VT-820
Temperature Compensated Crystal Oscillator
Previous Vectron Model VTM3
VT-820
Description
Vectron’s VT-820 Temperature Compensated Crystal Oscillator (TCXO) is a quartz stabilized, clipped sine wave output, analog
temperature compensated oscillator, operating off either 2.8, 3.0 or 3.3 volt supply, hermetically sealed 3.2x2.5 ceramic package.
Features
•
•
•
•
•
•
±
0.5pmm Temperature Stability
Clipped Sine Wave Output
Output Frequencies to 45 MHz
Fundamental Crystal Design
Optional VCXO Function available
Hermetically Sealed Ceramic SMD package
•
•
•
•
•
•
•
•
•
Applications
GPS
WiMAX, Wi-Fi,Wi-LAN
Seismic Exploration
Wireless Communications
Base Stations
Point to point radios
Broadband Access
Test Equipment
Handsets
• Product is compliant to RoHS directive
and fully compatible with lead free assembly
Block Diagram
V
DD
Crystal
Output
Analog
Temperature
Comp.
Vcontrol or NC
Gnd
Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com
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Performance Specifications
Specifications
Table 1. Electrical Performance
Parameter
Output Frequency
Supply Voltage,
1
(Ordering Option)
Supply Current, 8 to 19.999MHz
20.000 to 31.9999MHz
32.000 to 45.000MHz
Operating Temperature, (Ordering Option)
Stability Over T
OP
,, (Ordering Option)
Initial Accuracy, “No Adjust” Option
Power Supply Stability
Load Stability
Aging
Pull Range, (Ordering Option)
Control Voltage to reach Pull Range
Control Voltage Impedance
Output Level
2
Output Load
Phase Noise, 10.000MHz
10Hz
100Hz
1kHz
10kHz
100kHz
Start Up Time
1. The VTM3 power supply pin should be filtered, eg, a 0.1 and 0.01uf capacitor
2. The Output is DC coupled
-91
-116
-137
-149
-150
10
ms
V
O
p/p
TPR
0.5
500
0.8
10K II 10pF
dBc/Hz
±5, ±8, ±10, ±12, ±15
2.5
Symbol
f
O
V
DD
I
DD
Min.
8
Typ
+2.8, +3.0 or +3.3
Max
45
1.5
2.0
2.5
Units
MHz
V
mA
T
OP
0/55, -10/60, -20/70, -30/80, -30/85, -40/85
±0.5, ±1.0, ±.5, ±2.0, ±2.5, ±3.0, ±4.0, ±5.0
±1.0
±0.2
±0.2
±1.0
°C
ppm
ppm
ppm
ppm
ppm/yr
ppm
V
Kohm
V
Outline Drawing
3.2±0.1
Dimensions in mm
Description
Recommended Pad Layout
1.32±0.1
1.0±0.1
2.5±0.1
Frequency
Date Code
1.02±0.1
0.45±0.1
0.8±0.1
1.60±0.1
1.27±0.1
1
2
3
0.9±0.1
0.08±0.1
Table 2. Pinout
Pin #
1
2,5,7,8
3
4
6
Symbol
V
C
TCXO
PROG
GND
f
o
V
DD
Function
TCXO Control Voltage or Ground
TCXO Programming, DO NOT CONNECT
Electrical and Lid Ground
Output Frequency
Supply Voltage
7
8
1.3±0.1
6
5
4
0.6±0.1
Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com
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Outline Drawing
3.2±0.2
4
3
Recommended Pad Layout
1.0±0.1
2.5±0.2
Frequency
Date Code
1.65
1.25
1
2
2.60
1.0 max
1
2
0.65
Package drawing for the ±0.5ppm over -30/80°C and <±2ppm over -40/85°C stability options
Table 3. Pinout
Pin #
0.85
4
3
Symbol
V
C
GND
f
o
V
DD
Function
TCXO Control Voltage or Ground
Electrical and Lid Ground
Output Frequency
Supply Voltage
1
2
0.55±0.1
1.95
3
4
VCXO Function
S
VCXO Feature:
The VT-820 can be ordered with a VCXO function for applications were it will be used in a PLL, or the output
frequency needs fine tune or calibration adjustments. This is a high impedance input , 500KMohm, 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 device.
“No Adjust” Option:
In applications were the VT-820 will not be used in a PLL , or the output frequency does not need fine tune
adjustments, the best device to use would be a VT-820-xxx-xxx0. By using the “no adjust” option, the circuit is simplified as Vc
does not need to be 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 an RF signal or power supply voltage.
Maximum Ratings
S
Absolute Maximum Ratings and Handling Precautions
Stresses in excess of the absolute maximum ratings can permanently damage the device. Functional operation is not implied
or any other 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.
Although ESD protection circuitry has been designed into the VT-820, proper precautions should be taken when handling
and mounting, VI employs a Human Body Model and Charged Device Model for ESD susceptibility testing and design
evaluation.
ESD thresholds are dependent on the circuit parameters used to define the model. Although no industry standard has been
adopted for the CDM a standard resistance of 1.5kOhms and capacitance of 100pF is widely used and therefor can be used for
comparison purposes.
Table 4. Maximum Ratings
Parameter
Storage Temperature
Supply Voltage
Control Voltage
ESD, Human Body Model
ESD, Charged Device Model
Symbol
T
STORE
V
DD
V
C
Rating
-40/85
6
0/V
DD
1000
1000
Unit
ºC
V
V
V
V
Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com
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Table 5. Environmental Compliance
Parameter
Mechanical Shock
Mechanical Vibration
Temperature Cycle
Solderability
Fine and
Gross Leak
Resistance to Solvents
Moisture
Sensitivity Level
Contact Pads
Condition
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
MSL1
Gold over Nickel
The
Reliability
IR Reflow
S
Suggested IR Profile
Devices are built using lead free epoxy and can be subjected to standard lead free IR reflow conditions shown in Table 5. Contact
pads are gold over nickel and lower maximum temperatures can also be used, such as 220C.
Table 6. Reflow Profile
Parameter
PreHeat Time
Ts-min
Ts-max
Ramp Up
Time above 217C
Time to Peak Temperature
Time
at
260C
Time at 240C
Symbol
t
s
Value
200 sec Max
150°C
200°C
3ºC/sec Max
150 sec Max
480 sec Max
10 sec Max
60 sec Max
R
UP
t
L
t
25C to peak
t
P
t
P2
Tape & Reel
Table 7. Tape and Reel Information
Tape Dimensions (mm)
W
18
F
1.75
Do
1.55
Po
4
P1
4
A
178
B
2.5
Reel Dimensions (mm)
C
13
D
22
N
60
W1
11.5
W2
15
#/Reel
1000
Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com
Page4
Table 8. Standard Frequencies (MHz)
8.1920
15.000
19.200
25.000
39.000
10.000
16.000
19.392658
26.000
40.000
10.250
16.3670
19.440
27.000
41.4720
12.000
16.366667
19.6608
27.4560
45.000
12.800
16.367667
19.680
30.150
13.000
16.367673
20.000
30.400
13.568
16.368
20.7360
30.720
14.000
16.369
22.000
31.7967590
14.7456
16.736
23.104
37.800
15.360
16.800
24.5535
38.400
Ordering Information
VT-820- E F G - 206 A- xxMxxxxxxx
Frequency in MHz
Product
TCXO
Package
2.5x3.2
Voltage Options,
E: +3.3 Vdc ±5%,
F: +3.0 Vdc ±5%
G: +2.8 Vdc ±5%
Output
F: Clipped Sine Wave
Temp Range
R: 0 /55°C
K: -10/60°C
J: -20/70°C
G: -30/80°C
H: -30/85°C
E: -40/85°C
Tuning
0: Fixed, No tuning
A: ±5ppm
B: ±8ppm
C: ±10ppm
D: ±12ppm
E: ±15ppm
Stability
507: ±0.5ppm
106: ±1ppm
156: ±1.5ppm
206: ±2.0ppm
256: ±2.5ppm
306: ±3.0ppm
356: ±3.5ppm
406: ±4.0ppm
506: ±5.0ppm
*Note: not all combination of options are available.
Other specifications may be available upon request.
Example: VT-820-EFG-206A-19M200000
For Additional Information, Please Contact
USA:
Vectron International
267 Lowell Road
Hudson, NH 03051
Tel: 1.888.328.7661
Fax: 1.888.329.8328
Europe:
Vectron International
Landstrasse, D-74924
Neckarbischofsheim, Germany
Tel: +49 (0) 3328.4784.17
Fax: +49 (0) 3328.4784.30
Asia:
Vectron International
1F-2F, No 8 Workshop, No 308 Fenju Road
WaiGaoQiao Free Trade Zone
Pudong, Shanghai, China 200131
Tel: 86.21.5048.0777
Fax: 86.21.5048.1881
Disclaimer
Vectron International reserves the right to make changes to the product(s) and or information contained herein without notice. No liability is assumed as a result of their use or application.
No rights under any patent accompany the sale of any such product(s) or information.
Rev: 12/07/2008
Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com
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