- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄202077 > QT70-L-9-85.000MHZ (Q-TECH CORP) CRYSTAL OSCILLATOR, CLOCK, 85 MHz, LVHCMOS OUTPUT PDF資料下載
參數(shù)資料
| 型號(hào)： | QT70-L-9-85.000MHZ |
| 廠商： | Q-TECH CORP |
| 元件分類： | XO, clock |
| 英文描述： | CRYSTAL OSCILLATOR, CLOCK, 85 MHz, LVHCMOS OUTPUT |
| 封裝： | ROHS COMPLIANT, HERMETIC SEALED, LEADLESS, CERAMIC, SMD, 48 PIN |
| 文件頁(yè)數(shù)： | 6/6頁(yè) |
| 文件大?。?/td> | 494K |
| 代理商： | QT70-L-9-85.000MHZ |
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
LEADLESS CHIP CARRIER
CRYSTAL CLOCK OSCILLATORS
1.8 to 15Vdc - 732.4Hz to 125MHz
LeadlessChipCarrier (RevisionD,August2008)(ECO#9414)
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/PhasejitterofaQT66T10M,5.0Vdc,24MHzclockatoffsetfrequencies10Hzto5MHz,
andphasejitterintegratedoverthebandwidthof12kHzto1MHz.
PhaseNoiseandPhaseJitterIntegration
PeriodJitter
Asdataratesincrease,effectsofjitterbecomecriticalwith
itsbudgetstighter. Jitteristhedeviationofatimingevent
of a signal from its ideal position. Jitter is complex and
is composed of both random and deterministic jitter
components. Random jitter (RJ) is theoretically un-
boundedandGaussianindistribution. Deterministicjitter
(DJ) is bounded and does not follow any predictable
distribution. DJisalsoreferredtoassystematicjitter. A
technique to measure period jitter (RMS) one standard
deviation(1σ)andpeak-to-peakjitterintimedomainisto
use a high sampling rate (>8G samples/s) digitizing
oscilloscope. Figure shows an example of peak-to-peak
jitterandRMSjitter(1σ)ofaQT66T-24MHz,at5.0Vdc.
RMSjitter(1σ):8.20ps
Peak-to-peakjitter:70.89ps
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.
QT66T10M,5.0Vdc,24MHz
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| QT2-T-11-FREQ1 | CRYSTAL OSCILLATOR, CLOCK, 0.000000045 MHz - 12 MHz, TTL OUTPUT |
| QT3-AC-D-1-M-FREQ1 | CRYSTAL OSCILLATOR, CLOCK, 0.0007324 MHz - 12 MHz, ACMOS OUTPUT |
| QT62-T-1-FREQ1 | CRYSTAL OSCILLATOR, CLOCK, 0.0007324 MHz - 12 MHz, TTL OUTPUT |
| QT62-T-3-FREQ2 | CRYSTAL OSCILLATOR, CLOCK, 12 MHz - 20 MHz, TTL OUTPUT |
| QT62-T-6-60.000MHZ | CRYSTAL OSCILLATOR, CLOCK, 60 MHz, TTL OUTPUT |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| QT7F | 制造商:Switchcraft 功能描述:QG TWIST INSERT 7 P |
| QT7FBAU | 制造商:Switchcraft 功能描述:QG TWIST INSERT BLA |
| QT7M | 制造商:Switchcraft 功能描述:QG TWIST INSERT 7 P |
| QT7MB | 制造商:Switchcraft 功能描述:QG TWIST INSERT 7 PI |
| QT7MBAU | 制造商:Switchcraft 功能描述:QG TWIST INSERT BLA |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。