LMX2335L National Semiconductor Corporation, LMX2335L Datasheet - Page 17

• Manufacturer Part Number: LMX2335L
• Description: Pllatinum? Low Power Dual Frequency Synthesizer For Rf Personal Communications
• Manufacturer: National Semiconductor Corporation

Typical Application Example
Operational Notes:
*
**
***
**** R2 configured F
***** Adding RC filters to the V
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.
VCO is assumed AC coupled.
R
200Ω depending on the VCO power level. f
50Ω 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 resistor is required. OSC
because the input circuit provides its own bias. (See Figure below).
IN
increases impedance so that VCO output power is provided to the load rather than the PLL. Typical values are 10Ω to
o
LD for use in FastLock mode.
CC
lines is recommended to reduce loop-to-loop noise coupling.
IN
RF impedance ranges from 40Ω to 100Ω. f
17
in
may be AC or DC coupled. AC coupling is recommended
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IN
IF impedances are higher.
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