU-T G.709 FEC scaling, digital cross connects, IP routers and 10GbE access equipment.

The FX-427 dual-output, low-jitter frequency translator provides system designers with quartz-based, APLL performance in a surface-mount package, measuring 13.7-by-20.3-by-5.1mm. The FX-427 translates an input clock between 8kHz to 200MHz into a low-level jitter output frequency between 500MHz and 850MHz. A secondary low jitter output is also available that can be configured in different amounts such as one quarter, one half, or equal to the frequency of the primary output.

The FX-427 offers a broad range of input and output frequencies, while the loop filter bandwidth and voltage controlled crystal oscillator (VCXO) or VCSO selection can be customized.

Both frequency translators are ROHS-compliant, designed for 3.3V operation and offer complimentary LVPECL or LVDS output configurations. Commercial and industrial temperature ranges are supported.

- Gina Roos

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