参数资料
型号: MK2069-02GI
元件分类: 时钟产生/分配
英文描述: 160 MHz, OTHER CLOCK GENERATOR, PDSO56
封装: 6.10 MM, 0.50 MM PITCH, TSSOP-56
文件页数: 19/20页
文件大小: 347K
代理商: MK2069-02GI
VCXO-Based Clock Jitter Attenuator and Translator
MDS 2069-02 G
8
Revision 050203
Integrated Circuit Systems, Inc. l 525 Race Street, San Jose, CA 95126 l tel (408) 295-9800 l
MK2069-02
Charge Pump Current, Example Settings
from Above Graph
Notes on Setting Charge Pump Current
The recommended range for the charge pump current
is 25
A to 300 A. Below 25 A, loop filter charge
leakage, due to PCB or capacitor leakage, can become
a problem. This loop filter leakage can cause locking
problems, output clock cycle slips, or low frequency
phase noise.
As can be seen in the loop bandwidth and damping
factor equations or by using the filter response software
available from ICS, increasing charge pump current
(ICP) increases both bandwidth and damping factor.
VCXO Gain (KO) vs. XTAL Frequency
Loop Filter Capacitor Type
Loop filters must use specific types of capacitors.
Recommendations for these capacitors can be found at
RSET
Charge Pump Current
(ICP)
5 M
25
A
3 M
42
A
2 M
65
A
1 M
125
A
480 k
255
A
400 k
300
A
10
20
1 5
25
30
2000
3000
4000
5000
6000
1000
C rystal F requ e ncy, M H z
VC
XO
G
a
in
(
K
O
),
H
z
p
e
r
V
o
lt
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