Data Sheet

EURO QUARTZ
OCXO - OC18T12S
SC-Cut Crystal - Square Wave - 12.0 Volts
1.25MHz ~ 100.0MHz
Frequency Range 1.25MHz to 100.0MHz
20.3 x 20.3 x 10.5mm 5 pin metal, solder-sealed package
Supply Voltage 12.0 Volts
SC-Cut Crystal
Squarewave Output
EFC (Voltage control) as standard
OUTLINE & DIMENSIONS
DESCRIPTION
OC18T12S series oven-controlled crystal oscillators are close
tolerance OCXOs with excellent phase noise performance.
SPECIFICATION
Crystal Cut:
Output Waveform:
Supply Voltage:
Frequency Range:
Initial Calibration Tolerance:
Frequency Stability
over 0° to +60°C:
over -20° to +70°C:
over -40° to +85°C:
vs. Voltage Change:
vs. Ageing:
vs. Load Change:
Warm-up Time:
Voltage Control
Control Voltage Centre:
Freq. Deviation Range:
Control Voltage Range:
Transfer Function:
Input Impedance:
EFC Linearity:
Power Dissipation:
SC-Cut
Square Wave
+12.0 VDC ±0.5V
1.25MHz to 100.0MHz
±0.5ppm max. (at VCON 2.5V)
±0.01ppm
±0.01ppm
±0.03ppm
<±20ppb for ±5% change
±2.0ppb max per day
±0.1ppm per first year
±0.5ppm over 10 years
<±20ppb for ±5% change
1 minute max. to within
±0.1ppm of nominal freq.
+2.5 Volts (VCON)
±0.5ppm min., ±2ppm max.
ref. to 25°C and O.T.R.
2.5V ±2.0Volts
Positive: Increasing control
voltage increases output
frequency.
100k minimum
±10% maximum
200mA max. steady state
500mA max. at turn on
Output
Load:
Output Logic HIGH:
Output Logic LOW:
Duty Cycle:
Rise/Fall Time:
Reference Voltage:
15pF HCMOS
+4.5V minimum
0.5V maximum
50%±10%
5ns max (20%~80%)
Frequency dependant
+4.0±0.3VDC or custom
Envionmental
Storage Temperature:
Shock:
Vibration:
-55° to +125°C
2000g, 0.3ms ½ sine
10 ~2000Hz / 10g
PHASE NOISE (at 10MHz)
Offset
1Hz
10Hz
100Hz
1kHz
10kHz
dBc/Hz
-85
-120
-140
-145
-150
TEST CIRCUIT
PART NUMBER FORMAT
Example:
OC18GT12S-10.000-0.01/-20+70
OCXO Package: OC18
RoHS Compliance
G: RoHS Compliant
Blank: Non-compliant
T: Output Squarewave
12: Supply Voltage 12.0Volts
S: SC-Cut Crystal
Nominal Frequency 10.0MHz
Stability in ppm
Operating Temperature Range °C
Lowest Temperature/Highest Temperature
EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE
Tel: +44 (0)1460 230000 Fax: +44 (0)1460 230001 [email protected] www.euroquartz.co.uk
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