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当前位置首页 » 常见问题 » 温度变化对石英晶体的影响CM200C32768EZFT

温度变化对石英晶体的影响CM200C32768EZFT

返回列表 来源:金洛鑫 浏览:- 发布日期:2023-06-20 16:50:20【
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如今,没有石英晶体的节假日是不可想象的!为什么?因为即使是现代的户外照明时间开关也需要石英来获得准确的时间基准。此外,我们的许多礼物都是基于最先进的电子产品。手机、智能手表、个人电脑——它们都需要高精度的频率给定元件来相互通信。如果没有这种交流,它们的用处就会受到严重限制,甚至不存在。这些设备通常从石英接收必要的驱动节奏,石英是这种设备的现代“心脏”。

振荡晶体会随着温度的变化而改变其行为和电气特性。因此,温度变化会导致频率偏差。这种偏差以“百万分之几(ppm)来衡量,这意味着:1ppm =百万分之一= 0.000001 = 0.0001%。AT切割晶体的温度敏感性

MHz范围内的振荡晶体也称为AT切割晶体。它们包含薄石英晶片,即所谓的石英坯。at切割石英坯是以35°的AT角从石英块上切割下来的。坯件的厚度基本上决定了室温下的基频。然而,石英坯从石英块上切割下来的准确角度是造成其他温度下频率偏差的原因。如果在切割过程中非常精确地达到35° 15′的理想角度,石英对温度的敏感度就会降低。

如下图,您可以看到不同的切割角度选项

1

温度灵敏度是三次抛物线的函数。在切割过程中,即使是单角秒范围内的最小误差也会导致曲线围绕拐点旋转。这恶化了后续应用所需温度范围内的温度灵敏度。在坯件的制造过程中,由于可能的最大制造精度,完美的切割角度只能在有限的范围内实现。因此,制造的毛坯必须根据它们的偏差进行分类,并根据它们的精度用于合适的晶体。

2

图1:由交角偏差产生的频率偏差对温度的曲线


音叉晶体的温度依赖性

对于音叉石英晶体(也称为时钟晶体),倒抛物线的函数描述了频率的温度依赖性。在这种情况下,温度相关频率偏差为0 ppm时的抛物线顶点在25°c,在较低和较高的温度下,例如在该点的左侧和右侧,频率逐渐下降,并且符合二次曲线。如果电路中的石英调整正确,将会有一个与温度相关的滞后,例如实时时钟。应用程序的开发人员一定要考虑到这一点。

3

图2:抛物线描述了音叉晶体频率的温度依赖性


这对应用程序意味着什么?

两条温度曲线都表明极端温度对石英晶体的频率有影响。对于大多数应用而言,与温度相关的微小频率变化(例如-40°C至+85°C范围内的+/-15 ppm)不成问题。然而,如果需要更精确的频率,建议使用温度补偿晶体振荡器,称为TCXO晶振。这提供了非常高的频率精度,即使在很宽的温度范围内也能达到几个ppm。

如有任何需求可以随时联系我们,我们很乐意为您的应用选择合适的时钟发生器提供建议。

原厂编码 生产厂家 型号 频率 频率偏差 负载电容 工作温度
CM13032768DZFT Citizen 晶振 CM130 32.768kHz ±20ppm 12.5pF -40°C ~ 85°C
CM13032768DZFT Citizen 晶振 CM130 32.768kHz ±20ppm 12.5pF -40°C ~ 85°C
CFS-20632768DZFB Citizen 晶振 CFS-206 32.768kHz ±20ppm 12.5pF -20°C ~ 70°C
CM200C32768AZFT Citizen 晶振 CM200C 32.768kHz ±30ppm 12.5pF -40°C ~ 85°C
CM200C32768AZFT Citizen 晶振 CM200C 32.768kHz ±30ppm 12.5pF -40°C ~ 85°C
CM200C32768DZFT Citizen 晶振 CM200C 32.768kHz ±20ppm 12.5pF -40°C ~ 85°C
CM200C32768DZFT Citizen 晶振 CM200C 32.768kHz ±20ppm 12.5pF -40°C ~ 85°C
CM200C32768DZFT Citizen 晶振 CM200C 32.768kHz ±20ppm 12.5pF -40°C ~ 85°C
CM200C32768EZFT Citizen 晶振 CM200C 32.768kHz ±10ppm 12.5pF -40°C ~ 85°C
CM200C32768EZFT Citizen 晶振 CM200C 32.768kHz ±10ppm 12.5pF -40°C ~ 85°C
CM200C32768EZFT Citizen 晶振 CM200C 32.768kHz ±10ppm 12.5pF -40°C ~ 85°C
CFS-20632768HZFB Citizen 晶振 CFS-206 32.768kHz ±5ppm 12.5pF -20°C ~ 70°C
CM250C100000AZFT Citizen 晶振 CM250C 100kHz ±30ppm 12.5pF -40°C ~ 85°C
CM250C100000AZFT Citizen 晶振 CM250C 100kHz ±30ppm 12.5pF -40°C ~ 85°C
CM250C100000AZFT Citizen 晶振 CM250C 100kHz ±30ppm 12.5pF -40°C ~ 85°C
CM250C32000AZFT Citizen 晶振 CM250C 32kHz ±30ppm 12.5pF -40°C ~ 85°C
CM250C32000AZFT Citizen 晶振 CM250C 32kHz ±30ppm 12.5pF -40°C ~ 85°C
CM250C32000AZFT Citizen 晶振 CM250C 32kHz ±30ppm 12.5pF -40°C ~ 85°C
CM250C96000AZFT Citizen 晶振 CM250C 96kHz ±30ppm 12.5pF -40°C ~ 85°C
CM250C96000AZFT Citizen 晶振 CM250C 96kHz ±30ppm 12.5pF -40°C ~ 85°C
CM250C96000AZFT Citizen 晶振 CM250C 96kHz ±30ppm 12.5pF -40°C ~ 85°C
CM41532768DZCT Citizen 晶振 CM415 32.768kHz ±20ppm 9pF -40°C ~ 85°C
CM41532768DZCT Citizen 晶振 CM415 32.768kHz ±20ppm 9pF -40°C ~ 85°C
CM41532768DZCT Citizen 晶振 CM415 32.768kHz ±20ppm 9pF -40°C ~ 85°C
CM41532768DZFT Citizen 晶振 CM415 32.768kHz ±20ppm 12.5pF -40°C ~ 85°C
CM41532768DZFT Citizen 晶振 CM415 32.768kHz ±20ppm 12.5pF -40°C ~ 85°C
CM41532768DZFT Citizen 晶振 CM415 32.768kHz ±20ppm 12.5pF -40°C ~ 85°C
CFS-20632768AZFB Citizen 晶振 CFS-206 32.768kHz ±20ppm 12.5pF -20°C ~ 70°C
CFS-20632768DZYB Citizen 晶振 CFS-206 32.768kHz ±20ppm 7pF -20°C ~ 70°C
CFS-20632768DZCB Citizen 晶振 CFS-206 32.768kHz ±20ppm 9pF -20°C ~ 70°C
CM200C32768DZBT Citizen 晶振 CM200C 32.768kHz ±20ppm 6pF -40°C ~ 85°C
CM200C32768DZBT Citizen 晶振 CM200C 32.768kHz ±20ppm 6pF -40°C ~ 85°C
CM200C32768DZBT Citizen 晶振 CM200C 32.768kHz ±20ppm 6pF -40°C ~ 85°C
CFS-20632768EZBB Citizen 晶振 CFS-206 32.768kHz ±10ppm 6pF -20°C ~ 70°C
CFS-20632768EZFB Citizen 晶振 CFS-206 32.768kHz ±10ppm 12.5pF -20°C ~ 70°C
CM2012H32768DZFT Citizen 晶振 CM2012H 32.768kHz ±20ppm 12.5pF -40°C ~ 85°C
CM2012H32768DZFT Citizen 晶振 CM2012H 32.768kHz ±20ppm 12.5pF -40°C ~ 85°C
CM2012H32768DZFT Citizen 晶振 CM2012H 32.768kHz ±20ppm 12.5pF -40°C ~ 85°C
CM41532768DZYT Citizen 晶振 CM415 32.768kHz ±20ppm 7pF -40°C ~ 85°C
CM41532768DZYT Citizen 晶振 CM415 32.768kHz ±20ppm 7pF -40°C ~ 85°C
CM41532768DZYT Citizen 晶振 CM415 32.768kHz ±20ppm 7pF -40°C ~ 85°C
CFV-20632000AZFB CITIZEN 晶振 CFV-206 32kHz ±30ppm 12.5pF -20°C ~ 70°C
CFS-14532768DZFB Citizen 晶振 CFS145 32.768kHz ±20ppm 12.5pF -20°C ~ 70°C
CFV-20638400AZFB Citizen 晶振 CFV-206 38.4kHz ±30ppm 12.5pF -20°C ~ 70°C
CM250C77503AZFT Citizen 晶振 CM250C 77.503kHz ±30ppm 12.5pF -40°C ~ 85°C
CM250C77503AZFT Citizen 晶振 CM250C 77.503kHz ±30ppm 12.5pF -40°C ~ 85°C
CM250C77503AZFT Citizen 晶振 CM250C 77.503kHz ±30ppm 12.5pF -40°C ~ 85°C
CFV-20677503DZFB Citizen 晶振 CFV-206 77.503kHz ±20ppm 12.5pF -20°C ~ 70°C
CFV-20675000DZFB Citizen 晶振 CFV-206 75kHz ±20ppm 12.5pF -20°C ~ 70°C
CM13032768DZYT Citizen 晶振 CM130 32.768kHz ±20ppm 7pF -40°C ~ 85°C
CM13032768DZYT Citizen 晶振 CM130 32.768kHz ±20ppm 7pF -40°C ~ 85°C
CM13032768DZYT Citizen 晶振 CM130 32.768kHz ±20ppm 7pF -40°C ~ 85°C
CM200C32768DZCT Citizen 晶振 CM200C 32.768kHz ±20ppm 9pF -40°C ~ 85°C
CM200C32768DZCT Citizen 晶振 CM200C 32.768kHz ±20ppm 9pF -40°C ~ 85°C
CM200C32768DZCT Citizen 晶振 CM200C 32.768kHz ±20ppm 9pF -40°C ~ 85°C
CM200C32768DZYT Citizen 晶振 CM200C 32.768kHz ±20ppm 7pF -40°C ~ 85°C
CM200C32768DZYT Citizen 晶振 CM200C 32.768kHz ±20ppm 7pF -40°C ~ 85°C
CM200C32768DZYT Citizen 晶振 CM200C 32.768kHz ±20ppm 7pF -40°C ~ 85°C
CM250C60000AZFT Citizen 晶振 CM250C 60kHz ±30ppm 12.5pF -40°C ~ 85°C
CM250C60000AZFT Citizen 晶振 CM250C 60kHz ±30ppm 12.5pF -40°C ~ 85°C
CM250C60000AZFT Citizen 晶振 CM250C 60kHz ±30ppm 12.5pF -40°C ~ 85°C
CM250C77500AZFT Citizen 晶振 CM250C 77.5kHz ±30ppm 12.5pF -40°C ~ 85°C
CM250C77500AZFT Citizen 晶振 CM250C 77.5kHz ±30ppm 12.5pF -40°C ~ 85°C
CM250C77500AZFT Citizen 晶振 CM250C 77.5kHz ±30ppm 12.5pF -40°C ~ 85°C
CM250C36000AZFT Citizen 晶振 CM250C 36kHz ±30ppm 12.5pF -40°C ~ 85°C
CM250C36000AZFT Citizen 晶振 CM250C 36kHz ±30ppm 12.5pF -40°C ~ 85°C
CM250C36000AZFT Citizen 晶振 CM250C 36kHz ±30ppm 12.5pF -40°C ~ 85°C
CM250C38000AZFT Citizen 晶振 CM250C 38kHz ±30ppm 12.5pF -40°C ~ 85°C
CM250C38000AZFT Citizen 晶振 CM250C 38kHz ±30ppm 12.5pF -40°C ~ 85°C
CM250C38000AZFT Citizen 晶振 CM250C 38kHz ±30ppm 12.5pF -40°C ~ 85°C
CM250C38400AZFT Citizen 晶振 CM250C 38.4kHz ±30ppm 12.5pF -40°C ~ 85°C
CM250C38400AZFT Citizen 晶振 CM250C 38.4kHz ±30ppm 12.5pF -40°C ~ 85°C
CM250C38400AZFT Citizen 晶振 CM250C 38.4kHz ±30ppm 12.5pF -40°C ~ 85°C
CM41532768EZFT Citizen 晶振 CM415 32.768kHz ±10ppm 12.5pF -40°C ~ 85°C
CM41532768EZFT Citizen 晶振 CM415 32.768kHz ±10ppm 12.5pF -40°C ~ 85°C
CM41532768EZFT Citizen 晶振 CM415 32.768kHz ±10ppm 12.5pF -40°C ~ 85°C
CFV-206100000AZFB Citizen 晶振 CFV-206 100kHz ±30ppm 12.5pF -20°C ~ 70°C
CFV-20640000AZFB Citizen 晶振 CFV-206 40kHz ±30ppm 12.5pF -20°C ~ 70°C
CFV-20632000DZFB Citizen 晶振 CFV-206 32kHz ±20ppm 12.5pF -20°C ~ 70°C
CFV-20665536AZFB Citizen 晶振 CFV-206 65.536kHz ±30ppm 12.5pF -20°C ~ 70°C
CFV-20636000AZFB Citizen 晶振 CFV-206 36kHz ±30ppm 12.5pF -20°C ~ 70°C
CFS-20632768EZYB Citizen 晶振 CFS-206 32.768kHz ±20ppm 7pF -20°C ~ 70°C
CFV-20668500DZFB Citizen 晶振 CFV-206 68.5kHz ±20ppm 12.5pF -20°C ~ 70°C
CFV-20668503DZFB Citizen 晶振 CFV-206 68.5kHz ±20ppm 12.5pF -20°C ~ 70°C
CFV-20640003DZFB Citizen 晶振 CFV-206 40kHz ±20ppm 12.5pF -20°C ~ 70°C
CFV-20660003DZFB Citizen 晶振 CFV-206 60kHz ±20ppm 12.5pF -20°C ~ 70°C
CFV-20660000DZFB Citizen 晶振 CFV-206 60kHz ±20ppm 12.5pF -20°C ~ 70°C
CFV-20640000DZFB Citizen 晶振 CFV-206 40kHz ±20ppm 12.5pF -20°C ~ 70°C
CFV-20660000AZFB Citizen 晶振 CFV-206 60kHz ±30ppm 12.5pF -20°C ~ 70°C
CFV-20676800AZFB Citizen 晶振 CFV-206 76.8kHz ±30ppm 12.5pF -20°C ~ 70°C
CFV-20696000AZFB Citizen 晶振 CFV-206 96kHz ±30ppm 12.5pF -20°C ~ 70°C
CM250C76800AZFT Citizen 晶振 CM250C 76.8kHz ±30ppm 12.5pF -40°C ~ 85°C
CM250C76800AZFT Citizen 晶振 CM250C 76.8kHz ±30ppm 12.5pF -40°C ~ 85°C
CM250C76800AZFT Citizen 晶振 CM250C 76.8kHz ±30ppm 12.5pF -40°C ~ 85°C
CM200C32768HZFT Citizen 晶振 CM200C 32.768kHz ±5ppm 12.5pF -40°C ~ 85°C
CM200C32768HZFT Citizen 晶振 CM200C 32.768kHz ±5ppm 12.5pF -40°C ~ 85°C
CM200C32768HZFT Citizen 晶振 CM200C 32.768kHz ±5ppm 12.5pF -40°C ~ 85°C
CM250C40000AZFT Citizen 晶振 CM250C 40kHz ±30ppm 12.5pF -40°C ~ 85°C
CM250C40000AZFT Citizen 晶振 CM250C 40kHz ±30ppm 12.5pF -40°C ~ 85°C
CM250C40000AZFT Citizen 晶振 CM250C 40kHz ±30ppm 12.5pF -40°C ~ 85°C
CM200C32768AZBT Citizen 晶振 CM200C 32.768kHz ±30ppm 6pF -40°C ~ 85°C
CFS-20632768HZBB Citizen 晶振 CFS-206 32.768kHz ±5ppm 6pF -20°C ~ 70°C
CFS-20632768HZCB Citizen 晶振 CFS-206 32.768kHz ±5ppm 9pF -20°C ~ 70°C
CFS-20632768HZYB Citizen 晶振 CFS-206 32.768kHz ±5ppm 7pF -20°C ~ 70°C
CM200C32768EZBT Citizen 晶振 CM200C 32.768kHz ±10ppm 6pF -40°C ~ 85°C
CFV-20675000BZFB Citizen 晶振 CFV-206 75kHz ±50ppm 12.5pF -20°C ~ 70°C
CFV-20677500BZFB Citizen 晶振 CFV-206 77.5kHz ±50ppm 12.5pF -20°C ~ 70°C
CFV-20675000AZFB Citizen 晶振 CFV-206 75kHz ±30ppm 12.5pF -20°C ~ 70°C
CFV-20638000AZFB Citizen 晶振 CFV-206 38kHz ±30ppm 12.5pF -20°C ~ 70°C
CFV-20677503AZFB Citizen 晶振 CFV-206 77.503kHz ±30ppm 12.5pF -20°C ~ 70°C
CM250C65536AZFT Citizen 晶振 CM250C 65.536kHz ±30ppm 12.5pF -40°C ~ 85°C
CM250C75000AZFT Citizen 晶振 CM250C 75kHz ±30ppm 12.5pF -40°C ~ 85°C
CM41532768AZCT Citizen 晶振 CM415 32.768kHz ±30ppm 9pF -40°C ~ 85°C
CM250C32000DZFT Citizen 晶振 CM250C 32kHz ±20ppm 12.5pF -40°C ~ 85°C
CM41532768DZBT Citizen 晶振 CM415 32.768kHz ±20ppm 6pF -40°C ~ 85°C
CFS308-32.768KDZF Citizen 晶振 CFS308 32.768kHz ±20ppm 12.5pF -10°C ~ 60°C
CFV206 60.005KAZF Citizen 晶振 CFV-206 60.005kHz ±30ppm 12.5pF -20°C ~ 70°C
CFV206 76.790KAZF Citizen 晶振 CFV-206 76.79kHz ±30ppm 12.5pF -20°C ~ 70°C
CFV206 76.810KAZF Citizen 晶振 CFV-206 76.81kHz ±30ppm 12.5pF -20°C ~ 70°C
CFV206 77.500KAZF Citizen 晶振 CFV-206 77.5kHz ±30ppm 12.5pF -20°C ~ 70°C