MC12179

8

MOTOROLA RF/IF DEVICE DATA

1k

10k

100k

1M

10M

40M

–170

–150

–100

–50

0

–125

–75

–25

L(f) [dBc/Hz] vs f[Hz]

HP 3048A

CARRIER

2200MHz

Figure 13. VCO Output Spectrum with MC12179, VCC = 5.0 V

(ECLiPTEK 8.9 MHz Crystal and ZCOM 2500 VCO)

Figure 14. Typical Phase Noise Plot, 2200 MHz VCO

(With the MC12179 in a Closed Loop)

NOTE: Spurs can be reduced further by narrowing the loop bandwidth of the PLL loop filter and/or

adding an extra filter (Rx/Cx)

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com