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参数资料
| 型号： | EX385-DAF-107F-16.384MHZ |
| 厂商： | VECTRON INTERNATIONAL |
| 元件分类： | OCXO, clock |
| 英文描述： | OCXO, CLOCK, 16.384 MHz, HCMOS OUTPUT |
| 文件页数： | 2/7页 |
| 文件大小： | 770K |
| 代理商： | EX385-DAF-107F-16.384MHZ |
surrounded by
thermal
insulation.
All
this, plus any additional circuitry are then
placed in a metal housing making for a bulky
package, which becomes very difficult to
miniaturize.
To overcome these obstacles, the EX-380
Series EMXO (Evacuated Miniature Oven
Controlled Crystal Oscillator) was specifically
developed to achieve OCXO performance
wh i l e s i g ni f i cantl y l ower i n g power
consumption and reducing package size.
These characteristics go hand in hand since
reducing package size makes it easier to
improve power consumption. First, the
volume of the package was made as small as
possible to reduce the volume that the oven
needs to heat. Secondly, the most effective
insulation needed to be used. In the EX-380
Series, Vectron has done both. The package
was designed to single DIP dimensions of
0.82" x 0.52" x 0.3", and the oscillator uses a
vacuum as the insulation medium - a dramatic
improvement over conventional polyfoam or
fiber based insulation material. Another great
contributor to Vectrons efforts to reduce size
and still provide "oven oscillator" performance
was to eliminate the use of large packaged
crystals which, up until now, had to be used to
achieve good aging. Instead, a way to use an
open crystal blank was found and made
practical. Vectron has succeeded in resolving
outgassing and contamination issues which
could degrade performance. To do this
required manufacturing the oscillator with a
high internal vacuum level, with low internal
outgassing, to provide the needed thermal
insulation. A high level of cleanliness was
needed to prevent contamination of the open
(un-encased) crystal blank and to ensure
exceptional long term crystal aging.
Figure 1. EX-380 Functional Block Diagram
The key design feature of this package
utilized the concept of integrating the precision
crystal in blank form in combination with
hybrid microelectronics circuitry. In doing this,
obtaining good aging performance was
paramount. For this reason, a cold welded
package was chosen rather than a more
traditional resistance welded package. Cold
weld sealing provided a true metallurgical
bond between ductile metal surfaces without
added heat from the sealing process. Under
the high tonnage pressure introduced through
the indentation of the welding die, a plasticity
flow of material takes place on the mating
surfaces. The end result is a hermetically
sealed enclosure without contamination from
weld splashes, dust and vapors. And, most
important, cold weld sealed enclosures
achieve a high level of vacuum integrity.
Power
Transistor
&
Resistor
Oven
Control
Circuitry
Thermistor
+Vcc
Output
Buffer
Stage
(HCMOS)
Precision
VCXO
+/-1.0ppm
Output
Upper
Substrate
Lower
Substrate
Crystal
Blank
10MHz
3rd OT
Voltage
Regulator
+Vcc
Vectron International 267 Lowell Road, Hudson, NH 03051 Tel: 1-88-VECTRON-1 Web: www.vectron.com
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PDF描述 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| EX-385-DAF-147-A-10.000 | 制造商:VECTRON 制造商全称:Vectron International, Inc 功能描述:4 Pin DIP & SMD Evacuated Miniature Crystal Oscillator |
| EX-385-DAF-147-F-10.000 | 制造商:VECTRON 制造商全称:Vectron International, Inc 功能描述:4 Pin DIP & SMD Evacuated Miniature Crystal Oscillator |
| EX-385-DAF-147-G-10.000 | 制造商:VECTRON 制造商全称:Vectron International, Inc 功能描述:4 Pin DIP & SMD Evacuated Miniature Crystal Oscillator |
| EX-385-DAF-507-A-10.000 | 制造商:VECTRON 制造商全称:Vectron International, Inc 功能描述:4 Pin DIP & SMD Evacuated Miniature Crystal Oscillator |
| EX-385-DAF-507-F-10.000 | 制造商:VECTRON 制造商全称:Vectron International, Inc 功能描述:4 Pin DIP & SMD Evacuated Miniature Crystal Oscillator |
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