LMX9830SMX National Semiconductor, LMX9830SMX Datasheet - Page 22
LMX9830SMX
Manufacturer Part Number
LMX9830SMX
Description
Manufacturer
National Semiconductor
Datasheet
1.LMX9830SMX.pdf
(46 pages)
Specifications of LMX9830SMX
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External Reference Clock Frequency (Note 39)
Frequency Tolerance (over full operating temperature and aging)
Crystal Serial Resistance
External Reference Clock Power Swing, pk to pk
Aging
10.7.4 ESR (Equivalent Series Resistance)
LMX9830 can operate with a wide range of crystals with dif-
ferent ESR ratings. Reference Table 21 and Figure 9 for more
details.
Note 39: Supported frequencies from external oscillator (in MHz): 10.00, 10.368, 12.00, 12.60, 12.80, 13.00, 13.824, 14.40, 15.36, 16.00, 16.20, 16.80, 19.20,
19.68, 19.80
10.8 ANTENNA MATCHING AND FRONT-END FILTERING
Figure 10 shows the recommended component layout to be
used between RF output and antenna input. Allows for ver-
satility in the design such that the match to the antenna maybe
improved and/or the blocking margin increased by addition of
a LC filter. Refer to antenna application note for further details.
Parameter
FIGURE 9. ESR vs. Load Capacitance for the Crystal Circuit
TABLE 21. System Clock Requirements
22
Min
100
-20
10
FIGURE 10. Front End Layout
Typ
±15
200
13
Max
+20
230
400
±1
20
ppm per year
20180018
Unit
MHz
ppm
mV
20180017
Ω
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