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參數(shù)資料
| 型號： | EX-380-DAD-ST3F-20MHZ |
| 廠商： | VECTRON INTERNATIONAL |
| 元件分類： | OCXO, clock |
| 英文描述： | OCXO, CLOCK, 20 MHz, HCMOS OUTPUT |
| 文件頁數(shù)： | 1/7頁 |
| 文件大?。?/td> | 770K |
| 代理商： | EX-380-DAD-ST3F-20MHZ |
O C X O s ( O v en C ontr o l l ed C r ys tal
Oscillators) are used when frequency vs.
temperature requirements are too stringent to
be met by a basic XO (Crystal Oscillator) or
TCXO (Temperature Compensated Crystal
Oscillator). With an OCXO, the temperature
of the crystal and critical circuits are kept
constant as the temperature outside the
oscillator varies. Controlling the temperature
inside the oscillator with an oven maintains
this constant temperature. In an OCXO, the
changes in the ambient temperature are
sensed and then fed back to an oven control
that continually maintains a constant optimum
temperature inside the oscillator enclosure.
An OCXO can improve the crystal's inherent
stability by more than 5000 times. The
oven control system is not perfect, the open
loop gain is not infinite, there are internal
temperature gradients inside the oven
(oscillator) and, in a conventional oven, the
circuitry outside the oven shell is subjected to
ambient temperature changes that can "pull"
the frequency.
T he im proved tem perature stability
performance of a conventional OCXO over an
XO or TCXO comes at a steep price. OCXO
power consumption, for instance, is greater
by a factor of over 200. There is also a size
consideration. In an ordinary OCXO, a
crystal is enclosed in a metal case which is
then placed inside an oven shell together with
temperature sensitive circuitry, and then
Application Note
EX-380/385 Series
4 Pin Dip Evacuated Miniature Crystal Oscillator
Supply Voltage: 3.3 Vdc, 5 Vdc or 12 Vdc available
Aging: <1x10-9 /day, <1x10-7 /year, <1x10-6 /10 years
Temperature Stability: to ±7.5x10-8 over -20oC to +70oC
Acceleration Sensitivity: 1x10-9 /g, Total Gamma
Uses SC Family 3rd Overtone Crystal
Low Power Consumption: <0.35 watts @ +25oC
Frequencies: 10 to 20 MHz (other frequencies in development)
Fast Warm-up: 1 to 2 minutes
Patented Technique*
SONET / SDH, DWDM, FDM, ATM, 3G
Telecom Transmission and Switching Equipment
Wireless Communication Equipment
Military Airborne and Mobile systems
(EMXO)TM
Notes: 1. We acknowledge the support of
the U.S. Army for work on
resonators associated with this
product under contract #1X66001-
97-C-8635.
*U.S. Patent 5,917,272.
Vectron International 267 Lowell Road, Hudson, NH 03051 Tel: 1-88-VECTRON-1 Web: www.vectron.com
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| EX-380-DAD-ST3-G-10.000 | 制造商:VECTRON 制造商全稱:Vectron International, Inc 功能描述:4 Pin DIP & SMD Evacuated Miniature Crystal Oscillator |
| EX-380-DAF-147-A-10.000 | 制造商:VECTRON 制造商全稱:Vectron International, Inc 功能描述:4 Pin DIP & SMD Evacuated Miniature Crystal Oscillator |
| EX-380-DAF-147-F-10.000 | 制造商:VECTRON 制造商全稱:Vectron International, Inc 功能描述:4 Pin DIP & SMD Evacuated Miniature Crystal Oscillator |
| EX-380-DAF-147-G-10.000 | 制造商:VECTRON 制造商全稱:Vectron International, Inc 功能描述:4 Pin DIP & SMD Evacuated Miniature Crystal Oscillator |
| EX-380-DAF-507-A-10.000 | 制造商:VECTRON 制造商全稱:Vectron International, Inc 功能描述:4 Pin DIP & SMD Evacuated Miniature Crystal Oscillator |
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