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TDA5210 参数 Datasheet PDF下载

TDA5210图片预览
型号: TDA5210
PDF下载: 下载PDF文件 查看货源
内容描述: ASK / FSK单一转换接收器 [ASK/FSK Single Conversion Receiver]
分类和应用: 电信集成电路电信电路光电二极管
文件页数/大小: 53 页 / 1443 K
品牌: INFINEON [ Infineon ]
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TDA 5210  
Applications  
4.3 Quartz Load Capacitance Calculation  
The value of the capacitor necessary to achieve that the quartz oscillator is  
operating at the intended frequency is determined by the reactive part of the  
negative resistance of the oscillator circuit as shown in Section 5.1.3 and by the  
quartz specifications given by the quartz manufacturer.  
CS  
Pin 28  
Input  
impedance  
Crystal  
Z1-28  
TDA5210  
Pin 1  
Quartz_load.wmf  
Figure 4-4  
Determination of Series Capacitance Value for the Quartz Oscillator  
Crystal specified with load capacitance  
1
CS =  
1
+ 2π f X L  
Cl  
with Cl the load capacitance (refer to the quartz crystal specification).  
Examples:  
6.7 MHz: CL = 12 pFXL=695CS = 8.9 pF  
13.4 MHz: CL = 12 pFXL=1010 CS = 5.9 pF  
These values may be obtained in high accuracy by putting two capacitors in  
series to the quartz, such as 22pF and 15pF in the 6.7MHz case and 22pF and  
8.2pF in the 13.4MHz case.  
Wireless Components  
4 - 5  
Specification, May 2001  
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