RFPO50
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SMD Oven Controlled Crystal Oscillator
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Rakon’s Mercury oven controlled crystal oscillator (OCXO) provides comparable stability
to ‘traditional’ OCXOs in a small SMD package.
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Product description
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Using Rakon’s proprietary Mercury ASIC, the OCXO is capable of short term ageing of typically
less than ±2 ppb per day, with temperature stability down to ±10 ppb. The miniature, highly
integrated oven used ensures short warm up times with power consumption of only 350 mW
at room temperature.
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Applications
•
•
•
•
•
•
•
•
Basestation
Broadcasting
Communications
Instrumentation
Microwave
Satellite Communication
Time & frequency reference
Picocell
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Features
• ±20 ppb stability over -40 to 85°C
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Specifications
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1.0
Line
1.1
1.2
1.3
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SPECIFICATION REFERENCES
Parameter
Model description
RoHS compliant
Package size
Description
RFPO50
Yes
2.0
Line
2.1
2.2
2.3
2.4
FREQUENCY CHARACTERISTICS
Parameter
Frequency range
eli
Test Condition
14.6 mm x 9.7 mm x 6.2 mm
m
in
ar
Value
5 to 50
±0.5 max
±1 max
±10 to 100
Unit
MHz
ppm
ppm
ppb
-40 to 85
±0.5 to 2
±10
±10
°C
ppb/°C
ppb
ppb
3
2
minutes
ppb/g
Page 1
Frequency range available (note 1)
At 25°C±2°C, at time of shipment, reference to nominal frequency
(note 2)
After 1 hour recovery at 25°C
Reference to (Fmax+Fmin)/2, see model code builder (note 3)
Frequency calibration
Reflow shift
Frequency stability
over temperature in
still air
Temperature range
Frequency slope
Supply voltage
stability
Load sensitivity
2.5
2.6
2.7
2.8
2.9
2.10
Warm-up time
g-sensitivity
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Pr
The operating temperature range over which the frequency
stability is measured (note 3)
Temperature ramp 1°C/minute max.
±5%
variation, reference to nominal supply voltage, nominal
frequency
≤26
MHz, typical...
15pF
±5pF
(HCMOS) or 10kΏ//10pF
±10%
(Clipped Sinewave),
reference to frequency at nominal load, nominal frequency
≤26
MHz, typical...
Note 4, typically less than...
Gamma vector of all three axes from 30 Hz to 1500 Hz, typically
less than...
y
3.0
Line
3.1
3.2
3.3
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FREQUENCY AGING (nominal frequency ≤26 MHz)
Parameter
Long term stability
Long term stability
Long term stability
Test Condition
Per day (note 5), typically less than...
First year
10 years
Value
±2
±1 max
±3 max
Unit
ppb
ppm
ppm
4.0
Line
4.1
4.2
4.3
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FREQUENCY AGING (nominal frequency >26MHz)
Parameter
Long term stability
Long term stability
Long term stability
Test Condition
Per day (note 5), typically less than...
First year
10 years
Value
±5
±2 max
±5 max
Unit
ppb
ppm
ppm
5.0
Line
5.1
5.2
5.3
5.4
5.5
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ROOT ALLAN VARIANCE
Root Allan Variance
Root Allan Variance
Root Allan Variance
Root Allan Variance
Root Allan Variance
Typical value for a 20 MHz unit at 25°C, tau = 0.1s
Typical value for a 20 MHz unit at 25°C, tau = 1.0s
Typical value for a 20 MHz unit at 25°C, tau = 10s
y
Parameter
Test Condition
Value
7
7
7
8
8
Unit
E-11
E-11
E-11
E-11
E-11
Typical value for a 20 MHz unit at 25°C, tau = 100s
Typical value for a 20 MHz unit at 25°C, tau = 1000s
6.0
Line
6.1
6.2
6.3
6.4
6.5
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POWER SUPPLY
Parameter
Operable supply
voltage range
Input power
Input power
Input power
Input power
Test Condition
in
ar
Page 2
Value
2.7 to 5.5
1000
800
400 max
350 max
Unit
V
mW
mW
mW
mW
Nominal value to be specified, note 6 & 7
Warm up, -40°C to 85°C devices, typical...
Steady state in still air at 25°C, -40°C to 85°C devices
Steady state in still air at 25°C, -20°C to 70°C devices
Line
7.1
7.2
7.3
7.4
7.5
7.6
7.7
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Parameter
Control voltage (Vc)
Frequency tuning
range
Frequency tuning
linearity
Slope
eli
Test Condition
7.0
CONTROL VOLTAGE (Vc) - OPTION
m
Warm up, -20°C to 70°C devices, typical...
Value
0.5 to 2.5
±5 min
1 max
Unit
V
ppm
%
Option A: pin 1 - Control voltage (note 8)
Over control voltage range (reference to frequency at Vc
=1.5 V)
Deviation from linear over control voltage range in accordance
with MIL-PRF-55310
Positive
Port input impedance
Pr
80 min
3.5
kΩ
kHz
Modulation bandwidth
No control voltage
Typical value
Option B: pin 1 - Do Not Connect (fixed frequency)
8.0
Line
8.1
8.2
8.3
8.4
CLIPPED SINE WAVE OSCILLATOR OUTPUT
Parameter
Output waveform
Output voltage level
Output load
resistance
Output load
capacitance
Test Condition
Clipped sinewave, DC coupled
Peak-to-peak voltage measured at minimum supply voltage
(typical value 1.1V)
nominal
nominal
0.8 min
10
10
V
kΩ
pF
Value
Unit
-----
9.0
Line
9.1
9.2
9.3
9.4
9.5
9.6
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HCMOS OSCILLATOR OUTPUT
Parameter
Output waveform
Output voltage level
low (Vol)
Output voltage level
high (Voh)
Rise and fall times
Duty cycle
Output load
Test Condition
HCMOS
Measured with a capacitive load of 15pF
Measured with a capacitive load of 15pF
Measured with a capacitive load of 15pF
Measured at 50% level
Nominal
10 max
90 min
4 max
45 to 55
15
%Vcc
%Vcc
ns
%
pF
Value
Unit
10.0
Line
10.1
SSB PHASE NOISE
Parameter
SSB phase noise
power density at 1 Hz
offset
SSB phase noise
power density at 10
Hz offset
SSB phase noise
power density at 100
Hz offset
SSB phase noise
power density at 1kHz
offset
SSB phase noise
power density at
10kHz offset
SSB phase noise
power density at
100kHz offset
SSB phase noise
power density at
1MHz offset
Test Condition
Typical value for a 12.8 MHz carrier at 25°C
Value
-70
Unit
dBc/Hz
10.2
Typical value for a 12.8 MHz carrier at 25°C
y
-96
dBc/Hz
10.3
Typical value for a 12.8 MHz carrier at 25°C
in
ar
Page 3
-123
dBc/Hz
10.4
Typical value for a 12.8 MHz carrier at 25°C
-143
dBc/Hz
10.5
Typical value for a 12.8 MHz carrier at 25°C
-152
dBc/Hz
10.6
Typical value for a 12.8 MHz carrier at 25°C
-153
dBc/Hz
10.7
Typical value for a 12.8 MHz carrier at 25°C
m
-154
dBc/Hz
11.0
Line
11.1
11.2
11.3
11.4
11.5
11.6
11.7
11.8
11.9
ENVIRONMENTAL
Parameter
Storage temperature
Acceleration steady
state
Moisture sensitivity
eli
Test Condition
-----
Value
-55 to 125
Unit
°C
IEC 60068-2-7 test Ga, 5000g, 10s (at peak acceleration), Y-axis
only
IPC/JEDEC J-STD-020, Class 1
IEC 60068-2-14 test Na, 400 cycles, -40°C to +125°C
JESD 22-B102D, Method 2 Preconditioning 150°C, 16 hours
EIA/JEDEC22-A101, 85°C/85%R.H., 1000 hours
IEC 60068-2-27, test Ea; 1500g, 0.5ms, 18 shocks total
IEC 60068-2-6, test Fc: 20g, 60 to 2000Hz 12 hours total
Parts are fully compliant with the European Union directive
2002/95/EC on the restriction of t he use of certain hazardous
substances in electrical and electronic equipment. Note parts are
suitable for assembly using both Lead-free solders and Tin/Lead
solders
Temperature cycling
Solder ability
Humidity
Shock
Vibration
RoHS
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Pr
12.0
Line
12.1
12.2
12.3
12.4
12.5
12.6
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PIN CONNECTIONS
Parameter
Pin 1: Vc or Do not
connect
Pin 2: NC
Pin 3: GND
Pin 4: Output
Pin 5: NC
Pin 6: Vcc
For correct operation decouple the supply voltage with a 10
µF
capacitor close to the oscillator
Description
Option A: Control voltage (note 8) or Option B: Do Not Connect - see model builder!
13.0
Line
13.1
13.2
13.3
13.4
13.5
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MARKING
Parameter
Type
Line 1
Line 2
Line 3
Line 4
Description
Laser marked
RAKON
Frequency in MHz (xx.x MHz)
Pin 1 identifier (indent), date / location code (YYWWX)
14.0
Line
14.1
MANUFACTURING INFORMATION
Parameter
Reflow
Description
IPC/JEDEC J-STD-020, Package reflow temperature for the Pb-Free process is 250°C, or for
the Sn-Pb eutectic process is 220°C. The solder reflow processes are as per the attached
profiles
Quantities >100 pieces will be supplied on tape and reel.
14.2
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Packaging description
15.0
Line
15.1
15.2
SPECIFICATION NOTES
Parameter
Note 1
Note 2
Description
Standard frequencies are 10, 12.8, 19.2, 20, 25 and 26 MHz. Other frequencies available on
request
The characteristics of the component may be temporarily affected by the processes of
assembly and soldering. The frequency specifications apply 48 hours after assembly. Nominal
conditions apply unless otherwise stated
Stability / temperature range options other than listed may be available upon request. Please
consult sales office for availability
Time needed for frequency to be within
±20
ppb reference to frequency after 1 hour, at 25°C.
Parameter is frequency, assembly and operating history dependent
After 30 days of continuous operation
The oscillator will continue to function over this range but may not meet specified performance
Standard available nominal supply voltages are 3.3 and 5.0 V (±5%), other nominal supply
voltages may be available upon request
The GND of the control voltage needs to be connected directly to pin 3 as ground lead
impedance may cause performance degradation
15.3
15.4
15.5
15.6
15.7
15.8
Note 3
Note 4
Note 5
Note 6
Note 7
Note 8
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16.0
Line
16.1
DISCLAIMER
Parameter
Disclaimer
Description
“Samples
supplied according to this specification are supplied from our development or pre-
production programme and as such are not qualification approved products. No condition,
warranty or representation regarding quality, suitability, performance, life or continuation of
supply is given or implied and Guarantee in clause 6.1 of our standard Conditions of Sale is
not applicable. The right is reserved to change the design or specification or cease supply
without notice.” RAKON UK Limited
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Pr
eli
m
in
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Page 4
y
Part number (Mxxxx)
Drawing Name: RFPO50/55 Model Drawing
Pr
Page 5
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m
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