參數(shù)資料
型號： MK2069-04GITR
廠商： INTEGRATED DEVICE TECHNOLOGY INC
元件分類： 時(shí)鐘產(chǎn)生/分配
英文描述： 160 MHz, OTHER CLOCK GENERATOR, PDSO56
封裝： 6.10 MM, 0.50 MM PITCH, TSSOP-56
文件頁數(shù)： 20/21頁
文件大小： 410K
代理商： MK2069-04GITR
MK2069-04
VCXO-BASED UNIVERSAL CLOCK TRANSLATOR
VCXO AND SYNTHESIZER
IDT VCXO-BASED UNIVERSAL CLOCK TRANSLATOR
8
MK2069-04
REV J 051310
Graph of Charge Pump Current vs. Value of RSET (external resistor)
Charge Pump Current, Example Settings from
Above Graph
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 IDT, increasing charge pump current (ICP) increases
both bandwidth and damping factor.
VCXO Gain (KO) vs. XTAL Frequency
10E-6
100E-6
1E-3
100E+3
1E+6
10E+6
RSET, ohms
I CP
,A
m
ps
Recommended Range
of Operation
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
15
25
3 0
2000
3000
4000
5000
6000
1000
C rys ta l Freq uency, M H z
VC
XO
G
a
in
(
K
O
),
H
z
p
e
r
V
o
lt
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PDF描述
MK2069-04GI 160 MHz, OTHER CLOCK GENERATOR, PDSO56
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