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参数资料
| 型号： | QT14-AC-11-FREQ2 |
| 厂商： | Q-TECH CORP |
| 元件分类： | XO, clock |
| 英文描述： | CRYSTAL OSCILLATOR, CLOCK, 12 MHz - 85 MHz, ACMOS OUTPUT |
| 封装： | ROHS COMPLIANT, HERMETIC SEALED, TO PACKAGE-8 |
| 文件页数： | 6/6页 |
| 文件大小： | 302K |
| 代理商： | QT14-AC-11-FREQ2 |
66
Q-TECH Corporation - 10150 W. Jefferson Boulevard, Culver City 90232 - Tel: 310-836-7900 - Fax: 310-836-2157 - www.q-tech.com
Q-TECH
CORPORATION
TRANSISTOR OUTLINE PACKAGES
TO-5 and TO-8 CRYSTAL CLOCK OSCILLATORS
1.8 to 15Vdc - 0.045Hz to 125MHz
TransistorOutlinePackages (RevisionA,May2008)(ECO#9304)
Phasenoiseismeasuredinthefrequencydomain,andisexpressedasaratioofsignalpowertonoisepowermeasuredina1Hz
bandwidthatanoffsetfrequencyfromthecarrier,e.g.10Hz,100Hz,1kHz,10kHz,100kHz,etc. Phasenoisemeasurementismade
withanAgilentE5052ASignalSourceAnalyzer(SSA)withbuilt-inoutstandinglow-noiseDCpowersupplysource. TheDCsource
isfloatedfromthegroundandisolatedfromexternalnoisetoensureaccuracyandrepeatability.
Inordertodeterminethetotalnoisepoweroveracertainfrequencyrange(bandwidth),thetimedomainmustbeanalyzedinthe
frequencydomain,andthenreconstructedinthetimedomainintoanrmsvaluewiththeunwantedfrequenciesexcluded. Thismaybe
donebyconvertingL(f)backtoSφ(f)overthebandwidthofinterest,integratingandperformingsomecalculations.
ThevalueofRMSjitteroverthebandwidthofinterest,e.g.10kHzto20MHz,10Hzto20MHz,represents1standarddeviationof
phasejittercontributedbythenoiseinthatdefinedbandwidth.
FigurebelowshowsatypicalPhaseNoise/PhasejitterofaQT1ACD10M,5.0Vdc,40MHzclockatoffsetfrequencies10Hzto5MHz,
andphasejitterintegratedoverthebandwidthof12kHzto1MHz.
PhaseNoiseandPhaseJitterIntegration
PeriodJitter
As data rates increase, effects of jitter become critical with
itsbudgetstighter. Jitteristhedeviationofatimingeventof
a signal from its ideal position. Jitter is complex and is
composed of both random and deterministic jitter
components. Randomjitter(RJ)istheoreticallyunbounded
and Gaussian in distribution. Deterministic jitter (DJ) is
bounded and does not follow any predictable distribution.
DJ is also referred to as systematic jitter. A technique to
measureperiodjitter(RMS)onestandarddeviation(1σ)and
peak-to-peakjitterintimedomainistouseahighsampling
rate(>8Gsamples/s)digitizingoscilloscope. Figureshows
an example of peak-to-peak jitter and RMS jitter (1σ) of a
QT1ACD-40MHz,at5.0Vdc.
RMSjitter(1σ):4.89ps
Peak-to-peakjitter:44.4ps
Symbol
Definition
∫L(f)
Integratedsinglesidebandphasenoise(dBc)
Sφ(f)=(180/Π)x
√2∫L(f)df
Spectraldensityofphasemodulation,alsoknownasRMSphaseerror(indegrees
RMSjitter=Sφ(f)/(fosc.360°)
Jitter(inseconds)duetophasenoise. NoteSφ(f)indegrees.
QT1ACD10M,5.0Vdc-40MHz
相关PDF资料 |
PDF描述 |
|---|---|
| QT14-AC-12-FREQ1 | CRYSTAL OSCILLATOR, CLOCK, 0.0007324 MHz - 12 MHz, ACMOS OUTPUT |
| QT14-AC-12-FREQ2 | CRYSTAL OSCILLATOR, CLOCK, 12 MHz - 85 MHz, ACMOS OUTPUT |
| QT14-AC-6-FREQ2 | CRYSTAL OSCILLATOR, CLOCK, 12 MHz - 85 MHz, ACMOS OUTPUT |
| QT14-AC-6-M-FREQ1 | CRYSTAL OSCILLATOR, CLOCK, 0.0007324 MHz - 12 MHz, ACMOS OUTPUT |
| QT14-AC-6-M-FREQ2 | CRYSTAL OSCILLATOR, CLOCK, 12 MHz - 85 MHz, ACMOS OUTPUT |
相关代理商/技术参数 |
参数描述 |
|---|---|
| QT14C-SERIES | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Peripheral IC |
| QT14HC-SERIES | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Peripheral IC |
| QT14T-SERIES | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Peripheral IC |
| QT150 | 制造商:QUANTUM 制造商全称:QUANTUM 功能描述:4 AND 5 KEY QTOUCH SENSOR ICs |
| QT150-A | 制造商:QUANTUM 制造商全称:QUANTUM 功能描述:4 AND 5 KEY QTOUCH SENSOR ICs |
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