XR-U Datasheet, PDF (2/4 Pages) Vectron International, Inc – XR-U (HC37 or TO-8) Series Cold Weld

Typical Electrical Performance Characteristics
Performance Characterisitc
Frequency Range
Operating Temperature Range
Frequency Stability over Operating Temp Range
Frequency Calibration Tolerance +25^oC
Equivalent Series Resistance
Shunt Capacitance
Motional Capacitance
Load Capacitance
Drive Level
Aging per year after first 30 days
AT-CUT VARIETIES
Symbol
Typical Performance Specifications
F_O
2.5 MHz to 140 MHz
-55^oC to +125^oC (high temperature up to +200^oC available)
F_T
F_R-F_L
R (ESR)
+/- 5 ppm to +/- 50 ppm (mode, frequency and operating temp range dependent)
+/- 10 ppm typical (+/- 1 ppm available)
10 ohms to 100 ohms (mode and frequency dependent)
C₀
2.5 pF - 4 pF typical (MIL-PRF-3098 CR101, CR102, CR103 types < 7 pF max.)
C₁
0.1 fF - 30 fF (mode and frequency dependent)
C_L
series to 32 pF (customer specified load)
DL
100 uW (50 uW to 5 mW)
< 0.5 ppm (better available)
DOUBLY ROTATED (DR)-CUT VARIETIES (SC, MODIFIED SC, IT, ETC...)
Performance Characterisitc
Symbol
Typical Performance Specifications
Frequency Range
Turn Point
F_O
2.5 MHz to 140 MHz
TP
+75^oC to +105^oC (mode, cut, frequency dependent, other turn points available)
Frequency Calibration Tolerance
Equivalent Series Resistance
F_R-F_L
R (ESR)
+/- 1 ppm to +/- 5 ppm typical
15 ohms to 180 ohms (mode and frequency dependent)
Shunt Capacitance
Motional Capacitance
Load Capacitance
Drive Level
C₀
2.5 pF - 4 pF typical
C₁
0.1 fF - 30 fF (mode and frequency dependent)
C_L
series to 32 pF (customer specified load)
DL
100 uW (50 uW to 5 mW)
Aging per year after first 30 days
< 0.5 ppb/day (mode-cut and frequency dependent, consult factory)
PHASE NOISE @ 100 Hz OFFSET (dBc/Hz)
Mode - Cut
Frequency Range
Phase Noise
Fundamental-AT
Fundamental-DR
3^rd OT - AT
3^rd OT - DR
5^th OT - AT
5^th OT - DR
7^th OT - AT
2.5 MHz - 20 MHz
5 MHz - 60 MHz
15 MHz - 100 MHz
25 MHz - 140 MHz
-80 to -120
-80 to -135
-120 to -150
-115 to -140
-115 to -140
-80 to -110
Phase Noise performance is mode and frequency dependent
NOMINAL G-SENSITIVITY (4 pt. blank mount)
Cut
G-SENSITIVITY
AT
1 X 10^-9 /g (average attainable when specified)
DR (SC-IT)
5 x 10^-10/g (average attainable when specified)
Results assume same frequency and mode when specified. Better results are available.
TYPICAL ESR & C₁ BY MODE AND FREQUENCY RANGE
Mode
Frequency Range
(MHz)
*ESR Typical
(ohms)
*C₁ Typical
(fF)
Fund.
2.5 - 20 MHz
25-360
5 - 25
3^rd
5 - 60 MHz
50-140
1 -2.5
5^th
15 - 100 MHz
50-120
0.70
7^th
25 - 140 MHz
<120
0.35
*ESR and C1 values are dependent upon the specified frequency and mode of vibration.
EQUIVALENT CIRCUIT OF A CRYSTAL RESONATOR
Vectron International designs and manufactures HC37 series crystals for a wide variety of commercial and high reliabilty
applications. Our proven cleanroom finish processes and fully integrated environmental vacuum bake cold weld systems yield
excellent aging and low perturbations.
We have tight controls over series resistance, motional capacitance, temperature characteristics and other parameters critical to your
application. We primarily build to customer specifications but we’ve optimized designs on all frequencies that are commonly used in
telecommunications.
Please feel free to contact us with your questions. We are here to assist you with selecting the best performing and most cost
effective crystal for your application.
Vectron International • 4914 Gray Road • Cincinnati, OH 45232 • Tel: [phone] • Tel: 1-88-VECTRON-1 • http://www.vectron.com