VTC2 series
Voltage Controlled Temperature Compensated Crystal Oscillator
Features
•
CMOS Square Wave Output
•
Enable Disable Feature
•
Output Frequencies to 30 MHz
•
Fundamental Crystal Design
•
Optional VCXO function available
•
Gold over nickel contact pads
•
Hermetically Sealed Ceramic SMD package
The VTC2, VCTXCO
•
Product is compliant to RoHS directive
and fully compatible with lead free assembly
Applications
•
FPGA’s
•
A/D’s
•
DSL Head End
•
Wireless Communications
•
Base Stations
•
Point to point radios
•
Broadband Access
•
Test Equipment
Description
Vectron’s VTC2 Temperature Compensated
Crystal Oscillator (TCXO) is a quartz stabilized,
CMOS squarewave, 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
VTC2 Data sheet
Performance Characteristics
Table 1. Electrical Performance
Parameter
Frequency
Supply Voltage
Maximum Supply Voltage
Supply Current, +3.3V
Output Level
2
Logic High
Logic Low
Drive High
Drive Low
Output Load
Duty Cycle, @ 50%
Control Voltage Impedance
Control Voltage to reach pull
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
Enable/Disable
3
Output Active
Output Disabled
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
Start-up time
Symbol
f
O
Min
Typical Maximum
10.000
30.000
3.3V±10% or +5V ±5%
6
10.0
0.9*V
DD
0.1*V
DD
-4
4
15pf
45/55
Z
Vc
TPR
100
0.5
±5, ±8
±0.5 to ±5.0
±1.0
±0.3
±0.2
±1.0
0.8*V
DD
0.2*V
DD
0/55, -10/60, -20/70, -30/80, -40/85
°C
dBc/Hz
-93
-123
-147
-155
-158
2
ms
2.5
%
Kohm
V
ppm
ppm
ppm
ppm
ppm
ppm/year
V
Units
MHz
V
DC
V
DC
mA
V
V
mA
mA
I
DD
V
OH
V
OL
I
OH
I
OL
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.
3. Output is active if E/D is open.
Vectron International 267 Lowell Rd, Hudson NH 03051
Tel: 1-88-VECTRON-1
e-mail: vectron@vectron.com
VTC2 Data sheet
VCXO Functional Description
VCXO Feature:
The VTC2 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 high impedance, 1 Mohm, input 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 VTC2 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 VTC2-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 or left open
(but not set to a voltage such as the supply).
Outline Diagrams, Pad Layout and Pin Out
Table 2. Pinout
Pin #
Function
Pin #
Function
1
No Connect (VTC2-x0xx)
10
Supply Voltage
or VCXO Control Voltage
2
Make No Connection
9
Enable/Disable
3
Make No Connection
8
Make No Connection
4
Make No Connection
7
Make No Connection
5
Electrical Ground
6
Output Frequency
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.
Contact Pads are gold over nickel
Figure 2, Package drawing
Vectron International 267 Lowell Rd, Hudson NH 03051
Tel: 1-88-VECTRON-1
e-mail: vectron@vectron.com
VTC2 Data sheet
Tape and Reel
Table 3. Tape and Reel Dimensions (mm)
Tape Dimensions
Product
A
VTC2
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
Ratings
-55/125
Unit
°C
Reliability
The VTC2 qualification tests have included:
Table 5. Environnemental Compliance
Parameter
Mechanical Shock
Mechanical Vibration
Temperature Cycle
Solderability
Gross and Fine Leak
Resistance to Solvents
Moisture Sensitivity Level
Contact Pads
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, Hudson NH 03051
Tel: 1-88-VECTRON-1
e-mail: vectron@vectron.com
VTC2 Data Sheet
Handling Precautions
Although ESD protection circuitry has been designed into the the VTC2, proper precautions should be taken
when handling and mounting. VI employs a Human Body Model and a Charged-Device Model (CDM) for
ESD susceptibility testing and design protection evaluation. ESD thresholds are dependent on the circuit
parameters used to define the model. Although no industry wide standard has been adopted for the CDM, a
standard HBM of resistance = 1.5kohms and capacitance = 100pF is widely used and therefore can be
used for comparison purposes.
Table 6. ESD Ratings
Model
Human Body Model
Charged Device Model
Minimum
1500
1000
Conditions
MIL-STD-883 Method 3115
JESD 22-C101
Suggested IR profile
Devices are built using lead free epoxy and can also be subjected to standard lead free IR reflow conditions,
Table 7 shows max temperatures and lower temperatures can also be used e.g. peak temperature of 220C.
Table 7. Reflow Profile (IPC/JEDEC J-STD-020B)
Parameter
Symbol
PreHeat Time
t
S
Ramp Up
R
UP
Time Above 217
o
C
Time To Peak Temperature
Time At 260
o
C (max)
Time At 240 °C (max)
Ramp Down
t
L
t
AMB-P
t
P
t
p2
R
DN
Value
150 sec Min, 200 sec Max
3
o
C/sec Max
60 sec Min, 150 sec Max
480 sec Max
10 sec Max
60 sec Max
6
o
C/sec Max
Vectron International 267 Lowell Rd, Hudson NH 03051
Tel: 1-88-VECTRON-1
5
e-mail vectron@vectron.com
模拟与混合信号
