VTC1 series
Voltage Controlled Temperature Compensated Crystal Oscillator
Features
•
Clipped Sine Wave Output
•
Output Frequencies to 40 MHz
•
Fundamental Crystal Design
•
Optional VCXO function available
•
Gold over nickel contact pads
•
Hermetically Sealed Ceramic SMD package
•
Product is compliant to RoHS directive
and fully compatible with lead free assembly
The VTC1, VCTCXO
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, 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
VTC1 Data sheet
Performance Characteristics
Table 1. Electrical Performance for the Clipped Sine Wave Output Option
Parameter
Symbol
Min
Typical Maximum
Units
Frequency
f
O
10.000
40.000
MHz
1
Typical Supply Voltage
2.8, 3.0, 3.3 or 5.0
V
Ordering option, see last page
Supply Current
I
DD
mA
10.00 MHz to < 15.00 MHz
1.5
15.00 MHz to < 26.00 MHz
2.0
26.00 MHz to 40.00 MHz
2.5
2
Output Level
Vp/p
0.8
V
Output Load
10K II 10pf
Control Voltage Impedance
Z
Vc
1
Mohm
Control Voltage to reach pull
V
All options (5.0, 3.3,3.0 and 2.8V)
0.5
2.5
Pull Range
TPR
±5, ±8, ±10, ±15
ppm
Ordering option, see last page
Temperature Stability
±0.5 to ±5.0
ppm
Ordering option, see last page.
3
Initial Accuracy, “No Adjust” option
±1.0
ppm
Power Supply Stability
±0.2
ppm
Load Stability
±0.2
ppm
Aging
±1.0
ppm/year
Operating temperature
0/55, -10/60, -20/70, -30/80, -40/85
°C
Ordering option, see last page
Phase Noise, 12.800 MHz
dBc/Hz
10 Hz offset
-85
100 Hz offset
-115
1 kHz offset
-130
10 kHz offset
-143
100 kHz offset
-152
Start-up time
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 AC coupled.
3. Initial Accuracy is +/-2.0ppm after 2 IR reflows.
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
Units
Frequency
f
O
10.000
40.000
MHz
Supply Voltage
3.3V±5%
V
DC
Maximum Supply Voltage
7
V
DC
Supply Current
I
DD
10.0
mA
2
Output Level
0.9*V
DD
Logic High
V
OH
V
Logic Low
V
OL
0.1*V
DD
V
I
OH
-4
mA
Drive High
I
OL
4
mA
Drive Low
3
Rise and Fall Time
t
R
/t
F
3
ns
Output Load
15pf
Duty Cycle, @ 50%
45/55
%
Control Voltage Impedance
Z
Vc
100
Kohm
Control Voltage to reach pull
0.5
2.5
V
Pull Range
TPR
±5, ±8, ±10
ppm
Ordering option, see last page
Temperature Stability
±0.5 to ±5.0
ppm
Ordering option, see last page.
4
Initial Accuracy, “No Adjust” option
±1.0
ppm
Power Supply Stability
±0.3
ppm
Load Stability
±0.2
ppm
Aging
±1.0
ppm/year
Operating temperature
0/55, -10/60, -20/70, -30/80, -40/85
°C
Ordering option, see last page
Phase Noise, 12.800MHz
dBc/Hz
10 Hz offset
-93
100 Hz offset
-123
1 kHz offset
-147
10 kHz offset
-155
100 kHz offset
-158
Start-up time
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.
3. Rise and Fall time is measured at 20/80% levels
4. Initial Accuracy is +/-2.0ppm after 2 IR reflows.
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 where 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 where the VTC1 will 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.
It’s recommended to not have traces routed underneath the devices.
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
嵌入式系统
