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| 型號(hào)： | ICS81006AKILF |
| 英文描述： | VCXO-TO-6 LVCMOS OUTPUTS |
| 中文描述： | 壓控到6 LVCMOS輸出 |
| 文件頁數(shù)： | 9/13頁 |
| 文件大?。?/td> | 146K |
| 代理商： | ICS81006AKILF |
81006AKI
www.icst.com/products/hiperclocks.html
REV. A JANUARY 19, 2006
9
Integrated
Circuit
Systems, Inc.
ICS81006I
VCXO-
TO
-6 LVCMOS O
UTPUTS
l
b
m
y
S
C
C
r
e
m
a
V
a
V
a
r
w
a
o
g
P
L
H
s
n
o
n
V
0
=
3
=
o
C
V
C
V
C
t
e
T
m
u
m
i
M
l
c
y
T
4
1
6
2
m
u
m
i
a
M
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F
p
F
p
W
O
L
_
V
e
e
c
c
n
n
a
a
a
a
p
p
a
a
C
C
r
r
H
G
I
H
_
V
h
V
T
ABLE
6. V
ARACTOR
P
ARAMETERS
F
ORMULAS
(
C
) (
) (
+
)
(
)
Low
V
S
L
Low
V
S
L
Low
V
S
L
Low
V
S
L
Low
C
C
C
C
C
C
C
C
C
C
C
C
_
2
2
_
1
1
_
2
2
_
1
1
+
+
+
+
+
+
+
+
=
(
C
) (
) (
+
)
(
)
High
V
S
L
High
V
S
L
High
V
S
L
High
V
S
L
High
C
C
C
C
C
C
C
C
C
C
C
C
_
2
2
_
1
1
_
2
2
_
1
1
+
+
+
+
+
+
+
+
=
6
0
1
0
0
1
0
10
1
2
1
1
2
1
)
(
+
+
=
C
C
C
C
C
C
C
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)
E
XAMPLE
C
ALCULATIONS
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
, C
), which
is all the excess capacitance due to board parasitic, is 4pF.
Second, the expected lifetime of the project is 5 years; hence
(
(
pf
pf
4
15
4
0
+
+
+
the inaccuracy due to aging is ±15ppm. Third, though many
boards will not require load tuning capacitors (C
, C
), 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.
(
(
pf
pf
0
6
29
4
0
+
+
+
) (
) (
)
)
pf
pf
pf
pf
pf
pf
pf
C
Low
7
4
15
4
0
4
15
+
4
0
4
15
4
0
=
+
+
+
+
+
=
) (
) (
)
)
pf
pf
pf
pf
pf
pf
pf
C
High
8
16
6
29
4
6
29
4
0
6
29
4
0
=
+
+
+
+
+
+
=
ppm
pF
pF
pF
pF
TPR
5
226
10
4
8
16
1
220
2
1
4
7
1
220
2
1
6
=
+
+
=
TPR = ±113.25ppm
APR = 113.25ppm – (20ppm + 20ppm + 15ppm) = ±58.25ppm
The example above will ensure a total pull range of
±113.25 ppm with an APR of ±58.25ppm. 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.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ICS81006AKILFT | VCXO-TO-6 LVCMOS OUTPUTS |
| ICS81006AKIT | VCXO-TO-6 LVCMOS OUTPUTS |
| ICS810-06 | VCXO-TO-6 LVCMOS OUTPUTS |
| ICS81006AK | VCXO-TO-6 LVCMOS OUTPUTS |
| ICS81006AKLF | VCXO-TO-6 LVCMOS OUTPUTS |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ICS81006AKILFT | 功能描述:IC VCXO TO 6 LVCMOS OUT 20VFQFPN RoHS:是 類別:集成電路 (IC) >> 時(shí)鐘/計(jì)時(shí) - 時(shí)鐘發(fā)生器，PLL，頻率合成器 系列:HiPerClockS™ 標(biāo)準(zhǔn)包裝:1,000 系列:- 類型:時(shí)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 |
| ICS81006AKIT | 制造商:ICS 制造商全稱:ICS 功能描述:VCXO-TO-6 LVCMOS OUTPUTS |
| ICS81006AKLF | 功能描述:IC VCXO LOW PHASE NOISE 20-VFQFN RoHS:是 類別:集成電路 (IC) >> 時(shí)鐘/計(jì)時(shí) - 時(shí)鐘發(fā)生器，PLL，頻率合成器 系列:HiPerClockS™ 標(biāo)準(zhǔn)包裝:2,000 系列:- 類型:PLL 頻率合成器 PLL:是 輸入:晶體 輸出:時(shí)鐘 電路數(shù):1 比率 - 輸入:輸出:1:1 差分 - 輸入:輸出:無/無 頻率 - 最大:1GHz 除法器/乘法器:是/無 電源電壓:4.5 V ~ 5.5 V 工作溫度:-20°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-LSSOP（0.175"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:16-SSOP 包裝:帶卷 (TR) 其它名稱:NJW1504V-TE1-NDNJW1504V-TE1TR |
| ICS81006AKLFT | 功能描述:IC VCXO TO 6 LVCMOS OUT 20VFQFPN RoHS:是 類別:集成電路 (IC) >> 時(shí)鐘/計(jì)時(shí) - 時(shí)鐘發(fā)生器，PLL，頻率合成器 系列:HiPerClockS™ 標(biāo)準(zhǔn)包裝:1,000 系列:- 類型:時(shí)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 |
| ICS81006AKT | 制造商:ICS 制造商全稱:ICS 功能描述:VCXO-TO-6 LVCMOS OUTPUTS |
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