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參數(shù)資料
| 型號： | ICS810001DK-21LF |
| 廠商： | IDT, Integrated Device Technology Inc |
| 文件頁數(shù)： | 6/19頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC CLK GEN SYNC VCXO DL 32VFQFN |
| 標準包裝： | 490 |
| 系列： | HiPerClockS™, FemtoClock™ |
| 類型： | 時鐘/頻率發(fā)生器，轉(zhuǎn)換器，抖動衰減器，多路復(fù)用器 |
| PLL： | 是 |
| 主要目的： | 視頻 |
| 輸入： | LVCMOS，LVTTL |
| 輸出： | LVCMOS，LVTTL |
| 電路數(shù)： | 1 |
| 比率 - 輸入:輸出： | 2:1 |
| 差分 - 輸入:輸出： | 無/無 |
| 頻率 - 最大： | 175MHz |
| 電源電壓： | 3.135 V ~ 3.465 V |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 32-VFQFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 32-VFQFPN 裸露焊盤（4x4） |
| 包裝： | 托盤 |
| 其它名稱： | 800-2276 ICS810001DK-21LF-ND |
ICS810001DK-21 REVISION B APRIL 13, 2010
14
2010 Integrated Device Technology, Inc.
ICS810001-21 Data Sheet
FEMTOCLOCK DUAL VCXO VIDEO PLL
VCXO-PLL EXTERNAL COMPONENTS
Choosing the correct external components and having a proper
printed circuit board (PCB) layout is a key task for quality operation of
the VCXO-PLL. In choosing a crystal, special precaution must be
taken with the package and load capacitance (CL). In addition,
frequency, accuracy and temperature range must also be
considered. Since the pulling range of a crystal also varies with the
package, it is recommended that a metal-canned package like HC49
be used. Generally, a metal-canned package has a larger pulling
range than a surface mounted device (SMD). For crystal selection
information, refer to the VCXO Crystal Selection Application Note.
The crystal’s load capacitance CL characteristic determines its
resonating frequency and is closely related to the VCXO tuning
range. The total external capacitance seen by the crystal when
installed on a board is the sum of the stray board capacitance, IC
package lead capacitance, internal varactor capacitance and any
installed tuning capacitors (CTUNE).
If the crystal CL is greater than the total external capacitance, the
VCXO will oscillate at a higher frequency than the crystal
specification. If the crystal CL is lower than the total external
capacitance, the VCXO will oscillate at a lower frequency than the
crystal specification. In either case, the absolute tuning range is
reduced. The correct value of CL is dependant on the characteristics
of the VCXO. The recommended CL in the Crystal Parameter Table
balances the tuning range by centering the tuning curve.
The frequency of oscillation in the
third overtone mode is not
necessarily at exactly three times
the fundamental frequency. The
mechanical properties of the
quartz element dictate the
position of the overtones relative
to the fundamental. The oscillator
circuit may excite both the
fundamental and overtone modes
simultaneously. This will cause a
nonlinearity in the tuning curve.
This potential problem is why
VCXO crystals are required to be
tested for absence of any activity inside a ±200ppm window at three
times the fundamental frequency. Refer to FL_3OVT and FL_3OVT_spurs
in the crystal Characteristics table.
The crystal and external loop filter components should be kept as
close as possible to the device. Loop filter and crystal traces should
be kept short and separated from each other. Other signal traces
should be kept separate and not run underneath the device, loop
filter or crystal components.
VCXO Characteristics Table
VCXO-PLL Loop Bandwidth Selection Table
LF0
LF1
ISET
XTAL_IN
XTAL_OUT
RS
C
S
C
P
R
SET
C
TUNE
C
TUNE
19.44MHz
Symbol
Parameter
Typical
Units
kVCXO
VCXO Gain
6.6
kHz/V
CV_LOW
Low Varactor Capacitance
15
pF
CV_HIGH
High Varactor Capacitance
29
pF
Bandwidth
Crystal Frequency (MHz)
M
RS (k)CS (F)
CP (F)
RSET (k)
6Hz (Low)
27
4004
175
4.7
0.01
8.0
80Hz (Mid)
27
1000
150
0.22
0.001
2.21
475Hz (High)
27
92
125
0.1
0.0001
3.3
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| ICS810001DK-21LFT | 功能描述:IC CLK GEN SYNC VCXO DL 32VFQFN RoHS:是 類別:集成電路 (IC) >> 時鐘/計時 - 專用 系列:HiPerClockS™, FemtoClock™ 標準包裝:1,500 系列:- 類型:時鐘緩沖器/驅(qū)動器 PLL:是 主要目的:- 輸入:- 輸出:- 電路數(shù):- 比率 - 輸入:輸出:- 差分 - 輸入:輸出:- 頻率 - 最大:- 電源電壓:3.3V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SSOP（0.209"，5.30mm 寬） 供應(yīng)商設(shè)備封裝:28-SSOP 包裝:帶卷 (TR) 其它名稱:93786AFT |
| ICS810-06 | 制造商:ICS 制造商全稱:ICS 功能描述:VCXO-TO-6 LVCMOS OUTPUTS |
| ICS81006AK | 制造商:ICS 制造商全稱:ICS 功能描述:VCXO-TO-6 LVCMOS OUTPUTS |
| ICS81006AKI | 制造商:ICS 制造商全稱:ICS 功能描述:VCXO-TO-6 LVCMOS OUTPUTS |
| ICS81006AKILF | 功能描述:IC VCXO TO 6 LVCMOS OUT 20VFQFPN RoHS:是 類別:集成電路 (IC) >> 時鐘/計時 - 時鐘發(fā)生器，PLL，頻率合成器 系列:HiPerClockS™ 標準包裝:1,000 系列:- 類型:時鐘/頻率合成器，扇出分配 PLL:- 輸入:- 輸出:- 電路數(shù):- 比率 - 輸入:輸出:- 差分 - 輸入:輸出:- 頻率 - 最大:- 除法器/乘法器:- 電源電壓:- 工作溫度:- 安裝類型:表面貼裝 封裝/外殼:56-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:56-VFQFP-EP（8x8） 包裝:帶卷 (TR) 其它名稱:844S012AKI-01LFT |
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