EX-240 Evacuated Miniature Oven Controlled Crystal Oscillator
EMXO
TM
EX-240 Series
Evacuated Miniature Crystal Oscillator
EMXO
TM
Description
The EX-240 Series offers a ruggedized hybrid thick film construction in a low profile
hermetically sealed 16pin DDIL package, which can withstand severe environmental
conditions. This product utilizes VI’s EMXO
TM
technology resulting in excellent stability
performance and fast warm-up with low power consumption.
Features
•
•
•
•
•
•
Temperature Stability to +/-3 x 10
-8
over -20
o
C to +70
o
C
Low power consumption: <0.7W @ 25
o
C, <1.1W @-40
o
C
Low profile package: 0.93”(W) x 1.03” (L) x 0.35” (H)
Fast warm-up: 2 minutes @ 25
o
C
Frequencies:10 to 20MHz
Patented Technique
(U.S. Patent 5,917,272)
Performance Characteristics
Parameters
Frequency
Supply Voltage
Power Consumption
Warm-up Time @ 25
o
C
Temperature
D
C
Turn-on Power for 2 minutes @ 25
o
C
Steady State @ 25
o
C
Steady State @ -40
o
C
<1 x 10
-6
<1 x 10
-7
Operating
Storage
Duty Cycle
Rise/Fall Time (10% to 90% Vdd) with15pF Load
Logic Level “0”
Logic Level “1”
Sine into 50Ohms Load
Sine into 50Ohms Load
Harmonics
Spurious
0
o
C to +70
o
C Reference to Frequency @ 25
o
C
-20
o
C to +70
o
C Reference to Frequency @ 25
o
C
-40
o
C to +85
o
C Reference to Frequency @ 25
o
C
+/-5% of Supply Voltage
+/-5% of Load Change
After 7 days of operation
1
st
Year
10 to <12MHz
12 to <16MHz
16 to 20MHz
Tau = 1 second
@ 10Hz
@ 100Hz
@ 1kHz
@ 10kHz
@ 100kHz
Reference to nominal frequency
Initial Accuracy reference to nominal frequency
Test at 10g sine vibration at 100Hz
Options
Conditions
units
MHz
V
V
W
W
W
Sec
Sec
o
C
o
C
%
nSec
Volt
Volt
dBm
dBm
dBc
dBc
ppb
ppb
ppb
ppb
ppb
ppb/day
ppb/year
ppb/10year
ppb/10year
ppb/10year
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
ppm
/g
Minimum
10
3.135
4.75
Typical
3.3
5.0
Maximum
20
3.465
5.25
2.5
0.70
1.10
90
120
+85
+85
60
7
0.1Vdd
3
6
-25
-60
+/-20
+/-30
+/-50
+/-10
+/-10
2
200
1000
1500
2000
2 x 10
-10
-100
-130
-140
-145
-150
+1.0
1 x 10
-9
-55
-55
40
CMOS Output
A
G
H
Sine Output
0.9Vdd
0.0
3.0
1.5
4.5
Stability
C-208
D-308
F-508
Aging
Allan Deviation
Phase Noise
EFC (0V to Vdd)
Fixed Frequency
G-Sensitivity
A
F
Sufficient to compensate 10 years aging
-1.0
Vectron International - 267 Lowell Road, Hudson, NH 03051 - Tel: 1-88-VECTRON-1 - Web:
www.vectron.com
-1-
EX-240 Evacuated Miniature Oven Controlled Crystal Oscillator
Environmental Conditions (Designed to meet)
•
•
•
•
Mechanical Shock (survive):
Vibration Random (survive):
Vibration Sine (survive):
Thermal Shock (survive):
MIL-STD-202, Test Method 213, Condition E (1000G, 0.5msec)
MIL-STD-202, Test Method 214, Condition I-H (20Grms, 3 minutes/axis)
MIL-STD-202, Test Method 204, Condition D (20Grms, 20 minutes/axis)
MIL-STD-202, Test Method 107, Condition A-2 (50 Cycles, -55
o
C to +85
o
C)
EMXO
TM
Package Outline
Pin #
1
2-4
8
9
13-15
16
Pin Function
With EFC
EFC
No Connection
(Internal use only)
Case/GND
Output
No Connection
Supply
Fixed Frequency
No Connection
No Connection
(Internal use only)
Case/GND
Output
No Connection
Supply
Pin numbers are for reference only. They do not appear on unit
Reflow
Profile
Reflow
Profile
220
TEMPERATURE (
o
C)
183
150
60s
60-90s
45-60s
TIME (s)
Ordering Information
EX
EX=
EMXO
-
240
-
C
A
D
-
508
A
-
12.8000
Output Frequency
10.0000 MHz
12.8000 MHz
13.0000 MHz
16.3840 MHz
20.0000 MHz
MHz
Package
240
Supply Voltage
D
= 3.3 Vdc +/-5%
C
= 5.0 Vdc +/-5%
Other Options
A
= Electrical Frequency Control (EFC)
F
= Fixed Frequency
Output
A
= CMOS
G
= +0dBm sine
H
= +3dBm sine
Temperature & Stability
C-208
= +/-20 ppb over -0
o
C to +70
o
C
D-308
= +/-30 ppb over -20
o
C to +70
o
C
F-508
= +/-50 ppb over -40
o
C to +85
o
C
Vectron International - 267 Lowell Road, Hudson, NH 03051 - Tel: 1-88-VECTRON-1 - Web:
www.vectron.com
-2-
嵌入式系统
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