RMO1490A Datasheet, PDF (1/2 Pages) TEMEX – Frequency stability over temperature as low

IC OCXO | MERCURY ™ ULTRA LOW NOISE SERIES
synchronising connectivity
RMO1490A (Hermetic)
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. The RMO1490A features a typical noise floor of ‐166dBc/Hz.
Features
ƒ Frequency stability over temperature as low as
±10 ppb
ƒ Excellent phase noise performance
Applications
ƒ Small Cells
ƒ Base stations
ƒ Time & frequency reference
ƒ Network timing, synchronisation
and IP timing
14.4 x 9.5 x 6.7 mm max.
Standard Specifications
Parameter
Min.
Nominal frequency
Frequency calibration
Reflow shift
Frequency stability over temperature in
still air
Frequency slope ΔF/ΔT in still air
Operating temperature range
‐40
Supply voltage stability
Load sensibility
Warm‐up time
Typ.
5 ‐ 50
±10
±10
<3
Acceleration sensitivity
Long term stability (Ageing)
Frequency ≤26MHz
Root Allan Variance (20 MHz)
Supply voltage (Vcc)
Input power (warm up)
Input power (Steady state in still air at
25°C)
Control voltage (Vc)
<2
< ±2
7
2.7 – 5.5
1500
1200
0.5 – 2.5
Frequency tuning
Slope
Linearity
Port input impedance
Modulation bandwidth
Oscillator output – HCMOS
Output voltage level high (V_OH)
Output voltage level high (V_OL)
Duty cycle
Rise and fall times
Load
www.rakon.com
±5
+7
80
3.5
90% Vcc
45
0
15
Max.
±0.5
±1
±10 ‐
±100
±1 ‐ ±3
85
±1
±3
500
440
1
10% Vcc
55
4
30
Unit
Test Condition / Description
MHz
Standard frequencies: 10, 12.8, 19.2, 20, 25, 26 and
38.88MHz
ppm
Initial accuracy at 25°C ±2°C
ppm
Pre to post reflow ∆F (measured ≥ 60 minutes after
reflow)
ppb
Reference to (Fmax + Fmin)/2
ppb/°C
°C
ppb
ppb
minutes
ppb/g
ppb
ppm
ppm
10^‐11
V
mW
mW
mW
mW
V
ppm
ppm/V
%
kΩ
kHz
Temperature ramp ≤ 1°C/minute
±5% variation, frequency ≤ 26MHz
±5pF variation, reference to frequency ≤ 26MHz at
15pF
The time needed for the frequency to be within
±20 ppb of the frequency after 1 hour, at 25°C.
This parameter is frequency, assembly and
operating history dependent
Gamma vector of all 3 axes from 30 to 1500Hz
Per day
First year
10 years
tau = 1.0s
±5%
Warm up, ‐40 to 85°C devices
Warm up, ‐20 to 70°C devices
Steady state in still air at 25°C, ‐40 to 85°C devices
Steady state in still air at 25°C, ‐20 to 70°C devices
The GND of the control voltage needs to be
connected directly to pin 3 as ground lead
impedance may cause performance degradation
Reference to frequency at Vc=1.5V
Deviation from linear over control voltage range in
accordance with MIL‐PRF‐55310
V
V
%
At 50% level
ns
10 to 90%
pF
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