參數(shù)資料
型號: XA979
廠商: Vectron International, Inc.
元件分類: 溫度/濕度傳感器
英文描述: Temperature Sensor(Frequencies Range Between 2 And 30 MHz)(溫度傳感器(頻率范圍: 2至 30 MHz))
中文描述: 溫度傳感器(頻率范圍2至30兆赫)(溫度傳感器(頻率范圍:2至30兆赫))
文件頁數(shù): 1/2頁
文件大?。?/td> 62K
代理商: XA979
Special Crystals
166 Glover Avenue
Norwalk, CT 06856
Tel: 1-88-VECTRON-1
Fax: 1-888-FAX-VECTRON
www.vectron.com
Temperature Sensors
KVG's temperature sensors are crystals with a very high dependence of the frequency from the
temperature. The gradient of the frequency-temperature (f/t) characteristic as well as its linearity depend on
the orientation of the crystal blank with respect to the crystal axes and therefore they can be varied within
certain limits. The fundamental frequencies range between 2 and 30 MHz depending on the enclosure. For
higher frequencies the crystals operate in the 3rd or 5th overtone.
There are two basic types with many possible variations:
1) XA 979:
This type has the highest linearity of the f/t-characteristic. Its production is however more complicated and
the fabrication spread is larger than that of the second type.
2) XA 1024:
In comparison with the sensors of type XA 979 the f/t-characteristic is less linear but the fabrication spread
of the thermal data is smaller.
Special types according to customer specifications upon demand.
Technical data:
1) Electrical data:
The values of C
1
, L
1
, R
1
and Co depend on the crystal frequency, the overtone and the enclosure. Generally
the quality factor is higher than 50000.
2) Thermal data:
a) Gradient of the f/t-characteristic:
XA 979: 37 ppm/K
±
1.5%
XA1024: depending on the orientation. 30ppm/K to 94ppm/K
±
0.5%
b) Deviation from linearity:
XA 979: < 0.1K from 0°C to 100°C
XA 1024: depending on the orientation
c) Calibration at 25°C:
±
500ppm
d) Time constant: depending on the crystal enclosure e.g. for HC-52/U approx. 3sec.
e) Aging (1st year): < 5ppm (or better if required)
3) Crystal enclosures: HC-52/U, HC-49/U, HC-35/U, HC-51/U
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