參數(shù)資料
型號(hào): LMX1501AMX
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類(lèi): XO, clock
英文描述: PLLatinumTM 1.1 GHz Frequency Synthesizer for RF Personal Communications
中文描述: PLL FREQUENCY SYNTHESIZER, 1100 MHz, PDSO16
封裝: 0.150 INCH, PLASTIC, SOP-16
文件頁(yè)數(shù): 18/22頁(yè)
文件大?。?/td> 367K
代理商: LMX1501AMX
Application Information
(Continued)
TL/W/12340–43
FIGURE 5. PLL Reference Spurs
The reference spurious level is
k
b
66 dBc, due to the loop
filter attenuation and the low spurious noise level of the
LMX1511.
TL/W/12340–45
FIGURE 6. PLL Phase Noise 3.5 kHz Offset
The phase noise level at 3 kHz offset is
b
65 dBc/Hz.
TL/W/12340–44
FIGURE 7. PLL Phase Noise
@
150 Hz Offset
The phase noise level at 150 Hz offset is
b
75.5 dBc/Hz.
TL/W/12340–42
FIGURE 8. Frequency Jump Lock Time
Of concern in any PLL loop filter design is the time it takes
to lock in to a new frequency when switching channels.Fig-
ure 8 shows the switching waveforms for a frequency jump
of 857 MHz–915 MHz. By narrowing the frequency span of
the HP53310A Modulation Domain Analyzer enables evalu-
ation of the frequency lock time to within
g
1 kHz. The lock
time is seen to be
k
1.6 ms for a frequency jump of 58 MHz.
18
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