IDT / ICS VCXO-TO-LVCMOS OUTPUTS 9" />
參數(shù)資料
型號: FMS6145MTC14
廠商: Fairchild Semiconductor
文件頁數(shù): 11/11頁
文件大?。?/td> 0K
描述: IC DRIVER VIDEO FLTR 5CH 14TSSOP
標準包裝: 94
類型: 驅動器
應用: 錄音機,機頂盒
安裝類型: 表面貼裝
封裝/外殼: 14-TSSOP(0.173",4.40mm 寬)
供應商設備封裝: 14-TSSOP
包裝: 管件
其它名稱: FMS6145MTC14_NL
FMS6145MTC14_NL-ND
IDT / ICS VCXO-TO-LVCMOS OUTPUTS
9
ICS81006AKI REV. B OCTOBER 8, 2008
ICS81006I
VCXO-TO-6 LVCMOS OUTPUTS
APPLICATION INFORMATION
Oscillator
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
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y
Sr
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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 range and
V
C
Control voltage used to tune frequency
C
V
Varactor capacitance, varies due to the change in
control voltage
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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