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CXH49SFA10000H0QSWZZ PDF预览

CXH49SFA10000H0QSWZZ

更新时间： 2024-01-21 16:37:21
品牌 Logo 应用领域
京瓷/艾维克斯 - KYOCERA AVX 晶体
页数 文件大小 规格书
27页 1671K
描述
Crystal Units Surface Mount Type

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CXH49SFA10000H0QSWZZ 技术参数

是否Rohs认证： 符合生命周期：Obsolete
包装说明：ROHS COMPLIANT, RESISTANCE WELD, HERMATIC SEALED, METAL PACKAGE-2Reach Compliance Code：unknown
HTS代码：8541.60.00.50风险等级：5.84
晶体/谐振器类型：PARALLEL - FUNDAMENTAL驱动电平：10 µW
频率稳定性：0.02%频率容差：100 ppm
负载电容：12 pF安装特点：THROUGH HOLE MOUNT
标称工作频率：10 MHz最高工作温度：125 °C
最低工作温度：-40 °C物理尺寸：L11.0XB5.0XH3.5 (mm)/L0.433XB0.197XH0.138 (inch)
串联电阻：90 Ω表面贴装：NO

CXH49SFA10000H0QSWZZ 数据手册

 浏览型号CXH49SFA10000H0QSWZZ的Datasheet PDF文件第19页浏览型号CXH49SFA10000H0QSWZZ的Datasheet PDF文件第20页浏览型号CXH49SFA10000H0QSWZZ的Datasheet PDF文件第21页浏览型号CXH49SFA10000H0QSWZZ的Datasheet PDF文件第23页浏览型号CXH49SFA10000H0QSWZZ的Datasheet PDF文件第24页浏览型号CXH49SFA10000H0QSWZZ的Datasheet PDF文件第25页 
Handling Notes  
800  
700  
600  
500  
400  
300  
200  
100  
0
(2) Changes of load capacitance and oscillation frequency  
As shown above, the series resonance frequency of the crystal  
unit changes with load capacitance CL of the oscillation circuit.  
In the actual oscillation circuit, however, fine adjustments of  
oscillation frequencies are carried out by varying CL by the  
trimmer capacitor or the like. The following figure shows an  
example of load capacitance characteristics. The slope of the  
characteristics varies depending on the frequency, shape, the  
number of overtone mode, etc.  
Load capacity characteristic  
0
10  
20  
30  
40  
50  
60  
L (pF)  
C
3. Crystal oscillation circuit  
CMOS fundamental crystal oscillation circuit  
(1) CMOS fundamental crystal oscillation circuit  
As shown above, the series resonance frequency of the crystal  
The figure on the right shows a standard CMOS inverter crystal  
oscillation circuit for oscillating crystal unit with fundamental mode.  
* Rx is an element to reduce excitation current of the crystal unit  
preventing frequency fluctuation, but Rx is not used in some cases.  
Rf=1M  
Buffer  
Xtal  
Rd  
Rx  
C
1
C
2
Characteristics of the circuit when load capacitances C  
1
and C  
2
Variation of negative resistance with condenser capacity  
are changed under the condition of C  
1
= C  
2
are shown in the  
Condenser capasityC (C1=C2)(pF)  
figure on the right.  
0
10  
20  
30  
40  
50  
It is not desirable that the excessive increase of the value of  
condenser leads to a decrease of the negative resistance  
resulting in increasing the possibility of oscillation failure.  
-100  
-200  
-500  
16.0MHz  
10.0MHz  
-1K  
-2K  
3.579545MHz  
()  
-5K  
-10K  
Frequency characteristics of negative resistance  
Rd mainly adjusts frequency characteristics of the negative  
resistance and is used to prevent oscillating by third Overtone  
mode. In case of a bigger circuit of the negative resistance,  
there is a case it is used to prevent the abnormal oscillation.  
Frequency(MHz)  
2
4
6
8
10  
12  
14  
16  
-100  
-200  
-500  
C1=C2=10pF  
-1K  
-2K  
()  
Resistance of Rd  
-5K  
3.5 to 6.9MHz=2.2k  
-10K  
7.0 to 16MHz=220  
- 55 -  
1...19202122232425...27

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