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参数资料
| 型号： | TRU050-TACHA16.000-8.000 |
| 厂商： | VECTRON INTERNATIONAL |
| 元件分类： | PLL合成/DDS/VCOs |
| 英文描述： | PHASE LOCKED LOOP, CDIP16 |
| 封装： | HERMETIC SEALED, CERAMIC, DIP-16 |
| 文件页数： | 15/17页 |
| 文件大小： | 627K |
| 代理商： | TRU050-TACHA16.000-8.000 |
VCXO
The TRU-050's VCXO is a varactor-tuned crystal oscillator which produces an output frequency controlled by a control
voltage, Vc. The tracking range of the VCXO is specified as absolute pull range (APR) when ordered. An APR of ±50
ppm guarantees that the TRU-050 can track an input source frequency with ±50 ppm stability over all operating
conditions, including temperature, time, power supply and load variations. The value of Vc is varied between 0.5 V
to 4.5 V to achieve the specified APR. A typical frequency versus Vc curve for the VCXO in the TRU-050 is shown in
figure 11. When designing PLLs, the VCXO gain (kV in Hz/V or rad/Vs) is an important parameter. As a rule of
thumb, the frequency deviation for the TRU-050 VCXO is 300 ppm over the 1 V to 4 V range Vc.
For example, a 10 MHz VCXO has an average gain of 1000 Hz/V. The peak value of kV is about twice this value
at approximately 2.5 V, and one half this value at 1 V and 4 V.
For many loop calculations, the gain is expressed in rad/Vs which would be 2
π (100 ppm * f0/Vs) for the
previous example.
Vectron International 166 Glover Avenue, Norwalk, CT 06856-5160 Tel: 1-88-VECTRON-1 e-mail: vectron@vectron.com
200
150
100
50
0
-50
-100
-150
-200
0
1
2
3
4
5
CONTROL VOLTAGE (Vc)
TRU-050 VCXO Frequency Deviation vs. Control Voltage
Figure 11.
V
= 5.00 V, 25 C
8.192 MHz
DD
7 of 17
How is quality
assured?
In addition to
extensive testing,
the basic design
consists of a few
highly engineered,
robust components;
quality is further
assured by advanced
ceramic packaging
and fully automated
assembly.
Oscillator Aging
Any crystal stabilized oscillator typically exhibits a small shift in output frequency during aging. The major factors which lead to this shift are changes in the mechanical
stress on the crystal and mass-loading of foreign material on the crystal.
As the oscillator ages, relaxation of the crystal mounting stress or transfer of environmental stress through the package to the crystal mounting arrangement can lead to
frequency variations. Vectron has minimized these two effects through the use of a miniature AT-cut strip resonator crystal which allows a superior mounting arrangement
and results in minimal relaxation and almost negligible environmental stress transfer.
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PDF描述 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TRU050-TACHA-1M0000000 | 制造商:VECTRON 制造商全称:Vectron International, Inc 功能描述:Complete VCXO based Phase-Locked Loop |
| TRU050-TACHA-32.7680MHZ | 制造商:Misc 功能描述: |
| TRU050-TACHA-65M0000000 | 制造商:VECTRON 制造商全称:Vectron International, Inc 功能描述:Complete VCXO based Phase-Locked Loop |
| TRU050-TACHB-1M0000000 | 制造商:VECTRON 制造商全称:Vectron International, Inc 功能描述:Complete VCXO based Phase-Locked Loop |
| TRU050-TACHB-65M0000000 | 制造商:VECTRON 制造商全称:Vectron International, Inc 功能描述:Complete VCXO based Phase-Locked Loop |
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