OCXO 8682/ 8683
Oven Controlled Crystal Oscillator
Product Description
The 8682/3
series offer superior stability performances in a 50.8 x 50.8 x 25mm (2” x 2” x 0.98”)
industry standard package.
Its
frequency drift due to temperature variations is minimized by using SC Cut crystals and double
oven technology.
This
technique enables the crystal resonator to operate at a constant temperature, leading
to a minimum frequency deviation (down to 2x 10-10) regardless of the ambient temperature range.
The
guaranteed aging performance is between 1 and 3 E-8/year. The long term stability of the OCXO
allows a reachable operational period of up to 15-20 years.
Sine
or HC-Mos compatible outputs are available. Furthermore, with a US industry standard footprint,
the oscillator will provide a compact solution for new developments and an excellent second source for
existing designs.
Features
SC cut - 3rd overtone crystal resonator
Wide operating temperature range (- 20°C to 70°C)
Sine or HC-MOS / TTL-compatible output
Thermal stability and ageing
Option Low phase noise / Low aging
Benefits
Selectable long term stability
Easily interfaces with analog or digital circuits
Fits all telecommunications requirements
Low profile 25 mm (< 1 inch) high
Edition April 2003
Oscilloquartz S.A. Rue des Brévards 16, 2002 Neuchâtel, Switzerland / Tel +41 32 722 55 55 / Fax +41 32 722 55 12
Email: osa.xo@oscilloquartz.com / Internet: www.oscilloquartz.com
OCXO 8682/ 8683
Technical Specification
Standard / Option
Crystal resonator
Standard frequencies
Operating temperature range (X)
Standard
SC-cut, 3rd overtone
4.096 / 5 / 8.192 / 10 / 16.384 MHz
A:-
20°C to +70° C
1.024 to 40 MHz
B:
0°C to +70° C
C:
0°C to +60° C
Frequency stability (D f/f)
Long term stability
(aging after 30 days of continuous operation)
2 x 10
-10
/day
5 x 10
-9
/month
3 x 10
-8
/year
-10
G:
1 x 10 /day
-11
H
: 5 x 10 /day
-11
J
: 3 x 10 /day
Option
see table
Over temperature range (Y)
Std : < 4 x 10
-9
pp
-10
2:
< 2x 10 pp
see table
Versus supply voltage changes (Vcc ± 5%)
Versus load changes (50
Ω
± 10%)
Short term stab.
σ( τ )
(0.2 to 10s) Allan variance
Electronic frequency control (v)
Power Supply (P)
Input voltage range (DC)
8682:
+24 Volts ± 5%
8683:
+12 Volts ± 5%
Power consumption
Environment (not operating)
Storage temperature
Vibration
Shock
Size (L x W x H)
Weight
Outline and electrical connections
Outputs Characteristics (Z)
Wave form
Level (Tol.) / Impedance
Phase noise
Harmonics
Spurious in the frequency range up to 1MHz
Symmetry
Rise / Fall time (10 / 90%, 12pF)
Internal reference voltage
Pin 6 : Vref out (R
Load
< 3 x 10
-10
< 5 x 10
-11
< 1 x 10
-11
> ± 0.3 ppm (0V to 10V) with linearity < 5%
9V to 30V
Consult factory
< 2.5 W after warm-up at 25°C,< 8W during warm-up
-40°C to +125°C
MIL-STD 167-1
50 g, 11ms, 3 shocks in each direction of the main axis
50.8 x 50.8 x 25.0 mm (2.00" x 2.00" x 0.98")
100 g
see drawing
S
Sine
> 4 dBm / 50
Ω
see table
< - 25 dBc
< - 70 dBc
not applicable
not applicable
T
Square
HCMOS / TTL compatible
Consult factory
not applicable
not applicable
40% - 60%
10 ns
> 20 kΩ)
Std 7.8 Volts, on request 6.0 to 8.5 Volts ( source resistance 1 kΩ )
Vref out ± 3 mV
Stability vs temperature range
Edition April 2003
Oscilloquartz SA reserves the right to change all specifications contained herein at any time without prior notice
2
OCXO 8682/ 8683
Technical Specification
Phase noise (BW = 1 Hz)
Frequencies
5 MHz
Standard
Phase noise
1 Hz
10 Hz
100 Hz
1'000 Hz
-100 dBc
-130 dBc
-140 dBc
-145 dBc
Option L
-110 dBc
-132 dBc
-140 dBc
-145 dBc
8.192 MHz
Standard
-100 dBc
-130 dBc
-140 dBc
-145 dBc
Option L
-105 dBc
-132 dBc
-140 dBc
-145 dBc
10 MHz
Standard
-90 dBc
-120 dBc
-135 dBc
-145 dBc
Option L
-100 dBc
-130 dBc
-140 dBc
-150 dBc
Aging
Standard
Aging per day
Aging per year
after continuous operation of
Applicable for
2E-10
3E-8
30 days
Option G
1E-10
2E-8
30 days
Option H
5E-11
1.5E-8
60 days
4 - 10 MHz
Option J
3E-11
1E-8
90 days
4 - 5 MHz
1.024 - 40 MHz 1.024 - 10 MHz
Frequency stability vs temperature range
Standard
Frequency stability (peak to peak)
Valid for temperature range
4 E-9 pp
A/B/C
Option 1
1 E-9 pp
A/B/C
Option 6
6 E-10 pp
A/B/C
Option 2
2 E-10 pp
A/B/C
Warm-up time and Retrace
Warm up time: Switch on +30 minutes @ +25°C: F
0
* = ±1 × E-9
*F
0
referring to the frequency measured after 6 hours of being switched on.
Retrace: F
0
±1 × E-9 referring to frequency measured before being switched off.
Condition: Switch off for 24 hours then measurement is performed after 2 hours of being switched on.
Edition April 2003
3
OCXO 8682/ 8683
Technical Specification
Outline and Electrical connections
All dimensions in mm (inches)
Pin-out connections
1: GND
2: Oven control (option)
3: +Power supply
4: Alarm oven control (option)
5: Vc input
6: Vref out
7: Output frequency
Ordering Information
Example :
Type
Model
3: +12V DC
Operating temperature range
A: Standard
Frequency stability over temperature range
1: < 1E-9 peak peak
Output signal
S: Sine wave
Option aging
G: 1E-10/day
Option Low phase noise
L: Low phase noise
Nominal frequency output
5 MHz
Edition April 2003
868X - A -
1
- S - G -
L
5 MHz
4
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