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 a
2.8, 3.0, 3.3 or 5.0 volt supply.
Vectron International: 267 Lowell Road, Suite 102, Hudson NH 03051
Tel: 1-88-VECTRON-1
e-mail: vectron@vectron.com
VTC4 Data Sheet
Performance Characteristics
Table 1. Electrical Performance
Parameter
Frequency
1
Typical Supply Voltage
Ordering option, see last page
Supply Current
10.000 MHz to < 15.000 MHz
15.000 MHz to 27.00 MHz
2
Output Level
Output Load
Control Voltage Impedance
Control Voltage to reach pull
All options (5.0, 3.3,3.0 and 2.8V)
Pull Range
Ordering option, see last page
Temperature Stability
Ordering option, see last page.
Initial Accuracy, “No Adjust” option
Power Supply Stability
Load Stability
Aging
Operating temperature
Ordering option, see last page
Phase Noise, 12.800MHz
10 Hz offset
100 Hz offset
1 kHz offset
10 kHz offset
100 kHz offset
5MHz offset
Start-up time
Symbol
f
O
Min
Typical Maximum
10.000
27.000
2.8, 3.0, 3.3 or 5.0
Units
MHz
V
mA
1.5
2.0
Vp/p
Z
Vc
0.8
10K II 10pf
1
0.5
TPR
±5, ±8, ±10, ±15
±0.5 to ±5.0
±0.5
2.5
ppm
ppm
Mohm
V
V
I
DD
±1.0
ppm
±0.2
ppm
±0.2
ppm
±1.0
ppm/year
0/55, -10/60, -20/70, -30/80, -40/85
°C
dBc/Hz
-89
-113
-137
-150
-155
-156
2
ms
1. A 0.01uF and a 0.1uF capacitor should be located as close to the supply as possible (to ground) is recommended.
2. Output is DC coupled
.
Vectron International: 267 Lowell Rd, Suite 102, 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, Suite 102, 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 where 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 where the VTC4 will not be used in a PLL, or the output frequency
does not fine tune adjustments, the best device to use would be a VTC4-x0xx. 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
GND or
V
C
2
GND
3
f
O
4
V
DD
Function
Ground for a VTC4-x0xx option
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
Devices will be marked with the frequency
Figure 3, Package drawing
Vectron International: 267 Lowell Rd, Suite 102, 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)
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
J
F
D
A
E
C
G
B
L
I
H
K
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
Table 5. Environmental Compliance
Parameter
Mechanical Shock
Mechanical Vibration
Temperature Cycle
Solderability
Gross and Fine Leak
Resistance to Solvents
Moisture Sensitivity Level
Contact Pads
Ratings
-55/125
Unit
°C
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
1
Gold over Nickel
Vectron International: 267 Lowell Rd, Suite 102, Hudson NH 03051
Tel: 1-88-VECTRON-1
e-mail: vectron@vectron.com
DSP 与 ARM 处理器
