VTC1 series
Voltage Controlled Temperature Compensated Crystal Oscillator
Features
•
Clipped Sine Wave or Square Wave Output
•
Output Frequencies to 40 MHz
•
Fundamental Crystal Design
•
Optional VCXO function available
•
Gold over nickel contact pads
•
Hermetically Sealed Ceramic SMD package
The VTC1, 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 VTC1 Temperature Compensated
Crystal Oscillator (TCXO) is a quartz stabilized,
clipped sinewave output or 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
Performance Characteristics
Table 1. Electrical Performance for the Clipped Sine Wave Output Option
Parameter
Symbol
Min
Typical Maximum
Frequency
f
O
10.000
40.000
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 < 26.00 MHz
2.0
26.000 MHz to 40.000 MHz
2.5
2
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, 12.800 MHz
10 Hz offset
-85
100 Hz offset
-115
1 kHz offset
-130
10 kHz offset
-143
100 kHz offset
-152
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.
2. Output is AC coupled.
Vectron International 267 Lowell Rd, Hudson NH 03051
Tel: 1-88-VECTRON-1
e-mail: vectron@vectron.com
VTC1 Data sheet
Table 2. Electrical Performance for the CMOS Output Option
Parameter
Symbol
Min
Typical Maximum
Frequency
f
O
10.000
40.000
Supply Voltage
3.3V±10%
Maximum Supply Voltage
7
Supply Current
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
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
I
DD
V
OH
V
OL
I
OH
I
OL
0.9*V
DD
0.1*V
DD
-4
4
15pf
45/55
Z
Vc
TPR
100
0.5
±5, ±8, ±10
±0.5 to ±5.0
±0.5
±0.3
±0.2
±1.0
0/55, -10/60, -20/70, -30/80, -40/85
2.5
10.0
Units
MHz
V
DC
V
DC
mA
V
V
mA
mA
%
Kohm
V
ppm
ppm
ppm
ppm
ppm
ppm/year
°C
dBc/Hz
-93
-123
-147
-155
-158
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, Hudson NH 03051
Tel: 1-88-VECTRON-1
e-mail: vectron@vectron.com
VTC1 Data sheet
Figure 1. Typical Phase Noise Plot, Clipped Sine Wave
Figure 2. Clipped Sine Wave Output
Vectron International 267 Lowell Rd, Hudson NH 03051
Tel: 1-88-VECTRON-1
e-mail: vectron@vectron.com
VTC1 Data sheet
VCXO Functional Description
VCXO Feature:
The VTC1 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 VTC1 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 VTC1-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 3. Pinout
Pin #
Symbol
1
N/C
or
V
C
2
GND
3
f
O
4
V
DD
Function
No Connect (VTC1-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
ADI Reference Circuit
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