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參數(shù)資料
| 型號(hào)： | FS6131-01 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Programmable Line Lock Clock Generator IC |
| 中文描述： | 可編程線鎖定時(shí)鐘發(fā)生器IC |
| 文件頁數(shù)： | 6/39頁 |
| 文件大?。?/td> | 435K |
| 代理商： | FS6131-01 |
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6
FS6131-01
Programmable Line Lock Clock Generator IC
The loop phase angle is:
[
]
)
2
(
arg
i
LOOP
i
f
j
K
π
=
Θ
.
Figure 9: Loop Phase vs. Frequency
-150°
Frequency (f
i
)
-100°
P
0.1kHz
1kHz
10kHz
100kHz
A Nyquist plot of gain vs. amplitude is shown below.
Figure 10: Loop Nyquist Plot
45°
0°
315°
270°
225°
180°
135°
90°
0.2
0.4
0.6
0.8
1.0
Phase
Amplitude
1.2
Gain Margin
Phase
Margin
4.4
The VCXO provides a tunable, low-jitter frequency refer-
ence for the rest of the FS6131 system components.
Loading capacitance for the crystal is internal to the de-
vice. No external components (other than the resonator
itself) are required for operation of the VCXO.
The resonator loading capacitance is adjustable under
register control. This feature permits factory coarse tun-
ing of inexpensive resonators to the necessary precision
for digital video applications. Continuous fine-tuning of
the VCXO frequency is accomplished by varying the volt-
age on the XTUNE pin. The total change (from one ex-
treme to the other) in effective loading capacitance is
1.5pF nominal, and the effect is shown in Figure 11. The
oscillator operates the crystal resonator in the parallel-
resonant mode. Crystal warping, or the “pulling” of the
crystal oscillation frequency, is accomplished by altering
the effective load capacitance presented to the crystal by
the oscillator circuit. The actual amount that changing the
load capacitance alters the oscillator frequency will be
dependent on the characteristics of the crystal as well as
the oscillator circuit itself.
The motional capacitance of the crystal (usually referred
to by crystal manufacturers as C
1
), the static capacitance
of the crystal (C
0
), and the load capacitance (C
L
) of the
oscillator determine the warping capability of the crystal
in the oscillator circuit. A simple formula to determine the
total warping capability of a crystal is
(
(
C
0
2
×
where C
L1
and C
L2
are the two extremes of the applied
load capacitance obtained from Table 11.
Example: A crystal with the following parameters is used
with the FS6131. The total coarse tuning range is:
C
1
=
0.02pF
, C
0
=
5.0pF
, C
L
1
=
10.0pF
, C
L
2
=
22.66pF
(
(
.
66
22
5
2
×
+
×
Voltage-Controlled Crystal Oscillator
)
) (
×
)
C
C
C
C
C
+
C
ppm
f
L
L
L
L
1
0
2
6
1
2
1
10
+
)
(
×
×
=
,
)
) (
)
ppm
.
.
f
305
10
5
10
10
66
22
02
0
6
=
+
×
×
=
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| FS6131-01G | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Programmable Line Lock Clock Generator IC |
| FS6131-01G-XTD | 功能描述:時(shí)鐘發(fā)生器及支持產(chǎn)品 I2C PROG PLL CLK RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數(shù)量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-56 |
| FS6131-01G-XTP | 功能描述:時(shí)鐘發(fā)生器及支持產(chǎn)品 I2C PROG PLL CLK RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數(shù)量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-56 |
| FS6131-01I-XTD | 功能描述:時(shí)鐘發(fā)生器及支持產(chǎn)品 I2C PROG PLL CLK (IND) RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數(shù)量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-56 |
| FS6131-01I-XTP | 功能描述:時(shí)鐘發(fā)生器及支持產(chǎn)品 I2C PROG PLL CLK IND RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數(shù)量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-56 |
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