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EWOS5500
Low Power OCXO (NewSpace), Flight Proven
DIMENSIONS & PINOUT
© Syrlinks - 28 Rue Robert Keller, ZAC des Champs Blancs - 35510 Cesson-Sévigné, France
For further information, please contact us: time-frequency@syrlinks.com - www.syrlinks.com - Tel: +33 (0)2 99 00 94 52
Safety
Time
Frequency
DefenseSpace
EWOS5500 provides the world best trade-off between performances, reliability & cost while high precision and
low power OCXO is needed for large scale Space projects. It is an ideal choice for large or very large satellite
constellations. EWOS5500 offers excellent short-term stability, low thermal sensitivity and can be delivered in
several thousand units at low cost. It is Flight Proven since Feb. 2019 and can be used for NewSpace (GNSS
positioning, Ranging or TTC Radios functions) for mini or micro-satellites with LEO orbit. EWOS5500 uses
Syrlinks’ proprietary ASIC that has been tested against radiations up to 100 kRad.
ORDERING INFORMATION
PIN NUMBER FUNCTION
1 Do not connect
2 Ground
3 RF Out
4 Power Supply
PRODUCT OVERVIEW
EWOS5500 V1.0 | Updated on 29th november 2019 |This document is the property of Syrlinks. Information contained is not contractual & is susceptible to modifications without advance notice.
KEY FEATURES
20 MHz
±0.25 ppm typical frequency stability in -40°C/+75°C
335 mW @ -40°C (typ.)
High mechanical robustness: MIL-STD-883 M2002 Cond B: 1500g / 0.5ms / 1/2 sine
High resistance to radiations (aggravated tests have been performed up to 100Krad)
EWOS 5500
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ELECTRICAL CHARACTERISTICS
PARAMETERS Unit Min Typ. Max Note Comments
Output Frequency MHz 20 1 Nominal frequency
Frequency Tolerance ppm ±0.5 ±2 1 @ +25°C, referred to nominal frequency
Temperature Range
• Operating °C -40 +75
• Storage °C -55 +85
Supply Voltage V 5 ± 5%
Supply Current
•Warm up mA 200 250 2
• Steady state / -40°C mA 67 73 1
• Steady state / +25°C mA 33 37 1 Quiet environmenet conditions
• Steady state / +75°C mA 8 12 1
Warm-up time s 90 2 1E-7 accuracy referred to frequency mea-
sured at 25°C. To achieve 1E-10 short term
stability - quiet environment
mn 15 2
Frequency Stability
• Vs temperature variation ppb ±250 ±500 1 -40°C to +75°C unless otherwise specified
• Vs supply voltage variation ppb ±50 ±100 2 5V ± 5%
• Vs load variation ppb ±50 ±100 2 (10 KΩ//10 pF) ± 10%
• Short-term (tau=1s) 9E -11 3E-10 2 Allan deviation
• Medium-term stability
Slope /mn ±2E -9 ±5E-9 1 Thermal slope 30°C/hour
Sigma 1E-9 3E-9 1
• Aging
ppm ±0.25 ±1 2 First year
ppm ±1 ±3 2 10 years
Radiation Effects (without shielding) 100 krad radiation
Frequency shift See CNES report DCT/RF/
HT/2006/0021806
Oscillator ON ppm +0.66 2
Oscillator OFF ppm +0.24 2
Phase Noise
• 100 Hz dBc/Hz -135 -125 2
• 1 KHz dBc/Hz -150 -145 2
Output Level
Vpp 1.0 1.7 2
Clipped sinewave - DC cut - Load 10KΩ//
10 pF - Note: LC network recommended at
output (see typical application drawing)
Output Impedance KΩ 1 2
pF 5 2
EWOS5500
Low Power OCXO (NewSpace), Flight Proven
© Syrlinks - 28 Rue Robert Keller, ZAC des Champs Blancs - 35510 Cesson-Sévigné, France
For further information, please contact us: time-frequency@syrlinks.com - www.syrlinks.com - Tel: +33 (0)2 99 00 94 52
EWOS5500 V1.0 | Updated on 29th November 2019 | This document is the property of Syrlinks. Information contained is not contractual & is susceptible to modifications without advance notice.
Notes
1. Parameter inspected at 100%
2. Parameter guaranteed by design
NONCONFORMITY
PIND MIL-STD-883-M2020 Cond.A Not compliant
PIND test not performed in production
RGA H
2
O
Relative Humidity Level
MIL-STD-883 M1018 Not compliant
RH level between 2500 ppm and 10 000 ppm
given as indicative value, not guaranteed
PIND test not performed in production and EWOS5500 is non-compliant with PIND standard MID.