參數(shù)資料
型號: ICS81006AKIT
廠商: SPECTRUM CONTROL INC
元件分類: 時(shí)鐘產(chǎn)生/分配
英文描述: 40 MHz, OTHER CLOCK GENERATOR, QCC20
封裝: 4 X 4 MM, 0.95 MM HEIGHT, MO-220, VFQFN-20
文件頁數(shù): 12/13頁
文件大小: 144K
代理商: ICS81006AKIT
81006AKI
www.icst.com/products/hiperclocks.html
REV. A JANUARY 19, 2006
8
Integrated
Circuit
Systems, Inc.
ICS81006I
VCXO-TO-6 LVCMOS OUTPUTS
Oscillator
APPLICATION INFORMATION
FIGURE 1: VCXO OSCILLATOR CIRCUIT
V
C
V
C
S1
C
L1
C
S2
C
L2
C
V
XTAL
VCXO (Internal)
Optional
Control Voltage
TABLE 5. EXAMPLE CRYSTAL PARAMETERS
l
o
b
m
y
Sr
e
t
e
m
a
r
a
Ps
n
o
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t
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o
C
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e
Tm
u
m
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Ml
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y
Tm
u
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i
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a
Ms
t
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.
9
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M
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T
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c
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a
r
e
l
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T
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q
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r
F
0
2
±m(xù)
p
f
S
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t
il
i
b
a
t
S
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c
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F
0
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±m(xù)
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°
5
2
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±m(xù)
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F
VCXO CRYSTAL SELECTION
Choosing a crystal with the correct characteristics is one of
the most critical steps in using a Voltage Controlled Crystal
Oscillator (VCXO). The crystal parameters affect the tuning
V
C
Control voltage used to tune frequency
C
V
Varactor capacitance, varies due to the change in
control voltage
range and accuracy of a VCXO. Below are the key variables
and an example of using the crystal parameters to calculate
the tuning range of the VCXO.
C
L1, CL2
Load tuning capacitance used for fine tuning or
centering nominal frequency
C
S1, CS2
Stray Capacitance caused by pads, vias, and other
board parasitics
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PDF描述
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