深度解析影响晶振寿命的因素
一个完整的晶体参数包括频率,精度,负载电容,型号,温度等,例如EPSON FA-20H系列、FA-238V系列,而一个完整的晶振参数包括频率,精度,负载电容,型号,温度,电压等,例如EPSON SG-5032系列、SG-7050系列。晶体是一种无源器件,而晶振是一种有源器件,专业的讲,我们可以称之为晶体振荡器,两者均属于频率元器件,因此频率这项参数,我们不难理解。晶振的精度即是指晶振的误差大小,通常我们所听到的“我希望我的产品在5年时间偏差不超过5分钟”,意思就是对晶振的精度要求。温度则是包括了晶体和晶振的储存温度和工作温度。型号毋庸置疑,一个型号可以让我们准备的判断出晶振的品牌信息,规格信息等。负载电容是指在电路中跨接晶体两端的外界有效电容,是晶振正常震荡所需要的电容,一般外接电容,是为了使晶振两端的等效电容等于或者接近负载电容。
晶振除了清楚自身的负载电容外,还需要掌握外接电容的大小。晶振的负载电容=[(Cd*Cg)/(Cd+Cg)]+Cic+△C式中Cd,Cg为分别接在晶振的两个脚上和对地的电容,Cic(集成电路内部电容)+△C(PCB上电容).就是说负载电容15pf的话,两边个接27pf的差不多了,一般a为6.5~13.5pF。
有关于晶振的匹配电容主要作用就是对晶体和振荡电路的补偿和匹配,让电路容易起振并处于合理的激励状态下,同时对震荡频率也有一定的“微调”作用。晶振的过激或欠激虽然可工作,但前者容易让晶振老化,影响使用寿命,并导致振荡电路的EMC特性变劣。而后者则导致晶振不容易起振,稳定度较难掌握,所以电容量的大小会轻微影响震荡频率的高低。
各种逻辑芯片的晶振引脚可以等效为电容三点式振荡器。世强电讯分析得出晶振引脚的内部通常是一个反相器, 或者是奇数个反相器串联. 在晶振输出引脚 XO 和晶振输入引脚 XI 之间用一个电阻连接, 对于 CMOS 芯片通常是数 M 到数十 M 欧之间. 很多芯片的引脚内部已经包含了这个电阻, 引脚外部就不用接了. 这个电阻是为了使反相器在振荡初始时处与线性状态, 反相器就如同一个有很大增益的放大器, 以便于起振. 石英晶体也连接在晶振引脚的输入和输出之间, 等效为一个并联谐振回路, 振荡频率应该是石英晶体的并联谐振频率. 晶体旁边的两个电容接地, 实际上就是电容三点式电路的分压电容, 接地点就是分压点. 以接地点即分压点为参考点, 振荡引脚的输入和输出是反相的, 但从并联谐振回路即石英晶体两端来看, 形成一个正反馈以保证电路持续振荡. 在芯片设计时, 这两个电容就已经形成了, 一般是两个的容量相等, 容量大小依工艺和版图而不同, 但终归是比较小, 不一定适合很宽的频率范围. 外接时大约是数 PF 到数十 PF, 依频率和石英晶体的特性而定. 需要注意的是: 这两个电容串联的值是并联在谐振回路上的, 会影响振荡频率。 当两个电容量相等时, 反馈系数是 0.5, 一般是可以满足振荡条件的, 但如果不易起振或振荡不稳定可以减小输入端对地电容量, 而增加输出端的值以提高反馈量。
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星通时频(SCTF)有源晶振选型表
目录- 有源晶振
型号- S7D27.120000D20F30T,S7D3.686400A20F30T,S3D30.000000D20F30T,S5D49.152000A20F30T,S3D49.152000D20F30T,S7D32.000000A20F30T,S7D27.000000B20F30T,S7D16.000000D20F30T,S5D32.000000D20F30T,S3D19.200000A20F30T,S3D50.000000B20F30T,S3D1.843200A20F30T,S7D36.000000B20F30T,S3D11.289600A20F30T,S5D4.096000A20F30T,S7D28.636360D20F30T,S7D11.059200B20F30T,S3D2.048000A20F30T,S5D7.372800D20F30T,S3D6.000000A20F30T,S5D25.000000B20F30T,S7D5.000000D20F30T,S3D4.096000B20F30T,S5D32.768KD20F30T,S5D33.000000D20F30T,S3D12.288000B20F30T,S7D2.000000A20F30T,S3D18.432000A20F30T,S5D29.491200B20F30T,S7D26.000000D20F30T,S7D33.330000B20F30T,S7D54.000000B20F30T,S3D2.457600D20F30T,S5D3.579545B20F30T,S7D4.915200D20F30T,S7D25.000000D20F30T,S5D2.000000D20F30T,S3D48.000000A20F30T,S5D16.000000B20F30T,S3D32.000000B20F30T,S7D8.192000D20F30T,S5D1.000000D20F30T,S5D3.686400B20F30T,S3D32.768KD20F30T,S5D4.000000B20F30T,S5D30.000000A20F30T,S7D4.000000A20F30T,S7D22.118400A20F30T,S3D13.560000A20F30T,S7D45.000000D20F30T,S7D33.333300D20F30T,S3D14.318180B20F30T,S3D22.579200A20F30T,S5D12.288000A20F30T,S7D4.000000D20F30T,S7D1.843200B20F30T,S3D33.000000B20F30T,S7D14.745600B20F30T,S3D48.000000D20F30T,S5D10.000000A20F30T,S5D7.372800B20F30T,S5D26.000000B20F30T,S5D49.1520000B20F30T,S7D54.000000D20F30T,S5D2.000000B20F30T,S7D6.000000D20F30T,S5D24.000000B20F30T,S7D27.000000D20F30T,S7D29.491200B20F30T,S5D22.118400A20F30T,S7D19.200000B20F30T,S3D20.000000A20F30T,S7D14.318180A20F30T,S7D6.144000A20F30T,S5D14.745600B20F30T,S7D8.000000B20F30T,S3D10.000000A20F30T,S3D24.000000B20F30T,S7D1.024000B20F30T,S7D33.000000A20F30T,S3D36.000000A20F30T,S3D4.915200A20F30T,S7D8.192000B20F30T,S7D33.333300B20F30T,S5D4.915200B20F30T,S7D16.000000B20F30T,S5D25.000000D20F30T,S3D2.457600A20F30T,S7D45.000000B20F30T,S3D32.000000D20F30T,S7D1.843200D20F30T,S7D5.000000B20F30T,S5D12.000000A20F30T,S5D50.000000D20F30T,S3D8.000000D20F30T,S3D18.432000D20F30T,S3D20.000000D20F30T,S3D3.579545A20F30T,S7D14.745600D20F30T,S5D1.000000A20F30T,S5D24.000000D20F30T,S7D6.000000B20F30T,S7D49.152000A20F30T,S5D24.576000A20F30T,S5D40.000000A20F30T,S7D16.384000B20F30T,S5D12.288000D20F30T,S7D32.768KB20F30T,S5D27.000000B20F30T,S3D14.318180D20F30T,S7D29.491200D20F30T,S7D8.192000A20F30T,S5D33.333000A20F30T,S3D2.048000D20F30T,S5D3.579545D20F30T,S5D1.000000B20F30T,S5D16.384000B20F30T,S3D26.000000A20F30T,S5D6.000000B20F30T,S3D3.686400B20F30T,S5D2.048000B20F30T,S5D13.560000B20F30T,S5D14.745600D20F30T,S5D11.289600A20F30T,S5D28.636360D20F30T,S3D16.000000B20F30T,S3D25.000000B20F30T,S7D3.686400D20F30T,S5D2.000000A20F30T,S5D19.200000A20F30T,S5D22.579200B20F30T,S7D30.000000A20F30T,S3D11.289600D20F30T,S7D32.768KD20F30T,S5D4.000000D20F30T,S7D4.096000B20F30T,S5D7.372800A20F30T,S5D4.096000D20F30T,S7D5.000000A20F30T,S7D2.457600D20F30T,S7D4.000000B20F30T,S3D33.330000A20F30T,S3D33.333000B20F30T,S5D32.000000A20F30T,S7D50.000000D20F30T,S5D12.288000B20F30T,S3D1.843200D20F30T,S5D36.000000B20F30T,S5D6.144000A20F30T,S3D24.000000D20F30T,S7D11.059200D20F30T,S7D24.576000A20F30T,S3D7.372800B20F30T,S3D33.333000A20F30T,S7D1.000000A20F30T,S3D10.000000B20F30T,S5D24.576000D20F30T,S5D13.560000A20F30T,S5D16.384000A20F30T,S5D2.048000A20F30T,S5D40.000000D20F30T,S5D22.579200A20F30T,S3D27.000000A20F30T,S5D6.144000B20F30T,S3D12.000000A20F30T,S3D14.318180A20F30T,S5D49.1520000D20F30T,S5D6.000000A20F30T,S7D14.745600A20F30T,S7D33.330000A20F30T,S3D22.579200D20F30T,S3D26.000000B20F30T,S5D20.000000D20F30T,S5D24.000000A20F30T,S3D13.560000D20F30T,S5D48.000000A20F30T,S3D7.372800D20F30T,S3D11.059200A20F30T,S7D4.915200B20F30T,S5D32.768KB20F30T,S5D5.000000B20F30T,S3D12.288000D20F30T,S3D27.000000D20F30T,S3D8.192000A20F30T,S3D12.000000B20F30T,S3D10.000000D20F30T,S5D36.000000A20F30T,S5D30.000000B20F30T,S5D8.000000A20F30T,S3D25.000000D20F30T,S5D18.432000B20F30T,S7D40.000000A20F30T,S7D14.318180D20F30T,S7D54.000000A20F30T,S5D19.200000B20F30T,S5D48.000000D20F30T,S3D22.118400A20F30T,S3D49.1520000B20F30T,S7D50.000000A20F30T,S5D8.000000D20F30T,S3D22.118400D20F30T,S7D4.096000A20F30T,S3D29.491200A20F30T,S3D33.333000D20F30T,S5D5.000000D20F30T,S5D18.432000A20F30T,S5D20.000000A20F30T,S5D8.000000B20F30T,S3D16.000000A20F30T,S5D16.384000D20F30T,S5D6.144000D20F30T,S3D33.333300A20F30T,S5D33.000000A20F30T,S5D28.636360B20F30T,S5D32.000000B20F30T,S7D33.330000D20F30T,S3D29.491200B20F30T,S3D3.686400A20F30T,S3D12.000000D20F30T,S7D4.915200A20F30T,S3D22.118400B20F30T,S5D33.000000B20F30T,S5D28.636360A20F30T,S5D6.000000D20F30T,S5D30.000000D20F30T,S7D2.457600B20F30T,S3D1.843200B20F30T,S5D48.000000B20F30T,S3D33.333300B20F30T,S7D2.000000B20F30T,S7D11.289600A20F30T,S7D12.288000B20F30T,S7D50.000000B20F30T,S3D4.915200B20F30T,S3D1.000000A20F30T,S3D6.144000A20F30T,S7D8.000000A20F30T,S7D33.333000D20F30T,S5D19.200000D20F30T,S5D14.745600A20F30T,S3D49.1520000A20F30T,S5D29.491200A20F30T,S3D13.560000B20F30T,S3D16.384000B20F30T,S3D22.579200B20F30T,S3D5.000000B20F30T,S7D2.457600A20F30T,S7D19.660800D20F30T,S7D22.118400B20F30T,S5D33.333000B20F30T,S3D14.745600D20F30T,S5D20.000000B20F30T,S3D26.000000D20F30T,S5D16.000000A20F30T,S7D7.37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【选型】晶光华(JGHC)贴片有源晶振 & 贴片无源晶振(物料型号对照表)选型指南
目录- 有源晶振/无源晶振
型号- S3227000121040,49SAC18080162060,S2126000121080,Y20600327122075,49SAC07600202060,S2232000091050JY,O32125000153325,S5325000201040,M49SAT08000201080,SMD2520,S32080001220500,G53080000850100A,GLASS5032,49SAT04000201080JY,O5326000153325,S2100327121090,49ASC28800202040,S3230000201040,49SAC25000182040,S5327000202040,MC30600327122050,S3224000151060,S3228375201060,O7540000153325,S3227000201040,49ASC60350202040,49SAT25000201040JY,S5312000201080,S53080001510100A,S3240000121060,G53080000830100A,OSC2016,49SAC24000201040,49SBT06745201060,O5316000153325,OSC3225,S3224000151050,49SBT12000181060,M49SAT24000121060,O7512000153325,HC-49S,49SAC16000201060,S3224000121060A,O2200327153325,G5308000201080,49SAC035792020100,49ASC27138152040,O7520000153325,S3224000121060,S2224000121060JY,S5313253201060,O3200327151825,49SAT26000201040JY,G3216000183080,SMD3100327122090,S2224000091060JY,G3212288121080,O5300327153325,O5308000153325,49SAC04096202080,HC-49SMD,S2132000101080,O7527000153325,49SAC04194202080,S5312000202080A,O7512288153325,49SAC16934182060,S3212000121080,O22088001533100,49ASC27000182040,49SBT33868201040,O7550000153325,S32300000651040,S2132000121080,S5319687141040A,S3224000061050,49SAC22118202040,49SBT04000201080,S5313560152040A,S3212000201080,S3232000081040,49ASC26000202040,P7426000091040,S712000201040,49SAC08000202060,O7525000153325,O2100327153325,49SAC24000122040,O3225000153325,S3225000121060,49SAT08000201060,S3216000121060,S2240000101050JY,S32120002010100A,O3237125153325,J3224000091080,49SAC26000152040,49SAC16000222060,49SAT13560161050JY,O3216000153325,HC-49SSMD,O7524000153325,TCO22260002805,Y20600327122040,O5340000153325,S2140000091070JY,49SAC25000122040,S2227120101080,G3232000121060A,O3212288153325,49SAC24545082040JY,O3226000153325,S2132000091080,S5340659081540,49SAC10000201060,S2226000071060,S3224000201060,S3213000201060JY,49SAC27000182040,49SAC20000202040,S2219200121080,PFP7040,49ASC50000201040,O5324000153325,S5318080141040A,49SAC036862020100,O3240000153330JY,S3230000201060,49SBT25000181040,TCXO2520,G3226000161060,O3248000153325,S3237400201040JY,S3226000091060,S3219200071060,S3240000121040,S2240000101050,49ASC40233202030,G3224000102060,TSX22260000781040,S5348000202040,OSC7050,SMD3225,SMD2016,O75100000153325,O2224000153325,S3214318201060,S3227000181040,MC14600327122090,49SAC06745202060,S3250000121060,O3240000153325,S3240000101040,O75125000153325,49SAC36480122040,S724000101030,J3225000121080,S2216000091080,O7502048153325,O5324576153325,S22160000910100JY,O5320000153325,M49SAT26000091060,S3232000091040,49SAC10000132060,S3213253202070,S2132000091070JY,49SAC25000201040,S2226000120860,O5312288153325,S3230000101040,SMD3100327092090,O32540001533525,O2227000153325,Y30800327122075,49SAT14318201060,O3204000153325,SMD6035,49SAC08000182060,49SAC20500202040,O3227000153325,O3200327153320JY,49SAC21250182040,S3212000181080,O3233330153325,49SAC260000852040,O5310000153325,S2226000091060JY,O3232000153325,S3226000081040,49ASC27120102040,S720000202040,O3250000153325,O2250000153325,S2126000091080,G5308000123080,S5324000201040,G3232000121050,S2100327072090,O5327000153325,O5312000153325,S5308000201080,S2225000181060,O2220000153325,O3218432153325,O7508000153325,O22072001533100,S3213560201060,S2124000121080JY,O3220000153325,S3216000091060,S3237400121040,49SAC17950162060,OSC2520,49SBT04904201060,49SAC06000202060,49SBT26000151040,49SAC12000202060,S3224000121060JY,O7533000153325,O75125000LD3320,O7511059153325,S3220000181060,O2224576153325,O5325000153325,49SAC08000163060,49ASC32768202030,S3224576202040,S2250000091050,S3225000151040,49SAC08192202060,M49SAT16000091060,O3206000153325,O2212000153325,S32080002010500,O3224576153325,TSX2226000091040,O3212000153325,49SBT24000181040,S2226000081060,S3219200101060,S3226000121060,O5350000153325,49SAT04000201080,SMD5032,S3224576121060,49SAC13560101060,G3225000201060,S5308000222080,S5308704223080,S5313526142040A,S3212000101080,O2225000153325,O2237125153325,S5313526141060,49SAC11059202060,HC-49SBSMD,S3216000091060JY,TSX2226000071040,Y20624000202050JY,M49SAT12000121060,4SSAC27000202040,49SAC04897202080,S3240000091040JY,49SAC13560201060,S3225000201060,TCO22384001805,S6316000202040,49SAC04000202080,49SAC13598102060,M49SAT27000201060,49SAC16934202060,49SAC08000FS2060,S3232000121040,S2132000081070JY,G3236864062050,J3220000181080,O7524576153325,S2125000101080,S21160000910120JY,S3226000071060,S3218080141080A,S3240000151040,M49SSMD,49SAC27000202030JY,G3226000071060,S3240000101060JY,S2216000121080,49SAC16000182060,O3227000153320JY,49ASC27125202040,S3226000091040JY,G3225000101560A,49SAC14745202060,O7548000153325,S5327000181040,O2248000153325,49SAC16000202060,S3227141201060A,S2240000091050JY,O3230000153325,O32100000153325,O7510000153325,O3224000153325,49SAC20480202040,OSC5032,S3216000201060,G3236864062060A,S2126000091080JY,O5348000153325,49SAC25000202040
【经验】晶体振荡器匹配电容计算及其电路介绍
本文介绍了晶体的匹配原理、计算公式、负载电容、引脚等等。
设计经验 发布时间 : 2017-11-28
Epson(爱普生) TG-5500CA/TG-5501CA温补晶体振荡器 数据手册(详细版)
型号- X1G003901003400,X1G003901000099,TG-5500CA,TG-5501CA,X1G003901000311,TG-5500,TG-5501,X1G003901000099-30.72M
Epson(爱普生) 晶体振荡器可编程SG-8002系列数据手册(中文)
型号- Q3203DBX1XXXX00,Q3309CA30024411,Q3309CAX0XXXX00,Q3309CA40004900,Q3321CE40004914,Q3323LBXXXXXX00,SG-8002CE,Q3307JC21027200,SG-8002CA,Q3308JFX1XXXX00,Q3306JA41002411,Q3309CA40003600,Q3307JCX1XXXX00,SG-8002JF,SG-8002JC,SG-8002JA,SG-8002LA,SG-8002LB,SG-8002,Q3306JAX1XXXX00,Q3323LB41020411,Q3204DCX1XXXX00,SG-8002DC,Q3309CA20046312,SG-8002DB,Q3321CEXXXXXX00,Q3306JA41002400
【产品】1~125MHz可编程晶体振荡器SG-8002JC、SG-8002JA,3.3V/5.0V&CMOS和TTL兼容
由EPSON推出的SG-8002JC、SG-8002JA系列为可编程晶体振荡器,具有较低的电流消耗和较高的稳定性,可兼容CMOS和TTL,电源电压具有3.3V和5.0V可选。电源电压为5.0V时可提供1MHz~125MHz的频率(PT/ST、PH/SH),电源电压为3.3V时可提供1MHz~125MHz(PC/SC)和1MHz~66.7MHz(PC/SC)的频率范围可选,可更合理地适用于更多应用场
新产品 发布时间 : 2018-10-03
X1G0061310002xx SG2016EGN 156.250000MHz CJGPZA Crystal Oscillator (SPXO)
型号- SG3225EEN FAMILY,SG2520EGN,SG3225EEN,X1G0061310002XX,SG2016EGN,X1G005881XXXXXX,X1G006131XX,X1G005881XXXX15,SG2016EGN156.250000MHZCJGPZA,X1G006131XXXX15
YXC有源晶振YSO110TR系列,频点50MHZ,超小体积2520封装,应用于激光测距仪
若激光测距仪对电路板有特殊要求,可以使用YXC有源晶振系列,具有高频、高精度、小体积的性能优势,无需外接电路,安装方便快捷。针对小体积需求YXC推出的有源晶振YSO110TR系列中OT3JI-111-50M,工业级温度-40~85℃,能够适应严苛的工作环境变化,保证系统运作稳定,广泛应用于激光测距仪、激光卷尺、电子望远镜等产品。
应用方案 发布时间 : 2024-07-25
Epson(爱普生) SG-3030JF(Q3102JF020001XX)32.7680KHz频率范围有源晶振数据手册
描述- 32.7680KHz SG-3030JF(Q3102JF020001XX)有源晶振数据手册
型号- SG-3030JF,SG-3030JF 32.768000 KHZ,SG-3030JF32.768000KHZB,SG3030JF,SG-3030JF 32.768000 KHZ B,SG-3030JF 32.768K,Q3102JF020001,Q3102JF02000111,Q3102JF020001XX,Q3102JF020001XX,SG-3030JF 32.768KHZ
TG5032CFN/TG5032SFN温补晶体振荡器数据手册
型号- X1G004441000099,X1G004571000900,TG5032CAN,TG5032CBN,X1G004441001400,X1G004431000099,X1G005401XXXXXX,X1G005391XXXXXX,TG5032SFN,TG5032SAN,TG5032SBN,TG5032,X1G004431000099-25MHZ,TG5032CFN30.720000MHZCAGNDA,X1G004431000900,TG5032CFN
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可来图定制均温板VC尺寸50*50mm~600*600 mm,厚度1mm~10mm,最薄0.3mm。当量导热系数可达10000W/M·K,散热量可达10KW, 功率密度可达50W/cm²。项目单次采购额需满足1万元以上,或年需求5万元以上。
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