DSB221SDN温补晶振1XXB26000MAA就这样被国产晶振给开除了?
来源:http://taiheth.com 作者:泰河电子技术部 2017年03月23
很多客户都会经常在问温补晶振也是属于有源晶振的一种,那为什么会和石英晶体振荡器会有着天大的区别呢,一个在天上,一个在地下.温补晶振与普通的石英晶体振荡器的不同就是温补晶振的精度会比石英晶体振荡器的性能要更高,稳定性会更强.对于晶振频率来说,温补晶振可以起到一个温度补偿的作用.温补晶振也称TCXO晶振,传统的TCXO晶振提通过采用模拟器件进行温度补偿,通过改变振荡回路中的 负载电容等模拟器件让其随着温度变化来补偿晶体谐振器由于环境温度变化所生产的频率漂移.
随着时间的变化,科学的进步,不少的产品都采用到了数字化补偿技术.渐渐的TCXO晶振就慢慢的被推向了全世界.数字化的补偿的温补晶振又叫DTCXO,还有种单片机进行补偿的温补晶振称之为MCXO.数字化补偿技术可以实现晶振自动温度补偿,让石英晶体振荡器的频率稳定度非常高.同样也可以适应更宽的工作温度范围.温补晶振被广泛应用到北斗定位系统,GPS卫星导航仪等其它领域.GPS定位导航系统是温补晶振1XXB26000MAA用得比较多.
卫星导航是空间信息基础设施,北斗卫星导航系统空间段由5颗静止轨道卫星和30颗非静止轨道卫星组成,中国计划2012年左右,“北斗”系统将覆盖亚太地区,2020年左右覆盖全球。中国正在实施北斗卫星导航系统建设,已成功发射16颗北斗导航卫星。根据系统建设总体规划,2012年左右,系统将首先具备覆盖亚太地区的定位、导航和授时以及短报文通信服务能力。2020年左右,建成覆盖全球的北斗卫星导航系统.为什么现在的卫星导航这么受欢迎,实际上,卫星是可以精确的知道所需要的位置,只需要使用采用过DSB221SDN温补晶振的接收器,就可以很快的定位出想要知道,或者是指定目标性的地点方位.中国北斗卫星导航系统是继美国GPS、俄罗斯格洛纳斯、欧洲伽利略之后的全球第四大卫星导航系统,世界级别的产品选电子配件也是容不得有半点闪失的.晶振称之为线上的心脏,最主要的是因为晶振就是整个电路板的中心点,只要稍稍有一点点的误差,那就会使得整个板子"瘫痪".这可不是开啥国际玩笑,并且这也一点也不好笑.温补晶振一直都是以高精度高质量为重任.
Environmental Characteristics
卫星导航是空间信息基础设施,北斗卫星导航系统空间段由5颗静止轨道卫星和30颗非静止轨道卫星组成,中国计划2012年左右,“北斗”系统将覆盖亚太地区,2020年左右覆盖全球。中国正在实施北斗卫星导航系统建设,已成功发射16颗北斗导航卫星。根据系统建设总体规划,2012年左右,系统将首先具备覆盖亚太地区的定位、导航和授时以及短报文通信服务能力。2020年左右,建成覆盖全球的北斗卫星导航系统.为什么现在的卫星导航这么受欢迎,实际上,卫星是可以精确的知道所需要的位置,只需要使用采用过DSB221SDN温补晶振的接收器,就可以很快的定位出想要知道,或者是指定目标性的地点方位.中国北斗卫星导航系统是继美国GPS、俄罗斯格洛纳斯、欧洲伽利略之后的全球第四大卫星导航系统,世界级别的产品选电子配件也是容不得有半点闪失的.晶振称之为线上的心脏,最主要的是因为晶振就是整个电路板的中心点,只要稍稍有一点点的误差,那就会使得整个板子"瘫痪".这可不是开啥国际玩笑,并且这也一点也不好笑.温补晶振一直都是以高精度高质量为重任.
Electrical Characteristics (TA=-40~+85?C, LOAD_R//C=10kΩ//10pF, VCC=+1.8V or +2.2V or +2.8V, unless otherwise noted) | |||||||
Item | Conditions | Limits | unit | Notes | |||
min. | typ | max. | |||||
1 | Current Consumption | - | - | 1.5 | mA | ||
2 | Output Level | 0.8 | - | - | VP-P | 1 | |
3 | Symmetry | GND level (DC cut) | 40/60 | - | 60/40 | % | |
4 | Frequency Stability 1.Tolerance | After 2 times reflow | - | - | ±1.5 | ppm | 2,3 |
2.vs Temperature | TA=-30~+85?C | - | - | ±0.5 | ppm | 4 | |
TA=-40~-30?C | - | - | ±1.0 | ppm | 4 | ||
3.vs Drift Rate/Slope | @ 0.3?C/s | ±10.0 | ppb/s | ||||
4.vs Hysteresys | - | - | ±0.6 | ppm | |||
5.vs Supply Voltage | VCC=+1.8V±5%,+2.2V±5%,+2.8V±5% | - | - | ±0.1 | ppm | ||
6.vs Load Variation | LOAD_R//C=(10kΩ//10pF)±10% | - | - | ±0.1 | ppm | ||
7.vs Aging | TA=Room ambient | - | - | ±1.0 | ppm/year | ||
TA=Room ambient | - | - | ±1.5 | ppm/2years | |||
TA=Room ambient | - | - | ±2.5 | ppm/5years | |||
TA=Room ambient | - | - | ±5.0 | ppm/10years | |||
5 | G Sensitivity | Gamma Vector of all 3axes from 30 to 1500Hz | - | - | ±2.0 | ppb/G | |
6 | Start Up Time | @90% of final VOUT level | - | - | 2.0 | ms | |
7 | SSB Phase Noise | Relative to f0 level offset 1Hz | - | - | -50 | dBc/Hz | |
Relative to f0 level offset 5Hz | - | - | -73 | dBc/Hz | |||
Relative to f0 level offset 10Hz | - | - | -80 | dBc/Hz | |||
Relative to f0 level offset 100Hz | - | - | -106 | dBc/Hz | |||
Relative to f0 level offset 1kHz | - | - | -134 | dBc/Hz | |||
Relative to f0 level offset 10kHz | - | - | -144 | dBc/Hz | |||
Relative to f0 level offset 100kHz | - | - | -152 | dBc/Hz | |||
Notes 1. Clipped sine wave (DC-coupled) 2. Ref. to nominal frequency 3. Please leave after reflow in 2h or more at room ambient. 4. Ref. to frequency (TA=+25?C) |
Mechanical Characteristics All test is performed after 3times reflow (Clause.13) except 10.10 (Resistance to soldering heat) | |||
Item | Description | Requirements | |
Drop | Natural drop (On concrete) Mounting on the set or test fixture.(Total weight 100g) Height : 150cm Direction : X,Y,Z, 6directions Test cycle : 3cycles Reference specification : EIAJ-ED-4702A Method5 | df/f=<±1.0ppm | |
Vibration | Sweep range : 10~500Hz Sweep speed : 11min/cycle Amplitude : 1.5mm (10~55Hz) Acceleration : 200m/s2 (55~500Hz) Direction : X,Y,Z, 3directions Test cycle : 10cycles Reference specification : IEC 60068-2-6 | df/f=<±0.5ppm | |
Shock | Acceleration : 1000m/s2 Direction : X,Y,Z, 6directions Duration : 6ms Test cycle : 3cycles/each directions Reference specification : IEC 60068-2-27 | df/f=<±0.5ppm | |
PCB bend strength | PWB : t=1.6mm Pressure speed : 1.0mm/s Bend width : 1 2 3mm Duration : 10±1s Reference specification : IEC 60068-2-21 Ue1 | df/f=<±0.5ppm No visible damage. No leak damage. | |
Adherence nature | PWB : t=1.6mm Direction : X,Y, 2directions Pressure : 10N Duration : 10±1s Reference specification : IEC 60068-2-21 Ue3 | df/f=<±0.5ppm No visible damage. No leak damage. | |
Package strength | Pressure : 10N Duration : 10±1s Reference specification : IEC 60068-2-77 | df/f=<±0.5ppm No mechanical damage. No leak damage. | |
Gross leak | It is immersed for 3min into +125±5?C Chlorofluorocarbon (CFCs) liquid. Reference specification : IEC 60068-2-17 | No continuous air bubbles. | |
Fine leak | It shall be measured by the helium leak detector after pressurization for 60min by the pressure of (3.92±0.49) x105 Pa in a helium gas atmosphere. Reference specification : IEC 60068-2-17 | Less than 1.0x10-9Pa m3/s. | |
Solderability | Solder bath temperature : +245±5?C Duration : 3±0.3s Reference specification : IEC 60068-2-58 | A new uniform coating of solder shall cover a minimum of 95% of the surface being immersed. | |
Resistance to soldering heat | 1) Solder iron method Bit size : B(φ3) Bit temperature : +350±10?C Duration : 3+1/-0s /each terminal It shall be measured after 2h at room temperature, humidity. Reference specification : IEC 60068-2-20 | df/f=<±0.5ppm dVOUT=<±0.2VP-P No visible damage. | |
2) Reflow In refer to temperature profile shown in clause13. Test cycle : 3cycles It shall be measured after 2h at room temperature, humidity. Reference specification : IEC 60068-2-58 | df/f=<±1.0ppm dVOUT=<±0.2VP-P No visible damage. |
Environmental Characteristics
Item | Description | Requirements | |
1 | Low temperature storage | Temperature : -40±3?C Duration : 1000h It shall be measured after 2h at room temperature, humidity. Reference specification : IEC 60068-2-1 Ab | df/f=<±1.0ppm dVOUT=<±0.2VP-P The electrical characteristics are satisfied. |
2 | High temperature storage | Temperature : +85±2?C Duration : 1000h It shall be measured after 2h at room temperature, humidity. Reference specification : IEC 60068-2-2 Bb | df/f=<±1.0ppm dVOUT=<±0.2VP-P The electrical characteristics are satisfied. |
3 | Humidity | Temperature : +85±2?C R.H. 85±5% Duration : 1000h It shall be measured after 2h at room temperature, humidity. Reference specification : IEC 60068-2-3 | df/f=<±1.0ppm dVOUT=<±0.2VP-P The electrical characteristics are satisfied. |
4 | HTB | Temperature : +85±2?C Duration : 1000h BIAS : Max value of supply voltage It shall be measured after 2h at room temperature, humidity. Reference specification : IEC 60068-2-2 Bb | df/f=<±1.0ppm dVOUT=<±0.2VP-P The electrical characteristics are satisfied. |
5 | THB | Temperature : +40±2?C R.H. 90~95% Duration : 1000h BIAS : Max value of supply voltage It shall be measured after 2h at room temperature, humidity. Reference specification : IEC 60068-2-3 | df/f=<±1.0ppm dVOUT=<±0.2VP-P The electrical characteristics are satisfied. |
6 | Thermal shock | Thermal shock : -40±3?C : 0.5h ⇔ +85±2?C : 0.5h Test cycle : 200cycles Shift time : 2~3min It shall be measured after 2h at room temperature, humidity. Reference specification : IEC pub.68-2-14.Na | df/f=<±1.0ppm dVOUT=<±0.2VP-P The electrical characteristics are satisfied. |
7 | ESD | Model : Machine Model (MM) V=±200V (C1=200pF, R1=0Ω) Number of times : 3times Each terminal except common terminal. (Connect to test terminal) Reference specification : EIA/JESD22-A114 | df/f=<±1.0ppm dVOUT=<±0.2VP-P The electrical characteristics are satisfied. |
Model : Human Body Model (HBM) | |||
V=±1500V (C1=100pF, R1=1500Ω) | df/f=<±1.0ppm | ||
Number of times : 3times | dVOUT=<±0.2VP-P | ||
Each terminal except common terminal. | The electrical characteristics | ||
(Connect to test terminal) | are satisfied. | ||
Reference specification : EIA/JESD22-A115 |
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此文关键字: 温补晶振的应用定位导航晶振专用晶振
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