Shortform TCXO for COSPAS SARSAT

TCXO
Temperature Compensated Crystal Oscillators
for COSPAS-SARSAT emergency beacon
10.0, 12.688375, 12.688656, 12.688750,
12.80 & 20.0 MHz
TX7-705CM-SQ-CoSa
(7.0 x 5.0 mm)
10.0, 12.678303, 12.80, 16.3840,
20.0 & 25.0 MHz
TX7-503CM-SQ-CoSa
(5.0 x 3.2 mm)
Frequency stability:
vs. temperature
reference to (FMAX+FMIN)/2
≤ ±0.2 ppm
≤ ±0.2 ppm
-40 ~ +55 °C
-20 ~ +55 °C
vs. supply voltage
≤ ±0.1 ppm
±5 %
vs. load
≤ ±0.1 ppm
±5 %
vs. aging
≤ ±1.0 ppm
≤ ±3.0 ppm
1 year
10 years
Class 1 beacon
Class 2 beacon
st
Frequency tolerance @ +25 °C
≤ ±0.5 ppm
Frequency tolerance after reflow
≤ ±1.0 ppm
Allan variance (ADEV)
Medium-term stability:
Mean slope ΔF/dt after 15 min power-up:
steady state
during temperature ramp
Residual ΔF (rms) from slope
< 0.1 ppb (1x10-10)
@ τ = 0.1 ~ 1.0 s
IAW C/S T.007 and C/S IP TCXO
≤ ±0.7 ppb/min
≤ ±1.7 ppb/min
≤ 2.0 ppb
T = constant
ΔT/dt = ± 5 °C/h
over 18 points
Supply voltage (Vdc)
+3.3 V
±5 %
Supply current
4 mA
Max.
Output signal
CMOS
Output level
VOH > 0.9 x Vdc
VOL < 0.1 x Vdc
Output load
15 pF
±5 %
Symmetry (duty cycle)
Tri-state function
45 % ~ 55 %
Input ≥ 2.3 V or open
Input ≤ 0.9 V or GND
-40 ~ +55 °C
-20 ~ +55 °C
@ ½ Vdc
Output Î oscillation
Output Î high impedance
Class 1 beacon
Class 2 beacon
Operating temperature range
Storage temperature range
-55 ~ +125 °C
Packing units
tape & reel
TX7-705CM-SQ-CoSa
TX7-503CM-SQ-CoSa
Pin function
Pin function
# 1
# 5
# 6
# 9
# 10
#1
#4
#5
#6
#8
Do not connect
GND
Output
Tri-state
Vdc
Do not connect
GND
Output
Tri-state
Vdc
Do not connect: #2, #3, #4, #7 & #8
Do not connect: #2, #3 &, #7
Solder pattern
Solder pattern
Additionally used components
18 Feb. 14
500 or 1’000 pieces
•
•
406 MHz RF SAW filter
121.50 MHz accurate, low power consumption clock oscillator
Made in Switzerland
Page 2 of 4
TCXO
Temperature Compensated Crystal Oscillators
for COSPAS-SARSAT emergency beacon
Medium term stability
Frequency stability measurement procedure according the COSPAS/SARSAT T.001
Note #1:
Tmin
Tmin
TON
Tmeas
= -40 °C (Class 1 beacon)
= -20 °C (Class 2 beacon)
= beacon turn-ON time after 2 hours “cold soak”
= start time of frequency stability measurement (TON + 15 min)
Note: #2
The 2 h and 1 h warm-up and stabilisation times are for type approval test of complete beacon.
For testing of TCXO these times may be shortened accordingly.
Test data:
(Example)
Frequency stability vs. temperature ≤ ±0.2 ppm:
over -40 ~ +55 °C
over -20 ~ +55 °C
for Class 1 beacon
for Class 2 beacon
Mean slope ΔF/dt after 15 min power-up:
steady state:
during temp. ramp
≤ ±0.7 ppb/min by T = constant
≤ ±1.7 ppb/min for ΔT/dt = ± 5 °C/h
Residual ΔF (rms) from slope:
over 18 points
18 Feb. 14
≤ 2.0 ppb
Made in Switzerland
Page 3 of 4
TCXO
Temperature Compensated Crystal Oscillators
for COSPAS-SARSAT emergency beacon
Phase noise
Short term stability (ADEV)
Environmental
Reference STD.
Test condition
Vibration sinusoidal
IEC 60028-2-6
IEC 60679-1-5.6.7
Shock
IEC 60028-2-27
IEC 60679-1-5.6.8
Solder ability
IEC 60028-2-20
IEC 60028-2-58
IEC 60679-5.6.3
Test Fc, 30 min per axis
10 Hz – 55 Hz with 0.75 mm, 55 Hz – 2 kHz with 10 g
Test Ea, 3 x per axis, 100 g,
6 ms half sine pulse
Test Ta (235 ±2) °C Method 1
Test Tb Method 1A, 5 s
QuartzCom, more than frequency
QuartzCom AG
Bischmattstrasse 11
CH 2544 Bettlach
Switzerland
18 Feb. 14
Fax
Tel
E-Mail
+41 32 644 24 05
+41 32 644 24 00
[email protected]
www.quartzcom.com
Made in Switzerland
Page 4 of 4