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Q-Tech使用多路輸出QT6254LWD9M-125.00MHz太空時鐘的好處

來源：http://m.review-result.com 作者：億金電子 2024年03月11

Q-Tech使用多路輸出QT6254LWD9M-125.00MHz太空時鐘的好處

使用多路輸出低噪聲時鐘為航天原始設備制造商提供了三大優(yōu)勢：

1，節(jié)省電路板空間。首先，它們在終端設備設計中節(jié)省了PC板空間。只需要一個封裝，而不是使用多達12個獨立的石英晶體振蕩器。這對于努力減小衛(wèi)星電子設備的尺寸具有重要意義。這也節(jié)省了OEM的工程時間，因為不再需要仔細設計和協(xié)調(diào)不同時鐘振蕩器的輸出，這項工作已經(jīng)在多輸出時鐘內(nèi)部完成。

2，高性能。其次，為空間應用定制的多個輸出時鐘可以在重要方面提供卓越的性能。對于Q-Tech單元，輸出之間的偏斜保證小于0.4納秒，積分相位抖動（12kHz至20MHz）小于1PS，所有失調(diào)下的低相位噪聲都非常出色。

3，節(jié)約成本。第三，通過節(jié)省采購（多達）12個獨立時鐘振蕩器的費用，總體成本得以降低。

空間應用中使用的多輸出時鐘必須符合與單輸出空間合格設備相同的規(guī)格。Q-Tech生產(chǎn)高達200MHz的多差分輸出LVDS全空間時鐘，以及高達125MHz的CMOS全空間多輸出時鐘。QT625 LVDS差分晶振系列從一個扁平封裝提供兩個多達12個同步輸出，CMOS版本最多四個輸出。通過利用一個超精密、密封的石英晶體諧振器提供所有輸出，在設計和制造諧振器以實現(xiàn)卓越性能方面不遺余力。

這個創(chuàng)新的設備系列已經(jīng)生產(chǎn)了四年多，并且已經(jīng)建立了一個令人印象深刻的遺產(chǎn)項目列表。這些單元保證達到100k（國際標準）TID，并且不會閂鎖和干擾。它們是MIL-PRF-55310規(guī)定的1型2類混合動力車，它們符合MIL-PRF-38534K級要求。在-55C至+125C溫度范圍內(nèi)，它們可以保證高達50PPM的溫度。有源晶振，這些多路輸出時鐘提供的整體性能和可靠性至少與Q-Tech數(shù)十年來業(yè)界領先的太空時鐘振蕩器一樣高。

多輸出LVDS系列，3.3Vdc，1到12個差分LVDS對，空間限定晶體振蕩器，15MHz至200MHz
Q-Tech進口晶振生產(chǎn)的QT625LW和QT697LW系列空間合格、100kRad（Si）容限混合振蕩器是符合MIL-PRF-55310標準的2類混合型多輸出LVDS，密封在20引腳扁平封裝中。625”SQR或1.25”x 1.65”62引腳定制扁平封裝中，在整個軍用-55°C至+125°C溫度范圍內(nèi)以3.3Vdc運行。該產(chǎn)品結(jié)合了良好的抗沖擊和振動性能以及卓越的低相位噪聲。

產(chǎn)品特征：

•美國制造

•密封包裝

•電源電壓3.3Vdc

•寬溫度范圍-55°C至+125°C

•MIL-PRF-38534 K級篩選和質(zhì)量一致性檢查（修改）

•LVDS差分輸出

•100k（Si）輻射耐受性

•低相位噪聲和抖動

應用程序：•衛(wèi)星，•航空航天，•FPGA主時鐘

Q-Tech使用多路輸出QT6254LWD9M-125.00MHz太空時鐘的好處

The Benefits of Using Multiple-Output Space Clocks

The use of multiple-output low-noise clocks provides three major advantages to space OEMs.

1，Board Space Savings. First, they save PC board space in the end equipment design. Instead of using up to 12 separate crystal oscillators, only one package is needed. This is of major significance in efforts to reduce the size of satellite electronic equipment. This also saves engineering time at the OEM because it is no longer necessary to carefully design and coordinate the outputs of different clock oscillators, with that work being done internally already in the multiple output clock.

2，High Performance. Second, multiple output clocks tailored for space applications can deliver superior performance in important ways. For Q-Tech units, skew between outputs is guaranteed to be less than 0.4 nanoseconds, integrated phase jitter (from 12 kHz to 20 MHz) is less than one ps, and low-phase noise at all offsets is superb.

3，Cost Savings. Third, by saving the expense of procuring (up to) 12 separate clock oscillators, overall cost is reduced.

Multiple-output clocks used in a space application must meet the same specs as single-output space-qualified devices. Q-Tech produces multiple differential output LVDS full-space clocks at up to 200 MHz, and also CMOS full-space multiple output clocks at up to 125 MHz, in frequency. The QT625 LVDS series offers two up to 12 synchronous outputs from one flatpack package, and the CMOS version up to four outputs. By providing all outputs through the utilization of one ultra-precision, hermetically sealed quartz crystal resonator, no expense is spared in designing and making the resonator achieve superior performance.

This innovative family of devices has been in production for more than four years and has already built up an impressive list of heritage programs. These units are guaranteed to 100k(Si) TID and are latch-up and upset-free. They are Type 1, Class 2 hybrids per MIL-PRF-55310and they meet MIL-PRF-38534 Class K requirements. They can guarantee up to ±50 PPM from -55C to +125C. These multiple-output clocks provide overall performance and reliability that is at least as high as Q-Tech’s decades-long, industry-leading space clock oscillators.

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