VT-803
Temperature Compensated Crystal Oscillator
VT-803
Description
Vectron’s VT-803 Temperature Compensated Crystal Oscillator (TCXO) is a quartz stabilized, clipped sine wave or CMOS output,
5th order analog temperature compensated oscillator, operating off a 2.8 to 5.0 volt supply in a hermetically sealed 3.2x5 mm
ceramic package.
Features
•
•
•
•
•
•
•
•
Clipped Sine Wave or CMOS Output
10.000-52.000 MHz Output
±100 ppb Temperature Stability
Enable/Disable Function
Optional VCXO
Fundamental Crystal Design
Gold over nickel contact pads
Hermetically Sealed Ceramic SMD package
•
•
•
•
•
•
•
Applications
Femto Cells
Base Stations
IP Networking
GPS
Point to Point Radio
Manpack Radio
Test and Measurement
• Product is compliant to RoHS directive
and fully compatible with lead free assembly
Block Diagram
V
DD
Crystal
Output
Analog
Temperature
Comp.
Vcontrol
Optional
Enable/Disable
Gnd
Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com
Page1
Specifications
Table 1. Electrical Performance, Clipped Sine Wave Option
Parameter
Output Frequency,
1
Ordering Option
Supply Voltage
2
,
Ordering Option
Supply Current, 10-26.000MHz
26.001-52.000MHz
Operating Temperature,
Ordering Option
Stability Over Operating Temperature
3
,
Ordering Option
Initial Accuracy, “No Adjust” Option
4
Power Supply Stability, ±5% change
Load Stability, ±10% change
Aging
Pull Range,
Ordering Option
Control Voltage to reach Pull Range
Control Voltage Impedance
Output Level
Output Load
Phase Noise, 26.000MHz
10Hz
100Hz
1kHz
10kHz
100kHz
Enable/ Disable
5
Output Enabled
Output Disabled
0
N
-91
-117
-136
-150
-158
V
IH
V
IL
0.7*V
DD
0.3*V
DD
2
V
V
ms
V
O
p/p
PR
0.5
100
0.8
10K II 10pF
dBc/Hz
±5, ±8, ±10, ±12
2.5
Symbol
f
O
V
DD
I
DD
T
OP
Min
10
Typ
+2.8, +3.0, +3.3, +5.0
Max
52
2.0
2.6
Units
MHz
V
mA
°C
ppm
ppm
ppm
ppm
ppm/yr
ppm
V
Kohm
V
-10/70, -20/70, -30/85, -40/85
±0.100, ±0.200, ±0.280, ±0.500, ±1.0
±1.0
±0.05
±0.05
±0.5
Start Up Time
t
SU
1. The Output is DC coupled.
2. The VT-803 power supply pin should be filtered, eg, a 10uF, 0.1uF and 0.01uf capacitor.
3. Not all stabilities are available over all temperature ranges, consult Table 9.
4. After 2 IR reflows and 24 hours.
5. The output is enabled if the E/D is left floating.
Outline Drawing
Table 2. Pinout
Pin #
Frequency
Date Code
1
2
3
4
Dimensions in
mm
#3
Symbol
V
C
NC
NC
GND
OUT
E/D
NC
V
DD
Function
TCXO Control Voltage or NC
Make No Connection
Make No Connection
Ground
Output
Enable Disable
Make No Connection
Supply Voltage
5
6
7
8
Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com
Page2
Specifications
Table 3. Electrical Performance, CMOS Option
Parameter
Output Frequency
1
,
Ordering Option
Supply Voltage
2
,
Ordering Option
Supply Current, 10-26MHz
26.001-40.000MHz
40.001- 52.000MHz
Operating Temperature,
Ordering Option
Stability Over Operating Temperature
3
,
Ordering Option
Initial Accuracy, “No Adjust” Option
3
Power Supply Stability, ±5% change
Load Stability, ±10% change
Aging
Pull Range,
Ordering Option
Control Voltage to reach Pull Range
Control Voltage Impedance
Output Level
Output Logic High
Output Logic Low
Output Logic High Drive
Output Logic Low Drive
Output Load
Phase Noise, 26.000MHz
10Hz
100Hz
1kHz
10kHz
100kHz
Period Jitter
5
rms
peak-peak
Enable/ Disable
6
Output Enabled
Output Disabled
Start Up Time
V
IH
V
IL
t
SU
0
N
-91
-117
-139
-153
-157
2.5
21.0
0.7*V
DD
0.3*V
DD
2
ps
ps
V
V
ms
V
OH
V
OL
I
OH
I
OL
PR
0.5
100
0.9*V
DD
0.1*V
DD
-4
4
15
±5, ±8, ±10, ±12
2.5
Symbol
f
O
V
DD
I
DD
Min
10
Typ
+2.8, +3.0, +3.3, +5.0
Max
52
3.5
5
6
Units
MHz
V
mA
T
OP
-10/70, -20/70, -30/85, -40/85
±0.100, ±0.200 ±0.280 ±0.500, ±1.0, ±2.0
±1.0
±0.05
±0.05
±0.5
°C
ppm
ppm
ppm
ppm
ppm/yr
ppm
V
Kohm
V
V
mA
mA
pF
dBc/Hz
1. The Output is DC coupled.
2. The VT-803 power supply pin should be filtered, eg, a 10uF, 0.1uF and 0.01uf capacitor.
3. Not all stabilities are available over all temperatures, consult Table 10.
4. After 2 IR reflows and 24 hours.
5. Measured using a Wavecrest SIA3300C, 90K samples.
6. The output is enabled if the E/D is left floating.
Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com
Page3
Warm Up Time
80.0
70.0
Frequency versus Vc Over Temperature
VcSlope Over Temperature
15.00
10.00
5.00
CMOS
Clipped Sinewave
60.0
50.0
-40C
+25C
+85C
ppm
ppb
40.0
0.00
-5.00
-10.00
30.0
20.0
10.0
-15.00
0.00
0.75
1.50
2.25
Control Voltage
3.00
0.0
40
50
60
70
80
10
20
30
90
0
11
10
0
12
0
Seconds
Figure 1
The VT-803 start up time is rated at 2ms. Figure 1 shows the Output
Frequency versus time in seconds which shows the output reaching a
steady state frequency within 60 seconds.
Figure 2
The VT-803 output frequency change versus control voltage is very linear
and Figure 2 show the typical performance over temperature.
Allan Deviation, Clipped Sine Wave Output
Allan Deviation, CMOS Output
Figure 3
Test Conditions are under room ambient air flow (non insulated
conditions).
Figure 4
Test Conditions are under room ambient air flow (non insulated
conditions).
Aging
AGING: VT-803-0001 S/N:7 ID:UNUSED [.09
PPB/Day]-ELEVATED1(00-0031) 05/16/11
150
Delta 1 Second Frequency
Frequency (PPB)
100
:
50
0
0
20
40
Time (Days)
60
80
100
Figure 5
Figure 5 shows an output frequency change of 125ppb typical over 85
days at 85°C which would be equivalent to 125ppb over 2.25 years at
40°C.
Page4
Figure 6
Figure 6 is a plot of the change in frequency, in ppm, between
1 second readings for 10K data points.
Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com
Temperature Stability Graph
0.5
0.4
0.3
0.2
0.1
ppm
0
-0.1 -10
-0.2
-0.3
-0.4
-0.5
-0.15
-0.2
delta ppm
0.05
0
0.2
0.15
0.1
Delta Frequency vs. Temperature
0
10
20
30
40
50
60
70
-10
0
10
20
30
40
50
60
70
-0.05
-0.1
Temperature
Temperature C
°C
Temperature °C
Figure 7
Figure 8
Figure 8 shows the change in frequency reading between every adjacent
2°C readings.
Phase Noise Performance, Clipped Sine Wave
Phase Noise Performance, CMOS
Figure 9
Figure 10
Phase Noise Over Temperature
-50.00
-60.00
-70.00
-80.00
-90.00
-100.00
dBc/Div
-110.00
-120.00
-130.00
-140.00
-150.00
-160.00
-40C, 1.75dB better than 25C
Phase Noise Over Power Supply Variation
-50.0
-60.0
-70.0
-80.0
-90.0
-100.0
dBc/Div
-110.0
-120.0
-130.0
-140.0
85C, 1.75 dB higher than 25C
25C
-150.0
-160.0
-170.0
-170.00
1
10
100
1000
Hertz
10000
100000
1000000
10000000
1
10
100
1000
Hertz
10000
100000
1000000
10000000
Figure 11
Figure 11 shows the difference in the phase noise at 85°C, 25°C and -40°C.
Figure 12
Figure 12 is a phase noise plot at a 2.8, 3.0, 3.3 and 3.6 volt power supply
which demonstrates there is no significant change in performance.
Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com
Page5
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