Model 148
OCXO - Ultra Miniature, Ultra Low Power
Shock Resistant
Features
8MHz to 100MHz frequency range
RoHS Status
Industrys smallest OCXO
Fast warm-up (to 45s)
Eco-friendly < 200mW power consumption
HCMOS output
Shock and vibration resistant construction
Applications
Airborne and Ground Mobile
PLL Reference for Telecommunication Systems
Portable (Battery Operated ) Devices
Guidance Systems
Instrumentation / Test and Measurement
Description
The Model 148 uses an SC-cut crystal technology with arrangement of the whole oven system together with the
crystal oscillator inside the TO-8 vacuum holder to radically reduce the OCXO size, power consumption, and its
warm-up time. As a result, the Model 148 provides excellent temperature stability, low phase-noise and aging.
Special internal heating resonator (IHR) design enables extra-high shock resistance and durability - a distinctive
feature of this model.
Electrical Specifications
Parameter Symbol Condition Min Typ Max Unit Note
Frequency
F 8 100 MHz
Range
Initial 0.1 For 10MHz oscillator
F/F ppm
Calibration 0.2 For 100MHz oscillator
Vs. Operating temp.
5 ppb See How to Order
C: -10C to 60C
F/F
Frequency
Vs. Supply voltage 2 ppb V 5%
CC
Stability
Vs. Aging / Day 0.5 ppb After 30 days.
Vs. Aging / Year 0.05 ppm See How to Order
Operating
Temperature T See How to Order
-40 +85 C
Range
G-sensitivity Worst direction 1 ppb/G
1Hz -97
10Hz -127
SSB Phase For 10MHz oscillator
100Hz -152 dBc/Hz
Noise
1kHz -162
10kHz -166
Supply 4.75 5.0 5.25
V V
CC
Voltage 3.14 3.3 3.46
75 South Street, Hopkinton, MA 01748 800-982-5737 508-435-6831 FAX 508-497-6377 www.ctsvalpey.com RevA0313
Specifications are subject to change without notice
1
Model 148
OCXO - Ultra Miniature, Ultra Low Power
Shock Resistant
Electrical Specifications
Parameter Symbol Condition Min Typ Max Unit Note
Power warm-up state 1.0 1.1
P W
Consumption steady state, at +25 C 0.23 0.25
-7
to F/F=1 E , @+25 C, Ref. to frequency
Warm-up Time 45 60 sec
after 15mins.
V =5.0V
CC
10MHz output
10kOhms // 15pF
frequency
HCMOS / TTL
Output
V 3.8 V
H
Levels
V 0.4 V
L
At 10MHz output
Rise / Fall time T /T 10 ns
R F
frequency
Duty Cycle 45 55 %
V =5V 0 4.2 Tuning slope -
CC
Control Voltage V V
C
V =3.3V 0 2.8 positive
CC
Frequency
0.5 1.0 ppm Monotonic
Tuning Range
V =5V 4.1 4.2 4.5
CC
V
Reference Output V
REF
V =3.3V 2.7 2.8 2.9
CC
Environmental and Mechanical Conditions
Parameter Condition
Storage Temperature -60C to +90C
Humidity Non-condensing 95%
Mechanical Shock Per MIL-STD-202, 500G, half sine pulse, 11ms
Vibration Per MIL-STD-202, 30G swept sine 10 to 2000Hz
Soldering Conditions Hand solder only
Markings Epoxy ink or laser engraved
75 South Street, Hopkinton, MA 01748 800-982-5737 508-435-6831 FAX 508-497-6377 www.ctsvalpey.com RevA0313
Specifications are subject to change without notice
2