參數(shù)資料
型號: MK2069-02GI
廠商: INTEGRATED DEVICE TECHNOLOGY INC
元件分類: 時鐘產(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?。?/td> 210K
代理商: MK2069-02GI
MK2069-02
VCXO-BASED CLOCK JITTER ATTENUATOR AND TRANSLATOR
VCXO AND SYNTHESIZER
IDT VCXO-BASED CLOCK JITTER ATTENUATOR AND TRANSLATOR
8
MK2069-02
REV G 050203
Charge Pump Current, Example Settings from
Above Graph
Notes on Setting Charge Pump Current
The recommended range for the charge pump current is 25
μA to 300 μA. Below 25 μA, 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
Loop Filter Capacitor Type
Loop filters must use specific types of capacitors.
Recommendations for these capacitors can be found at
www.idt.com/?app=calculators&source=support_menu.
RSET
Charge Pump Current
(ICP)
5 M
Ω
25
μA
3 M
Ω
42
μA
2 M
Ω
65
μA
1 M
Ω
125
μA
480 k
Ω
255
μA
400 k
Ω
300
μA
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
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lt
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