參數(shù)資料
型號(hào): LMX2305TMX
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類: XO, clock
英文描述: PLLatinumTM 550 MHz Frequency Synthesizer for RF Personal Communications
中文描述: PLL FREQUENCY SYNTHESIZER, 550 MHz, PDSO20
封裝: 0.173 INCH, PLASTIC, TSSOP-20
文件頁(yè)數(shù): 10/14頁(yè)
文件大?。?/td> 228K
代理商: LMX2305TMX
Typical Application Example
Operational Notes:
*
VCO is assumed AC coupled.
**
R
IN
increases impedance so that VCO output power is provided to the load rather than the PLL. Typical values are 10
X
to 200
X
depending on the VCO power
level. f
IN
RF impedance ranges from 40
X
to 100
X
.
***
50
X
termination is often used on test boards to allow use of external reference oscillator. For most typical products a CMOS clock is used and no terminating
TL/W/12459–22
resistor is required. OSC
IN
may be AC or DC coupled. AC coupling is recommended because the input circuit provides its own bias. (See Figure below)
TL/W/12459–23
Application Hints:
Proper use of grounds and bypass capacitors is essential to achieve a high level of performance.
Crosstalk between pins can be reduced by careful board layout.
This is an electrostatic sensitive device. It should be handled only at static free work stations.
http://www.national.com
10
相關(guān)PDF資料
PDF描述
LMX2305 PLLatinum 550 MHz Frequency Synthesizer for RF Personal Communications(PLLatinum技術(shù)用于射頻個(gè)人通訊的550MHZ頻率合成器)
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