LMX1600SLB National Semiconductor, LMX1600SLB Datasheet - Page 13

• Manufacturer Part Number: LMX1600SLB
• Description: PLLatinum Low Cost Dual Frequency Synthesizer
• Manufacturer: National Semiconductor

2.0 Programming Description
2.7 TYPICAL APPLICATION EXAMPLE
OPERATIONAL NOTES:
*
**
***
**** Adding RC filter to the V
—
—
VCO is assumed AC coupled.
R
200
higher.
50 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
cause the input circuit provides its own bias. (See Figure below)
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 a static sensitive device. It should be handled only at static free work stations.
IN
increases impedance so that VCO output power is provided to the load rather than the PLL. Typical values are 10
depending on the VCO power level. The fin RF impedance ranges from 40
CC
line is recommended to reduce loop-to-loop noise coupling.
(Continued)
13
IN
may be AC or DC coupled. AC coupling is recommended be-
DS100129-21
to 100 . The fin IF impedances are
DS100129-20
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to