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pletronics普銳特為什么 TCXO 有削波的正弦波輸出?FX532B-16.0000

大多數(shù)陶瓷 LCC 封裝的 TCXO晶振 僅提供削波正弦波輸出。這樣做的原因有很多，盡管它讓許多想要 CMOS 輸出電平的電路設(shè)計人員感到沮喪。

FQ5032BR-12.000	Fox Electronics	C5BQ	MHz Crystal	12MHz	±50ppm
FQ5032BR-12.000	Fox Electronics	C5BQ	MHz Crystal	12MHz	±50ppm
FQ5032BR-20.000	Fox Electronics	C5BQ	MHz Crystal	20MHz	±50ppm
FQ5032BR-20.000	Fox Electronics	C5BQ	MHz Crystal	20MHz	±50ppm
FQ5032BR-20.000	Fox Electronics	C5BQ	MHz Crystal	20MHz	±50ppm
FQ5032BR-24.000	Fox Electronics	C5BQ	MHz Crystal	24MHz	±50ppm
FQ5032BR-24.000	Fox Electronics	C5BQ	MHz Crystal	24MHz	±50ppm
FQ5032BR-24.000	Fox Electronics	C5BQ	MHz Crystal	24MHz	±50ppm
FQ7050B-10.000	Fox Electronics	C7BQ	MHz Crystal	10MHz	±30ppm
FQ7050B-10.000	Fox Electronics	C7BQ	MHz Crystal	10MHz	±30ppm
FQ7050B-10.000	Fox Electronics	C7BQ	MHz Crystal	10MHz	±30ppm
FQ7050BR-8.000	Fox Electronics	C7BQ	MHz Crystal	8MHz	±50ppm
FQ7050BR-8.000	Fox Electronics	C7BQ	MHz Crystal	8MHz	±50ppm
FQ7050BR-8.000	Fox Electronics	C7BQ	MHz Crystal	8MHz	±50ppm
FQ7050BR-6.000	Fox Electronics	C7BQ	MHz Crystal	6MHz	±50ppm
FQ7050BR-6.000	Fox Electronics	C7BQ	MHz Crystal	6MHz	±50ppm
FQ7050BR-6.000	Fox Electronics	C7BQ	MHz Crystal	6MHz	±50ppm
FQ3225B-16.000	Fox Electronics	FQ3225B	MHz Crystal	16MHz	±50ppm
FQ3225B-16.000	Fox Electronics	FQ3225B	MHz Crystal	16MHz	±50ppm
FQ3225B-16.000	Fox Electronics	FQ3225B	MHz Crystal	16MHz	±50ppm

CMOS 輸出會顯著增加 TCXO IC 的功耗。 IC 和封裝中產(chǎn)生的溫度梯度將限制實(shí)現(xiàn)最佳 TCXO 補(bǔ)償?shù)哪芰Α?

FQ3225B-27.000	Fox Electronics	FQ3225B	MHz Crystal	27MHz	±50ppm
FQ3225B-27.000	Fox Electronics	FQ3225B	MHz Crystal	27MHz	±50ppm
FQ3225B-27.000	Fox Electronics	FQ3225B	MHz Crystal	27MHz	±50ppm
FQ3225BR-25.000	Fox Electronics	FQ3225B	MHz Crystal	25MHz	±50ppm
FQ3225BR-25.000	Fox Electronics	FQ3225B	MHz Crystal	25MHz	±50ppm
FQ3225BR-25.000	Fox Electronics	FQ3225B	MHz Crystal	25MHz	±50ppm
FQ3225BR-24.000	Fox Electronics	FQ3225B	MHz Crystal	24MHz	±50ppm
FQ3225BR-24.000	Fox Electronics	FQ3225B	MHz Crystal	24MHz	±50ppm
FQ3225BR-24.000	Fox Electronics	FQ3225B	MHz Crystal	24MHz	±50ppm
FQ3225BR-12.000	Fox Electronics	FQ3225B	MHz Crystal	12MHz	±50ppm
FQ3225BR-12.000	Fox Electronics	FQ3225B	MHz Crystal	12MHz	±50ppm
FQ3225BR-12.000	Fox Electronics	FQ3225B	MHz Crystal	12MHz	±50ppm
FQ1045AR-6.000	Fox Electronics	FQ1045A	MHz Crystal	6MHz	±30ppm
FQ1045AR-6.000	Fox Electronics	FQ1045A	MHz Crystal	6MHz	±30ppm
FQ1045AR-6.000	Fox Electronics	FQ1045A	MHz Crystal	6MHz	±30ppm
FQ1045AR-4.000	Fox Electronics	FQ1045A	MHz Crystal	4MHz	±30ppm
FQ1045AR-4.000	Fox Electronics	FQ1045A	MHz Crystal	4MHz	±30ppm
FQ1045AR-4.000	Fox Electronics	FQ1045A	MHz Crystal	4MHz	±30ppm
FQ1045AR-3.6864	Fox Electronics	FQ1045A	MHz Crystal	3.6864MHz	±30ppm
FQ1045AR-3.6864	Fox Electronics	FQ1045A	MHz Crystal	3.6864MHz	±30ppm

由于內(nèi)部熱梯度導(dǎo)致 TCXO 不符合規(guī)格，可能的 CMOS 負(fù)載范圍很廣會改變補(bǔ)償設(shè)計。

當(dāng)輸出電平改變時，CMOS 輸出會導(dǎo)致電源和接地瞬變。這種噪聲會對 TCXO 的相位噪聲性能產(chǎn)生不利影響。

FQ1045AR-3.6864	Fox Electronics	FQ1045A	MHz Crystal	3.6864MHz	±30ppm
FOXSLF/0368S	Fox Electronics	HC49SLF	MHz Crystal	3.6864MHz	±50ppm
FOXLF120	Fox Electronics	HC49ULF	MHz Crystal	12MHz	±50ppm
FOXSDLF/128-20	Fox Electronics	HC49SDLF	MHz Crystal	12.288MHz	±50ppm
FOXSDLF/081-20	Fox Electronics	HC49SDLF	MHz Crystal	8.192MHz	±50ppm
FOXSDLF/098-20	Fox Electronics	HC49SDLF	MHz Crystal	9.8304MHz	±50ppm
FOXSDLF/196-20	Fox Electronics	HC49SDLF	MHz Crystal	19.6608MHz	±50ppm
FOXSLF/115	Fox Electronics	HC49SLF	MHz Crystal	11.0592MHz	±50ppm
FOXSLF/200	Fox Electronics	HC49SLF	MHz Crystal	20MHz	±50ppm
FOXSDLF/0368R-20/TR	Fox Electronics	HC49SDLF	MHz Crystal	3.6864MHz	±50ppm
FOXSDLF/0368R-20/TR	Fox Electronics	HC49SDLF	MHz Crystal	3.6864MHz	±50ppm
FOXSDLF/0368R-20/TR	Fox Electronics	HC49SDLF	MHz Crystal	3.6864MHz	±50ppm
FOXSDLF/040R/TR	Fox Electronics	HC49SDLF	MHz Crystal	4MHz	±50ppm
FOXSDLF/040R/TR	Fox Electronics	HC49SDLF	MHz Crystal	4MHz	±50ppm
FOXSDLF/040R/TR	Fox Electronics	HC49SDLF	MHz Crystal	4MHz	±50ppm
FOXSDLF/060R-20/TR	Fox Electronics	HC49SDLF	MHz Crystal	6MHz	±50ppm
FOXSDLF/060R-20/TR	Fox Electronics	HC49SDLF	MHz Crystal	6MHz	±50ppm
FOXSDLF/060R-20/TR	Fox Electronics	HC49SDLF	MHz Crystal	6MHz	±50ppm
FOXSDLF/073R-20/TR	Fox Electronics	HC49SDLF	MHz Crystal	7.3728MHz	±50ppm
FOXSDLF/073R-20/TR	Fox Electronics	HC49SDLF	MHz Crystal	7.3728MHz	±50ppm

CMOS 輸出會產(chǎn)生更大的 EMI/RFI 信號，這可能會導(dǎo)致難以滿足美國 FCC 和其他國家最終系統(tǒng)的輻射能量限制。削波的正弦波，既是低幅度又主要是正弦波，導(dǎo)致低信號電平和更少的諧波。

FOXSDLF/073R-20/TR	Fox Electronics	HC49SDLF	MHz Crystal	7.3728MHz	±50ppm
FOXSDLF/100R-20/TR	Fox Electronics	HC49SDLF	MHz Crystal	10MHz	±50ppm
FOXSDLF/100R-20/TR	Fox Electronics	HC49SDLF	MHz Crystal	10MHz	±50ppm
FOXSDLF/100R-20/TR	Fox Electronics	HC49SDLF	MHz Crystal	10MHz	±50ppm
FOXSDLF/115R-20/TR	Fox Electronics	HC49SDLF	MHz Crystal	11.0592MHz	±50ppm
FOXSDLF/115R-20/TR	Fox Electronics	HC49SDLF	MHz Crystal	11.0592MHz	±50ppm
FOXSDLF/115R-20/TR	Fox Electronics	HC49SDLF	MHz Crystal	11.0592MHz	±50ppm
FOXSDLF/143R-20/TR	Fox Electronics	HC49SDLF	MHz Crystal	14.31818MHz	±50ppm
FOXSDLF/143R-20/TR	Fox Electronics	HC49SDLF	MHz Crystal	14.31818MHz	±50ppm
FOXSDLF/143R-20/TR	Fox Electronics	HC49SDLF	MHz Crystal	14.31818MHz	±50ppm
FOXSDLF/240FR-20/TR	Fox Electronics	HC49SDLF	MHz Crystal	24MHz	±50ppm
FOXSDLF/240FR-20/TR	Fox Electronics	HC49SDLF	MHz Crystal	24MHz	±50ppm
FOXSDLF/240FR-20/TR	Fox Electronics	HC49SDLF	MHz Crystal	24MHz	±50ppm
FOXSDLF250F-20	Fox Electronics	HC49SDLF	MHz Crystal	25MHz	±50ppm
FX252BS-20.000	Fox Electronics	FX252B	MHz Crystal	20MHz	±50ppm
FQ5032BR-10.000	Fox Electronics	C5BQ	MHz Crystal	10MHz	±30ppm
FQ5032BR-10.000	Fox Electronics	C5BQ	MHz Crystal	10MHz	±30ppm
FQ5032BR-10.000	Fox Electronics	C5BQ	MHz Crystal	10MHz	±30ppm
FQ5032BR-16.000	Fox Electronics	C5BQ	MHz Crystal	16MHz	±50ppm
FQ5032BR-16.000	Fox Electronics	C5BQ	MHz Crystal	16MHz	±50ppm

使用這些 TCXO 的許多應(yīng)用都有 ASIC 輸入，可以接受削波正弦波并在內(nèi)部轉(zhuǎn)換為 CMOS 邏輯電平。

FQ5032BR-16.000	Fox Electronics	C5BQ	MHz Crystal	16MHz	±50ppm
FX532B-10.000	Fox Electronics	FX532B	MHz Crystal	10MHz	±50ppm
FQ7050B-11.0592	Fox Electronics	C7BQ	MHz Crystal	11.0592MHz	±30ppm
FQ7050B-11.0592	Fox Electronics	C7BQ	MHz Crystal	11.0592MHz	±30ppm
FQ7050B-11.0592	Fox Electronics	C7BQ	MHz Crystal	11.0592MHz	±30ppm
FX425B-16.000	Fox Electronics	FX425B	MHz Crystal	16MHz	±50ppm
FQ5032B-19.6608	Fox Electronics	C5BQ	MHz Crystal	19.6608MHz	±30ppm
FQ5032B-14.7456	Fox Electronics	C5BQ	MHz Crystal	14.7456MHz	±30ppm
FQ5032B-14.7456	Fox Electronics	C5BQ	MHz Crystal	14.7456MHz	±30ppm
FQ5032B-14.7456	Fox Electronics	C5BQ	MHz Crystal	14.7456MHz	±30ppm
FQ5032B-10.000	Fox Electronics	C5BQ	MHz Crystal	10MHz	±30ppm
FQ3225B-20.000	Fox Electronics	FQ3225B	MHz Crystal	20MHz	±50ppm
FQ3225BR-16.000	Fox Electronics	FQ3225B	MHz Crystal	16MHz	±50ppm
FQ3225BR-16.000	Fox Electronics	FQ3225B	MHz Crystal	16MHz	±50ppm
FQ3225BR-16.000	Fox Electronics	FQ3225B	MHz Crystal	16MHz	±50ppm
FQ3225BR-20.000	Fox Electronics	FQ3225B	MHz Crystal	20MHz	±50ppm
FQ3225BR-20.000	Fox Electronics	FQ3225B	MHz Crystal	20MHz	±50ppm
FQ3225BR-20.000	Fox Electronics	FQ3225B	MHz Crystal	20MHz	±50ppm
FQ1045A-4.9152	Fox Electronics	FQ1045A	MHz Crystal	4.9152MHz	±30ppm
603-12-67	Fox Electronics	FX325BS	MHz Crystal	12MHz	±50ppm
617-24.572675-1	Fox Electronics	FX216B	MHz Crystal	24.572675MHZ	±50ppm
FX532B-11.0592	Fox Electronics	FX532B	MHz Crystal	11.0592MHz	±50ppm
FX532B-12.000	Fox Electronics	FX532B	MHz Crystal	12MHz	±50ppm
FX532B-16.000	Fox Electronics	FX532B	MHz Crystal	16MHz	±50ppm
FX532B-20.000	Fox Electronics	FX532B	MHz Crystal	20MHz	±50ppm

請參閱我們關(guān)于將削波正弦波電平轉(zhuǎn)換為 CMOS 的常見問題解答。這很容易做到，而且成本低。有意者聯(lián)系0755-27876565

FX532B-24.000	Fox Electronics	FX532B	MHz Crystal	24MHz	±50ppm
FX532B-24.576	Fox Electronics	FX532B	MHz Crystal	24.576MHz	±50ppm
FX425B-20.000	Fox Electronics	FX425B	MHz Crystal	20MHz	±50ppm
FX425B-24.000	Fox Electronics	FX425B	MHz Crystal	24MHz	±50ppm
FX425B-24.576	Fox Electronics	FX425B	MHz Crystal	24.576MHz	±50ppm
217-3.579545-12	Fox Electronics	FC	MHz Crystal	3.579545MHz	±50ppm
603-25-203	Fox Electronics	FX325BS	MHz Crystal	25MHz	±50ppm
FPXLF0368-20	Fox Electronics	FPXLF	MHz Crystal	3.6864MHz	±50ppm
FPXLF0368-20	Fox Electronics	FPXLF	MHz Crystal	3.6864MHz	±50ppm
FPXLF0368-20	Fox Electronics	FPXLF	MHz Crystal	3.6864MHz	±50ppm
FPXLF0368S	Fox Electronics	FPXLF	MHz Crystal	3.6864MHz	±50ppm
FPXLF036S	Fox Electronics	FPXLF	MHz Crystal	3.579545MHz	±50ppm
FPXLF040	Fox Electronics	FPXLF	MHz Crystal	4MHz	±50ppm
FPXLF049-20	Fox Electronics	FPXLF	MHz Crystal	4.9152MHz	±50ppm
FPXLF073-20	Fox Electronics	FPXLF	MHz Crystal	7.3728MHz	±50ppm
FPXLF080	Fox Electronics	FPXLF	MHz Crystal	8MHz	±50ppm
FPXLF080-20	Fox Electronics	FPXLF	MHz Crystal	8MHz	±50ppm
FPXLF100-20	Fox Electronics	FPXLF	MHz Crystal	10MHz	±50ppm
FPXLF115-20	Fox Electronics	FPXLF	MHz Crystal	11.0592MHz	±50ppm
FPXLF120-20	Fox Electronics	FPXLF	MHz Crystal	12MHz	±50ppm
FPXLF143-20	Fox Electronics	FPXLF	MHz Crystal	14.31818MHz	±100ppm
FPXLF160	Fox Electronics	FPXLF	MHz Crystal	16MHz	±50ppm
FPXLF160-20	Fox Electronics	FPXLF	MHz Crystal	16MHz	±50ppm
FPXLF200-20	Fox Electronics	FPXLF	MHz Crystal	20MHz	±50ppm
FPXLF250F-20	Fox Electronics	FPXLF	MHz Crystal	25MHz	±50ppm
603-40-48	Fox Electronics	FX325BS	MHz Crystal	40MHz	±20ppm
603-25-261	Fox Electronics	FX325BS	MHz Crystal	25MHz	±20ppm
FOXSLF/049-20	Fox Electronics	-	MHz Crystal	4.9152MHz	-

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