4 Current Loop Filter Configuration

Note that if the phase detector frequency is changed significantly, the loop filter needs to be redesigned.

Table 4-1 Current Loop Filter Configuration

PARAMETER	VALUE
VCO Gain	132 MHz/V
Loop Bandwidth	285 kHz
Phase Margin	65 deg
C1_LF	390 pF
C2_LF	68 nF
C3_LF	Open
C4_LF	1800 pF
R2	68 Ω
R3_LF	0 Ω
R4_LF	18 Ω
Effective Charge Pump Gain	15 mA
Phase Detector Frequency (MHz)	200 MHz
VCO Frequency	Designed for 15 GHz, but works over the whole frequency range

Figure 4-1 Current Loop Filter Configuration

For detailed design and simulation, see the PLLatinum Sim Tool.

For application notes, videos, and other technical information on TI products, see http://www.ti.com/pll.