參數(shù)資料
型號: SY89537LMHTR
廠商: MICREL INC
元件分類: 時鐘產(chǎn)生/分配
英文描述: 756 MHz, OTHER CLOCK GENERATOR, QCC44
封裝: 7 X 7 MM, LEAD FREE, MO-220, MLF-44
文件頁數(shù): 5/19頁
文件大小: 819K
代理商: SY89537LMHTR
Micrel, Inc.
SY89537L
July 2005
M9999-072105
hbwhelp@micrel.com or (408) 955-1690
13
PLL Stability
For the loop filter configurations shown in Figure 3a
and 3b, Table 5a and 5b below summarizes the PLLs
loop stability in terms of damping factor, natural
frequency, and bandwidth, and illustrates the pole and
zero cutoff frequencies determined by the loop filter
Parameter
Units
VCC
3
3.3
3.6
V
Temperature
–40
-40
25
85
C
VCO Frequency
2352
2800
3024
2352
2800
3024
2352
2800
3024
MHz
Charge Pump
Current
1.80E-04
A
Loop Filter
Resistor
130
Zero Capacitor
4.70E-07
F
Pole Capacitor
1.00E-09
F
VCO Gain
(KVCO)
3.20E+09
4.50E+09
2.80E+09
3.30E+09
3.10E+09
2.30E+09
1.70E+09
1.30E+09
Hz/V
Feedback Divider
168
Integer
Phase Detector
Frequency
14
16
18
14
16
18
14
16
18
MHz
Damping Factor
2.6
3.1
2.4
2.6
2.2
1.7
1.9
Natural
Frequency
13600.29
16127.95
12721.90
13811.16
13386.09
11530.20
9912.83
8668.52
Hz
Ratio=Phase
Detector Freq/BW
197
160
180
225
219
262
274
424
624
Zero Frequency
2.61E+03
Hz
Loop Bandwidth
(BN)
7.1E+04
9.98E+04
9.98+04
6.21E+04
7.32E+04
6.88E+04
5.1E+04
3.77E+04
2.88E+04
Hz
Pole Frequency
1.22E+07
Hz
Table 5a. Optimized for Lowest Cycle-to-Cycle Jitter
(R = 130, C1 = 0.47F, C2 = 100pF)
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