OCXOs
OCXOs
CFPO-SC Series
(Hi-Reliable OCXO - Up to “Stratum 2” performance - No re-calibration over time)
ISSUE 1; 19 OCTOBER 2004
Description
■The CFPO-SC series are a range of OCXO’s removing the need
for customers to re-calibrate their equipment over the
lifetime of operation
Main performances are:-
■Free-run stability range over lifetime operation from:
±1.6x10-8 (CFPO-SC1 for replacing Rubidium clocks)
to ±1x10-7 (CFPO-SC4)
■Holdover range over 24 hours operation:
From 7µs over -20 to 70°C (CFPO-SC2) to 10µs with ±15°C
ambient change
Package Options (metal leaded package, hermetically sealed)
■CFPO-SC-1 50.8 x 50.8 x 38.0mm (50B)
■CFPO-SC-2 50.8 x 50.8 x 25.0mm (50)
■CFPO-SC-3 51.0 X 41.0 X 25.0mm (51)
■CFPO-SC-4 40.0 X 30.0 X 20.0mm (40)
Supply Options
■Standard: 12V ±5% (12)
■Optional: 15V (15)
Standard Frequencies
■5.0, 8.192, 10.0, 10.24MHz
Frequency Range
■5.0 to 15.0MHz
■Higher frequencies may be available upon request
■Initial tolerance @ 25°C Fo ±1x10-8
Power Consumption (CFPO-SC1 / others)
■Warm-up: <7.0W / 6.0W
■@25°C: <2.5W / 1.8W (calm air)
Warm Up Time @ 25°C (typical)
■±1x10-8 after 15 mins (for CFPO-SC1)
■±1x10-8 after 10 mins (for others)
Retrace after 24 Hours on / 24 Hours off @25°C
■±2x10-9 after 60 minutes
Frequency Adjustment
■> ±5.0x10-8 from 0V to reference voltage
■EFC monotonic and positive slope (negative optional)
Oven Alarm “logic level” signal (optional) (A)
■Logic “0” during warm-up time and if oven is not operating
■Logic “1” when temperature regulation is operating
Reference Voltage Ouput (optional no reference voltage)
■CFPO-SC-1 pkg 50B 8.0V±0.3V
■CFPO-SC-2 pkg 50 8.2V±0.3V (options = 5V / 6.2V)
■CFPO-SC-3 pkg 51 8.2V±0.3V (options = 5V / 6.2V)
■CFPO-SC-4 pkg 40 8.0V±0.3V
Output Compatibility
■Sinewave +7dBm ±2dBm into 50Ωload (S)
■Squarewave optional (C)
Harmonic Distortion
■Harmonics < -40dBc
■Spurious < -80dBc
Phase Noise 10.0MHz typical (sinewave)
■1Hz -100dBc/Hz
■10Hz -130dBc/Hz
■100Hz -145dBc/Hz
■1kHz -155dBc/Hz
■10kHz -158dBc/Hz
Environmental Specification (non-operating)
■Storage temperature range -55 to 85°C
■Shock - half-sine 50g 11ms / 3 per direction
IEC 68-2-27 Test Ea / Severity 50A
■Vibration - 10g / 10-500Hz IEC 68-2-06 Test
Fc / Severity 500/10
Marking (printed label on top of can)
■C-MAC or Customer’s Logo
■Nominal Frequency (Fo) in MHz
■Serial Number (1 letter & 5 numbers )
■Date Code (4 digits for year and week)
Europe Tel: +44 (0)1460 270200 Fax: +44 (0)1460 72578 Website: www.cmac.com
Americas Tel: +1 919 941 9333 Fax: +1 919 941 9371
Asia Tel: +86 755 8826 5991 Fax: +86 755 8826 5990
OCXOs
Electrical Specification
Operating
Temperature
Range
Stability
within
Temperature
Range
pk to pk
Long Term Stability
(after frequency recovery)
Frequency
Stability Vs
Supply Voltage
Change (±5%)
and Load
Change
(50Ω±10%)
Cumulated
Over
Lifetime
(all causes)
Reference
Voltages
Standard
Package type
(max height)
Model
Number
Per Day Per Month Per Year Over 15 Years
-20 to 70°C
<1x10-10 <±2x10-11 <±6x10-10 <±5x10-9 <±1.5x10-8 <±5x10-11 <±1.6x10-8 8.0V±0.3V (50B) 38mm CFPO-SC-1
<2x10-10 <±5x10-11 <±1.5x10-9 <±1.2x10-8 <±3.5x10-8 <±1x10-10 <±5.0x10-8 8.2V±0.3V
Option 5 or 6.2V (50) 25mm CFPO-SC-2
<5x10-10 <±1x10-10 <3x10-9 <±1.5x10-8 <±5x10-8 <±2x10-10 <±7.0x10-8 8.2V±0.3V
Option 5 or 6.2V (51) 25mm CFPO-SC-3
<1x10-9 <±2x10-10 <5x10-9 <±3x10-8 <±9x10-8 <±5x10-10 <±1.0x10-7 8.0V±0.3V (40) 20mm CFPO-SC-4
Ordering Example CFPO-SC-1 50B S 12 A 8.0 10.0MHz
Model Number
Package Outline 50B : 50 : 51 : 40 (see above table)
Output Signal (S) (Sine is standard) (C) (Optional HCMOS)
Supply Voltage (12) (15) (12V is standard)
Oven Alarm Option (A)
Reference Voltage 8.0, 8.2, 5.0, 6.2 (+ Optional: N = No reference voltage)
Frequency (MHz)
For non standard options such as different temperature ranges, negative slope EFC, cold start-up then please contact our
sales office.
Europe Tel: +44 (0)1460 270200 Fax: +44 (0)1460 72578 Website: www.cmac.com
Americas Tel: +1 919 941 9333 Fax: +1 919 941 9371
Asia Tel: +86 755 8826 5991 Fax: +86 755 8826 5990
OCXOs
Packages without Oven Alarm Packages with Oven Alarm
32.3
50.8SQ max
5.0 40.6SQ
∅1.0±0.05
All tolerances ±0.2mm
38.0 max
12
54
3
3 screws M3
Pin Function
1. Input frequency control
2. Output reference
voltage
3. Output signal
4. Mechanical GND
and (-) supply
5. Input supply (+)
6
20.3 20.3
Bottom View
Outline in mm - Package 50B
Outline mm - Package 50
50.8SQ max
5.0
40.6SQ
∅1.0±0.05
All tolerances ±0.2mm
25.0 max
12
54
3
Pin Function
1. Input frequency control
2. Output ref. voltage
3. Output signal
4. Mechanical GND
and (–) supply
5. Input supply (+)
Bottom View
20.3 20.3
Outline in mm - Package 51
∅1.0±0.05
5.0
25.0 max
213
5
4
41.0 max
51.0 max
42.0
32.0
Bottom View
All to lerances ±0.2m m
Pin Function
1. Mechanical
GN D and supply
2. Frequency control
input
3. Ref.voltage output
4. Supply input
5. Signal output
Outline in mm - Package 40
17.8
25.4
22.9
30.0 max
40.0 max
1
2
34
6
5
All tolerances ±0.2mm
19.5 max
∅0.8±0.05
4.0±0.5 0.95
Pin Function
1. Input frequency control
2. Output reference
voltage
3. Input supply (+)
4. Output signal
5. Mechanical GND
and (-) supply
Bottom
View
Outline in mm - Package 50B
32.3
50.8SQ max
5.0 40.6SQ
∅1.0±0.05
All tolerances ±0.2mm
38.0 max
12
54
3
3 screws M3
Pin Function
1. Input frequency control
2. Output reference
voltage
3. Output signal
4. Mechanical GND
and (-) supply
5. Input supply (+)
6. Oven alarm
6
20.3 20.3
Bottom View
Outline in mm - Package 50
50.8SQ max
5.0
40.6SQ
∅1.0±0.05
All tolerances ±0.2mm
25.0 max
12
54
3
Pin Function
1. Input frequency control
2. Output ref. voltage
3. Output signal
4. Mechanical GND
and (–) supply
5. Input supply (+)
6. Oven alarm
Bottom View
20.3 20.3
6
Outline in mm - Package 51
Outline in mm - Package 40
17.8
25.4
22.9
30.0max
40.0 max
1
2
34
6
5
All tolerances ±0.2mm
19.5 max
∅0.8±0.05
4.0±0.5
0.95
Pin Function
1. Input frequency control
2. Output reference
voltage
3. Input supply (+)
4. Output signal
5. Mechanical GND
and (-) supply
Bottom
View
Europe Tel: +44 (0)1460 270200 Fax: +44 (0)1460 72578 Website: www.cmac.com
Americas Tel: +1 919 941 9333 Fax: +1 919 941 9371
Asia Tel: +86 755 8826 5991 Fax: +86 755 8826 5990