LMX9830SMX National Semiconductor, LMX9830SMX Datasheet - Page 40
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LMX9830SMX
Manufacturer Part Number
LMX9830SMX
Description
Manufacturer
National Semiconductor
Datasheet
1.LMX9830SMX.pdf
(46 pages)
Specifications of LMX9830SMX
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Note 40: Capacitor values, Ct1 and Ct2 may vary depending on board design crystal manufacturer specification.
Note: (C
= crystal capacitance load rating) of 12pF or greater rating is required from the crystal vendor of choice to best match module impedance and give a
L
viable tuning range for the system.
For grounding a single ground plane is used for both RF and Digital Grounding.
For Antenna it is recommend that a 3 component L type pad with series 6.8pF blocker cap be used between RF output and antenna matching L network. This
allows for versatility in the design such that the match to the antenna maybe improved and/or the blocking margin increased by use a LC filter.
FIGURE 19. 2.5V to 3.3V Example Functional System Schematic
www.national.com
40
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