VFTX250
TCXO – Ultra Low Power
2.5x2.0mm SMD, Clipped Sine wave
Features
10 – 52 MHz Frequency Range
2.8V or 2.5V Supply Voltage
Low power consumption
TCXO and VCTCXO models available
RoHS Status
Applications
Portable Communications
GPS
Electrical Specifications
Parameter
Frequency
Range
Symbol
F
vs. Temperature
vs. Supply Voltage
(±5%)
Frequency
Stability
∆F/F
vs. Load (±10%)
Aging
Operating
Temperature
Tolerance
Supply
Voltage
Supply
Current
Control
Voltage
Pull Range
Input
Impedance
VCTCXO models only
V
DD
Icc
10MHz
≤
Fo < 26MHz
26MHz
≤
Fo
≤
52MHz
0.4
5
500
T
25 °C
1 hour after reflow
2.66
2.375
2.8
2.5
-40
Condition
Min
10
0.5
Typ
Max
52
2.5
0.2
ppm
0.2
1.0
+85
2.0
2.94
2.625
2.0
2.5
2.4
ppm/yr
C
ppm
V
mA
V
ppm
KΩ
Ref. to
nominal
frequency
Order Code L
Order Code G
See “How to
Order” chart
for available
options
Unit
MHz
Note
Ref. to +25°C
frequency
See “How to
Order chart for
available
options
Max Current
across entire
temp range
75 South Street, Hopkinton, MA 01748 • 800-982-5737 • 508-435-6831 • FAX 508-435-5289 • www.valpeyfisher.com • RevC0911
1
VFTX250
TCXO – Ultra Low Power
2.5x2.0mm SMD, Clipped Sine wave
Electrical Specifications
Parameter
Output
Level
Phase Noise
Start up time
100Hz
1KHz
10KHz
Symbol
Condition
Min
Typ
Max
Unit
Note
DC cut
Capacitor
required
Clipped sine wave Load: 10 KΩ // 10pF
0.8
-115
-135
-148
2
Vp-p
dBc/Hz
ms
@ 19.2MHz
How to Order
VFTX250
—
—
FREQUENCY, MHz
Frequency Stability
Code
Specification
L
±0.5ppm
K
± 1.0ppm
J
± 1.5ppm
H
± 2.0ppm
G
± 2.5ppm
Temp. Range
Code
Specification
A
0°C ~ +50°C
C
-10°C ~ +60°C
D
-20°C ~ +70°C
F
-30°C ~ +85°C
G
-40°C ~ +85°C
Supply Voltage
Code
Specification
G
2.5V
L
2.8V
Code
T
A
B
C
Pullability
Specification
Type
N/A
TCXO
±5ppm
VCTCXO
±8ppm
VCTCXO
±10ppm
VCTCXO
Available Frequency Stabilities over Operating Temperature Ranges
Code
A
C
D
F
G
Temperature
Range
0°C to +50°C
-10°C to +60°C
-20°C to +70°C
-30°C to +85°C
-40°C to +85°C
±0.5ppm
±1.0ppm
±1.5ppm
±2.0ppm
±2.5ppm
º
º
º
º
º
º
º
º
º
º
º
º
º
º
º
º
º
º
º
º
º
º
* Available case by case
75 South Street, Hopkinton, MA 01748 • 800-982-5737 • 508-435-6831 • FAX 508-435-5289 • www.valpeyfisher.com • RevC0911
2
VFTX250
TCXO – Ultra Low Power
2.5x2.0mm SMD, Clipped Sine wave
Environmental and Mechanical
Parameter
Mechanical Shock
Thermal Shock
Vibration
Soldering Conditions
Hermetic Seal
Storage Temperature
Specification
Per MIL-STD-202, Method 213, Condition E
Per MIL-STD-883, Method 1011, Condition A
Per MIL-STD-883, Method 2007, Condition A
260C for 10s max
Leak rate less than 5x10
-8
atm.cc/s of helium
-55C to +125C
Top View
Bottom View
Pin #
1
2
3
4
Connection
Vc (VCTCXO models)
GND (TCXO models)
GND
Output*
V
DD
* Note: DC cut capacitor (series blocking capacitor)
required at OUTPUT. 150pF NPO recommended.
75 South Street, Hopkinton, MA 01748 • 800-982-5737 • 508-435-6831 • FAX 508-435-5289 • www.valpeyfisher.com • RevC0911
3
嵌入式系统
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