RMO1490A
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SMD Oven Controlled Crystal Oscillator with Low Phase Noise
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Rakon’s Mercury-Hybrid oven controlled crystal oscillator (OCXO) provides comparable
stability to ‘traditional’ OCXOs in a small SMD package while featuring ultra low phase
noise.
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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 a typical power consumption of only
440 mW at room temperature. Due to the use of hybrid technology the RMO1490A features a
typical noise floor of -166dBc/Hz.
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Applications
•
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•
•
•
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Base stations
Communications
Instrumentation
Microwave
Satellite communications
Time & frequency reference
Network timing, synchronisation and IP timing
Small cells
WiMAX/LTE
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Features
• Frequency stability over temperature as low as ±25ppb
• Excellent phase noise performance
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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
Rakon part number
Description
Package size
Description
MxxxxLF, iss. A (2013-10-22) - PROVISIONAL
RMO1490A Ultra Low Phase Noise Mercury Hybrid
14.6 mm x 9.7 mm x 6.7 mm (Max.)
2.0
Line
2.1
2.2
2.3
2.4
FREQUENCY CHARACTERISTICS
Parameter
Nominal frequency
range
Frequency calibration
Reflow shift
Frequency stability
over temperature in
still air
Temperature range
Frequency slope in
still air
Supply voltage
stability
Load sensitivity
Warm-up time
Acceleration
sensitivity
Test Condition
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 2,
note 3)
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...
±5pF
variation, reference to frequency at 15pF, 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...
Value
5 to 50
±0.5 max
±1 max
±10 to 100
Unit
MHz
ppm
ppm
ppb
2.5
2.6
2.7
2.8
2.9
2.10
-40 to 85
±1 to 3
±10
±10
3
2
°C
ppb/°C
ppb
ppb
minutes
ppb/g
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Page 1
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
Parameter
Root Allan Variance
Root Allan Variance
Root Allan Variance
Root Allan Variance
Root Allan Variance
Test Condition
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
Typical value for a 20 MHz unit at 25°C, tau = 100s
Typical value for a 20 MHz unit at 25°C, tau = 1000s
Value
7
7
7
8
8
Unit
E-11
E-11
E-11
E-11
E-11
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
Nominal value to be specified, note 6 & 7
Warm up, -40°C to 85°C devices, typical...
Warm up, -20°C to 70°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
Value
2.7 to 5.5
1500
1200
500 max
440 max
Unit
V
mW
mW
mW
mW
7.0
Line
7.1
7.2
7.3
7.4
7.5
7.6
7.7
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CONTROL VOLTAGE (Vc) - OPTION
Parameter
Control voltage (Vc)
Frequency tuning
range
Frequency tuning
linearity
Slope
Port input impedance
Modulation bandwidth
No control voltage
Typical value
Option B: pin 1 - Do Not Connect (fixed frequency)
Test Condition
Option A: pin 1 - Control voltage (note 8)
Reference to frequency at Vc=1.5V
Deviation from linear over control voltage range in accordance
with MIL-PRF-55310
Positive
80 min
3.5
kΩ
kHz
Value
0.5 to 2.5
±5 min
1 max
Unit
V
ppm
%
8.0
Line
8.1
8.2
8.3
8.4
8.5
8.6
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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
10% to 90%
At 50% level
Nominal load 15pF
Test Condition
HCMOS
10 max
90 min
4 max
45 to 55
0 to 30
%Vcc
%Vcc
ns
%
pF
Value
Unit
Page 2
9.0
Line
9.1
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 19.2 MHz carrier at 25°C
Value
-65
Unit
dBc/Hz
9.2
Typical value for a 19.2 MHz carrier at 25°C
-92
dBc/Hz
9.3
Typical value for a 19.2 MHz carrier at 25°C
-120
dBc/Hz
9.4
Typical value for a 19.2 MHz carrier at 25°C
-142
dBc/Hz
9.5
Typical value for a 19.2 MHz carrier at 25°C
-160
dBc/Hz
9.6
Typical value for a 19.2 MHz carrier at 25°C
-165
dBc/Hz
9.7
Typical value for a 19.2 MHz carrier at 25°C
-166
dBc/Hz
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10.0
Line
10.1
10.2
ENVIRONMENTAL
Parameter
Storage temperature
RoHS
Parts are fully compliant with the European Union directives
2002/95/EC & 2011/65/EU on the restriction of the use of certain
hazardous substances in electrical and electronic equipment
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
Test Condition
Value
-55 to 125
Unit
°C
10.3
10.4
10.5
10.6
10.7
10.8
10.9
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Acceleration steady
state
Moisture sensitivity
Temperature cycling
Solder ability
Humidity
Shock
Vibration
11.0
Line
11.1
PIN CONNECTIONS
Parameter
Pin 1
Description
Control voltage, Vc (note 8)
or
Do Not Connect
(depending on option selected - see model builder)
NC
GND
Output
NC
Supply voltage, Vcc - for correct operation decouple the supply voltage with a 10
µF
capacitor
close to the oscillator
11.2
11.3
11.4
11.5
11.6
Pin 2
Pin 3
Pin 4
Pin 5
Pin 6
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12.0
Line
12.1
12.2
12.3
12.4
12.5
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MARKING
Parameter
Type
Line 1
Line 2
Line 3
Line 4
Description
Laser marked
rakon
Part number (Mxxxx)
Frequency in MHz (xx.x MHz)
Pin 1 identifier (indent), date / location code (YYWWX)
Page 3
13.0
Line
13.1
13.2
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MANUFACTURING INFORMATION
Parameter
Reflow
Packaging description
Description
IPC/JEDEC J-STD-020, see Pb-Free solder reflow profile attached
Quantities >100 pieces will be supplied on tape and reel.
14.0
Line
14.1
14.2
SPECIFICATION NOTES
Parameter
Note 1
Note 2
Description
Standard frequencies are 10, 12.8, 19.2, 20, 25, 26 and 38.88 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
14.3
14.4
14.5
14.6
14.7
14.8
Note 3
Note 4
Note 5
Note 6
Note 7
Note 8
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15.0
Line
15.1
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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Page 4
Drawing Name: RMO1490A Mercury Hybrid OCXO
Page 5
