VTC4 series
Voltage Controlled Temperature Compensated Crystal Oscillator
Features
•
Clipped Sine Wave Output
•
Output Frequencies to 27 MHz
•
Fundamental Crystal Design
•
Optional VCXO Function available
•
Gold over nickel contact pads
•
Hermetically Sealed Ceramic SMD package
The VTC4, VCTXCO
•
Product is compliant to RoHS directive
and fully compatible with lead free assembly
Applications
•
Wireless Communications
•
Base Stations
•
Point to point radios
•
Broadband Access
•
Test Equipment
•
Handsets
Description
Vectron’s VTC4 Temperature Compensated
Crystal Oscillator (TCXO) is a quartz stabilized,
clipped sine wave output, temperature
compensated oscillator, operating off either 2.8,
3.0, 3.3 or 5.0 volt supply.
Vectron International 267 Lowell Road, Hudson NH 03051
Tel: 1-88-VECTRON-1
e-mail: vectron@vectron.com
VTC4 Data Sheet
Performance Characteristics
Table 1. Electrical Performance for the Clipped Sine Wave Output Option
Parameter
Symbol
Min
Typical Maximum
Frequency
f
O
10.000
27.000
Typical Supply Voltage
2.8V, 3.0V, 3.3V or 5.0V
Ordering option, see last page
Supply Current
I
DD
10.000 MHz to < 15.000 MHz
1.5
15.000 MHz to 27.00 MHz
2.0
Output Level
Vp/p
0.8
Output Load
10K II 10pf
Control Voltage Impedance
Z
Vc
1
Control Voltage to reach pull
All options (5.0, 3.3,3.0 and 2.8V)
0.5
2.5
Pull Range
TPR
±5, ±8, ±10, ±15 or ±20
Ordering option, see last page
Temperature Stability
±0.5 to ±5.0
Ordering option, see last page.
Initial Accuracy, “No Adjust” option
±0.5
Power Supply Stability
±0.2
Load Stability
±0.2
Aging
±1.0
Operating temperature
0/55, -10/60, -20/70, -30/80, -40/85
Ordering option, see last page
Phase Noise, 12.800MHz
10 Hz offset
-89
100 Hz offset
-113
1 kHz offset
-137
10 kHz offset
-150
100 kHz offset
-155
5MHz offset
-156
Start-up time
2
Units
MHz
mA
V
Mohm
V
ppm
ppm
ppm
ppm
ppm
ppm/year
°C
dBc/Hz
ms
1. A 0.01uF and a 0.1uF capacitor should be located as close to the supply as possible (to ground) is recommended.
Vectron International 267 Lowell Rd, Hudson NH 03051
Tel: 1-88-VECTRON-1
e-mail: vectron@vectron.com
VTC4 Data Sheet
Figure 1. Typical Phase Noise Plot
Figure 2. Clipped Sine Wave Output
Vectron International 267 Lowell Rd, Hudson NH 03051
Tel: 1-88-VECTRON-1
e-mail: vectron@vectron.com
VTC4 Data Sheet
VCXO Functional Description
VCXO Feature:
The VTC4 can be ordered with a VCXO function for applications were it will be used in a
PLL, or the output frequency needs fine tune adjustments. This is a high impedance input, 1 Mohm, and can
be driven with an op-amp or terminated with adjustable resistors etc.
Pin 1 should not be left floating
on
the VCXO optional devices.
“No Adjust” Feature:
In applications were the VTC4 will be not be used in a PLL, or the output frequency
does not fine tune adjustments, the best device to use would be a VTC4-x0xxx. By using the “no adjust”
option, the circuit is simplified as Vc does not need to adjusted or set to a predetermined voltage and
pin 1
should be grounded
(pin 1 can be left open but should not be set to a voltage such as the supply).
Outline Diagrams, Pad Layout and Pin Out
Table 2. Pinout
Pin #
Symbol
1
N/C
or
V
C
2
GND
3
f
O
4
V
DD
Function
No Connect (VTC4-x0xx)
or VCXO Control Voltage
Electrical and Case Ground
Output Frequency
Supply Voltage
NOTE: Additional pads are used to program and adjust the TCXO during manufacturing and should be left
open; do not terminate these to the supply voltage. Some designs do not include these additional pads.
Contact Pads are gold over nickel
Figure 3, Package drawing
Vectron International 267 Lowell Rd, Hudson NH 03051
Tel: 1-88-VECTRON-1
e-mail: vectron@vectron.com
VTC4 Data Sheet
Tape and Reel
Table 3. Tape and Reel Dimensions (mm)
J
F
D
A
E
C
G
B
L
I
H
K
Tape Dimensions
Product
A
VTC4
16
B
7.5
C
1.5
D
4
E
8
Reel Dimensions
F
G
H
1.5
20.2
13
I
60
J
2
K
16.4
L
180
# Per
Reel
1000
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can permanently damage the device. Functional
operation is not implied at these or any other conditions in excess of conditions represented in the
operational sections of this data sheet. Exposure to absolute maximum ratings for extended periods may
adversely affect device reliability.
Table 4. Absolute Maximum Ratings
Parameter
Symbol
Storage Temperature
Tstorage
Ratings
-55/125
Unit
°C
Reliability
The VTC4 qualification tests have included:
Table 5. Environnemental Compliance
Parameter
Mechanical Shock
Mechanical Vibration
Temperature Cycle
Solderability
Gross and Fine Leak
Resistance to Solvents
Conditions
MIL-STD-883 Method 2002
MIL-STD-883 Method 2007
MIL-STD-883 Method 1010
MIL-STD-883 Method 2003
MIL-STD-883 Method 1014
MIL-STD-883 Method 2015
Vectron International 267 Lowell Rd, Hudson NH 03051
Tel: 1-88-VECTRON-1
e-mail: vectron@vectron.com
Real-time operating system RTOS
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