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溫度變化對石英晶體的影響CM200C32768EZFT

來源：金洛鑫瀏覽：- 發布日期：2023-06-20 16:50:20【大中小】

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如今，沒有石英晶體的節假日是不可想象的！為什么？因為即使是現代的戶外照明時間開關也需要石英來獲得準確的時間基準。此外，我們的許多禮物都是基于最先進的電子產品。手機、智能手表、個人電腦——它們都需要高精度的頻率給定元件來相互通信。如果沒有這種交流，它們的用處就會受到嚴重限制，甚至不存在。這些設備通常從石英接收必要的驅動節奏，石英是這種設備的現代“心臟”。

振蕩晶體會隨著溫度的變化而改變其行為和電氣特性。因此，溫度變化會導致頻率偏差。這種偏差以“百萬分之幾(ppm)來衡量，這意味著:1ppm =百萬分之一= 0.000001 = 0.0001%。AT切割晶體的溫度敏感性

MHz范圍內的振蕩晶體也稱為AT切割晶體。它們包含薄石英晶片，即所謂的石英坯。at切割石英坯是以35°的AT角從石英塊上切割下來的。坯件的厚度基本上決定了室溫下的基頻。然而，石英坯從石英塊上切割下來的準確角度是造成其他溫度下頻率偏差的原因。如果在切割過程中非常精確地達到35° 15′的理想角度，石英對溫度的敏感度就會降低。

如下圖，您可以看到不同的切割角度選項

溫度靈敏度是三次拋物線的函數。在切割過程中，即使是單角秒范圍內的最小誤差也會導致曲線圍繞拐點旋轉。這惡化了后續應用所需溫度范圍內的溫度靈敏度。在坯件的制造過程中，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圍內實現。因此，制造的毛坯必須根據它們的偏差進行分類，并根據它們的精度用于合適的晶體。

圖1:由交角偏差產生的頻率偏差對溫度的曲線

音叉晶體的溫度依賴性

對于音叉石英晶體(也稱為時鐘晶體)，倒拋物線的函數描述了頻率的溫度依賴性。在這種情況下，溫度相關頻率偏差為0 ppm時的拋物線頂點在25°c，在較低和較高的溫度下，例如在該點的左側和右側，頻率逐漸下降，并且符合二次曲線。如果電路中的石英調整正確，將會有一個與溫度相關的滯后，例如實時時鐘。應用程序的開發人員一定要考慮到這一點。

圖2:拋物線描述了音叉晶體頻率的溫度依賴性

這對應用程序意味著什么？

兩條溫度曲線都表明極端溫度對石英晶體的頻率有影響。對于大多數應用而言，與溫度相關的微小頻率變化(例如-40°C至+85°C范圍內的+/-15 ppm)不成問題。然而，如果需要更精確的頻率，建議使用溫度補償晶體振蕩器，稱為TCXO晶振。這提供了非常高的頻率精度，即使在很寬的溫度范圍內也能達到幾個ppm。

如有任何需求可以隨時聯系我們，我們很樂意為您的應用選擇合適的時鐘發生器提供建議。

原廠編碼	生產廠家	型號	頻率	頻率偏差	負載電容	工作溫度
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

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溫度變化對石英晶體的影響CM200C32768EZFT

音叉晶體的溫度依賴性

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