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參數(shù)資料
| 型號： | ICS813001AGILFT |
| 廠商： | IDT, Integrated Device Technology Inc |
| 文件頁數(shù)： | 2/18頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC VCXO DUAL MULTIPLER 24-TSSOP |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 系列： | HiPerClockS™, FemtoClock™ |
| 類型： | 多路復(fù)用器，壓控晶體振蕩器（VCXO） |
| PLL： | 帶旁路 |
| 輸入： | HCSL，LVCMOS，LVDS，LVHSTL，LVPECL，LVTTL，SSTL |
| 輸出： | LVPECL |
| 電路數(shù)： | 1 |
| 比率 - 輸入:輸出： | 5:1 |
| 差分 - 輸入:輸出： | 是/是 |
| 頻率 - 最大： | 640MHz |
| 除法器/乘法器： | 是/是 |
| 電源電壓： | 2.375 V ~ 3.465 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 24-TSSOP（0.173"，4.40mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 24-TSSOP |
| 包裝： | 帶卷 (TR) |
| 其它名稱： | 813001AGILFT |
813001AGI
www.icst.com/products/hiperclocks.html
REV. A OCTOBER 31, 2012
10
Integrated
Circuit
Systems, Inc.
ICS813001I
DUAL VCXO W/3.3V, 2.5V LVPECL
FEMTOCLOCK PLL
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TABLE 7.VARACTOR PARAMETERS
FORMULAS
Low
V
S
L
Low
V
S
L
Low
V
S
L
Low
V
S
L
Low
C
_
2
_
1
_
2
_
1
High
V
S
L
High
V
S
L
High
V
S
L
High
V
S
L
High
C
_
2
_
1
_
2
_
1
6
0
1
0
1
0
10
1
2
1
2
1
)
(
C
TPR
Range
Pull
Total
High
Low
C
Low
is the effective capacitance due to the low varactor capacitance, load capacitance and stray capacitance.
C
Low
determines the high frequency component on the TPR.
C
High
is the effective capacitance due to the high varactor capacitance, load capacitance and stray capacitance.
C
High
determines the low frequency component on the TPR.
Absolute Pull Range (APR) = Total Pull Range – (Frequency Tolerance + Frequency Stability + Aging)
EXAMPLE CALCULATIONS
Using the tables and figures above, we can now calculate the
TPR and APR of the VCXO using the example crystal
parameters. For the numerical example below there were
some assumptions made. First, the stray capacitance (C
S1,
C
S2), which is all the excess capacitance due to board
parasitic, is 4pF. Second, the expected lifetime of the project
is 5 years; hence the inaccuracy due to aging is ±15ppm.
Third, though many boards will not require load tuning
capacitors (C
L1, CL2), it is recommended for long-term
consistent performance of the system that two tuning
capacitor pads be placed into every design. Typical values
for the load tuning capacitors will range from 0 to 4pF.
TPR = ±106ppm
APR = 106ppm – (20ppm + 20ppm + 15ppm) = ±51ppm
The example above will ensure a total pull range of
±106 ppm with an APR of ±51ppm. Many times, board
designers may select their own crystal based on their
application. If the application requires a tighter APR, a crystal
with better pullability (C0/C1 ratio) can be used. Also, with the
equations above, one can vary the frequency tolerance,
temperature stability, and aging or shunt capacitance to
achieve the required pullability.
C
Low =
(0 + 4p + 15p ) (0 + 4p + 15p )
= 9.5p
C
High =
(0 + 4p + 27.4p ) (0 + 4p + 27.4p )
= 15.7p
1
2 220
(1 + 9.5p
4p )
2 220
(1 +15.7p
4p )
1
–
TPR =
= 106 = 212ppm
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ICS813001AGIT | 制造商:ICS 制造商全稱:ICS 功能描述:DUAL VCXO W/3.3V, 2.5V LVPECL FEMTOCLOCK-TM PLL |
| ICS813001I | 制造商:ICS 制造商全稱:ICS 功能描述:DUAL VCXO W/3.3V, 2.5V LVPECL FEMTOCLOCK-TM PLL |
| ICS813076BYI-31LF | 功能描述:IC VCXO-PLL WIRELESS 48-TQFP 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:- 標(biāo)準(zhǔn)包裝:27 系列:Precision Edge® 類型:頻率合成器 PLL:是 輸入:PECL，晶體 輸出:PECL 電路數(shù):1 比率 - 輸入:輸出:1:1 差分 - 輸入:輸出:無/是 頻率 - 最大:800MHz 除法器/乘法器:是/無 電源電壓:3.135 V ~ 5.25 V 工作溫度:0°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC 包裝:管件 |
| ICS813076BYI-31LFT | 功能描述:IC VCXO-PLL WIRELESS 48-TQFP 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:- 標(biāo)準(zhǔn)包裝:27 系列:Precision Edge® 類型:頻率合成器 PLL:是 輸入:PECL，晶體 輸出:PECL 電路數(shù):1 比率 - 輸入:輸出:1:1 差分 - 輸入:輸出:無/是 頻率 - 最大:800MHz 除法器/乘法器:是/無 電源電壓:3.135 V ~ 5.25 V 工作溫度:0°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC 包裝:管件 |
| ICS813076CYILF | 功能描述:IC VCXO-PLL WIRELESS 64-TQFP RoHS:是 類別:集成電路 (IC) >> 時鐘/計時 - 專用 系列:HiPerClockS™, FemtoClock™ 標(biāo)準(zhǔn)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 |
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