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LTC1348CG

LTC1348CG资料
LTC1348CG
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File Size : 116 KB
Manufacturer:LTC
Description:The VCXO provides a tunable, low-jitter frequency refer- ence for the rest of the FS6011 system components. Loading capacitance for the crystal is internal to the FS6011. No external components (other than the reso- nator itself) are required for operation of the VCXO. The resonator loading capacitance is adjustable under register control. This permits factory coarse tuning of in- expensive resonators to the necessary precision for digi- tal video applications. Refer to Section 4.6. Continuous fine-tuning of the VCXO frequency is accom- plished by varying the voltage on the XTUNE pin. The total change (from one extreme to the other) in effective loading capacitance is 1.5pF nominal. The oscillator operates the crystal resonator in the paral- lel-resonant mode. Crystal warping, or the pulling of the crystal oscillation frequency, is accomplished by altering the effective load capacitance presented to the crystal by the oscillator circuit. The actual amount that changing the load capacitance alters the oscillator frequency will be dependent on the characteristics of the crystal as well as the oscillator circuit itself. Specifically, the motional capacitance of the crystal (usu- ally referred to by crystal manufacturers as C1), the static capacitance of the crystal (C0), and the load capacitance (CL) of the oscillator determine the warping capability of the crystal in the oscillator circuit. A simple formula to obtain the warping capability of a crystal oscillator is:
 
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  1PCS 100PCS 1K 10K  
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型 号:LTC1348CG
厂 家:LTC
封 装:SOP
批 号:08+
数 量:1151
说 明:100%真实库存,原装,部分现货
 
 
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所在地:深圳
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