VX-705
Voltage Controlled Crystal Oscillator
Previous Vectron Model VC-705/C5250
VX-705
Description
Vectron’s VX-705 Voltage Controlled Crystal Oscillator (VCXO) is a quartz stabilized square wave generator that can be ordered either with a
CMOS output or complementary LVPECL outputs. The VX-705 uses fundamental crystals resulting in low jitter performance and a monolithic IC
which improves reliability and
reduces cost.
Features
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•
•
•
•
CMOS or LVPECL output VCXO
Output Frequencies from 77.76 MHz to 160 MHz
3.3 V Operation
Fundamental Crystal Design with Low Jitter Performance
Output Disable Feature
Excellent ±20 ppm Temperature Stability,
0/70°C, -20/70°C or -40/85°C Operating Temperature
Small Industry Standard Package, 5.0x7.0x1.8mm
Product is free of lead and compliant to EC RoHS Directive
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Applications
SONET/SDH/DWDM
Ethernet, SyncE, GE
xDSL, PCMIA
Digital Video
Broadband Access
Base Stations, Picocells
Block Diagram
V
DD
NC
Output
Crystal
Oscillator
V
C
E/D
Gnd
Rev: 5/12/2011
Figure 1. Block Diagram
Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com
Page1
Performance Specifications
Performance Specifications
Table 1. Electrical Performance - 3.3V CMOS
Parameter
Voltage
1
Current
2
Nominal Frequency
3
Absolute Pull Range
2,6
,
ordering option
Linearity
2
Gain Transfer
2
Temperature Stability
Output Logic Levels
2
Output Logic High
Output Logic Low
Load
Rise Time
2,4
Fall Time
2,4
Symmetry
2
Jitter, RMS
5,7
(12kHz to 20 MHz)
Phase Noise
8
(122.88 MHz)
10Hz
100Hz
1kHz
10kHz
100kHz
1MHz
10MHz
Control Voltage
Control Voltage Range for Pull Range
Control Voltage Input Impedance
Control Voltage Modulation BW
Output Enable/Disable
9
Output Enabled
Output Disabled
Start-Up Time
Operating Temp, Ordering Option
Package Size
1]
2]
3]
4]
5]
6]
7]
8]
9]
Symbol
V
DD
I
DD
Min
Supply
3.135
Frequency
Typical
3.3
Maximum
3.465
40
Units
V
mA
MHz
ppm
%
ppm/V
ppm
V
f
N
APR
Lin
K
V
f
STAB
77.76
±50, ±80
5
+80
±20
Outputs
160.00
V
OH
V
OL
I
OUT
t
R
t
F
SYM
фJ
0.9*V
DD
0.1*V
DD
15
5
5
45
50
80
-66
-98
-124
-138
-151
-158
-161
55
200
pF
ns
ns
%
fsec
dBc/Hz
V
C
Z
IN
BW
V
IH
V
IL
T
S
T
OP
0.3
100
10
0.9*V
DD
3.0
V
KΩ
kHz
V
0.1*V
DD
10
0/70, -20/70, -20/85, or -40/85
5.0 x 7.0 x 1.8
ms
°C
mm
The power supply should have by-pass capacitors as close to the supply and to ground as possible, for examples 0.1 and 0.01uF
Parameters are tested with production test circuit as shown in Figure 2.
See Standard Frequencies and Ordering Information tables for more specific information
Measured from 20% to 80% of a full output swing as shown in Figure 4.
Not tested in production, guaranteed by design, verified at qualification.
Tested with Vc = 0.3V to 3.0V unless otherwise stated in part description
Broadband Period Jitter measured using Wavecrest SIA3300C, 90K samples.
Phase Noise is measured with an Agilent E5052A.
The Output is Enabled if the Enable/Disable is left open.
Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com
Page2
Rev: 5/12/2011
Performance Specifications
Table 2. Electrical Performance - 3.3V LVPECL
Parameter
Voltage
1
Current
2
Nominal Frequency
3
Absolute Pull Range
2,6
,
ordering option
Linearity
2
Gain Transfer
2
Temperature Stability
Output Logic Levels
2
Output Logic High
Output Logic Low
Rise Time
2,4
Fall Time
2,4
Symmetry
2
Jitter, RMS
5,8
(12kHz to 20 MHz)
Jitter, RMS
5,8
(10kHz to 1MHz)
Phase Noise
8
10Hz
100Hz
1kHz
10kHz
100kHz
1MHz
10MHz
Control Voltage
Control Voltage Range for Pull Range
Control Voltage Input Impedance
Control Voltage Modulation BW
Output Enable/Disable
9
Output Enabled, Option A
Output Disabled, Option A
Start-Up Time
Operating Temp, Ordering Option
Package Size
1]
2]
3]
4]
5]
6]
7]
8]
9]
Symbol
V
DD
I
DD
Min
Supply
3.135
Frequency
Typical
3.3
Maximum
3.465
90
Units
V
mA
MHz
ppm
%
ppm/V
ppm
V
f
N
APR
Lin
K
V
f
STAB
77.76
±50, ±80
5
+80
±20
Outputs
160.00
V
OH
V
OL
t
R
t
F
SYM
фJ
фJ
V
DD
-1.025
V
DD
-1.810
V
DD
-0.950
V
DD
-1.700
V
DD
-0.880
V
DD
-1.620
1
1
ns
ns
%
ps
ps
dBc/Hz
45
50
0.3
55
1
0.3
-60
-93
-118
-131
-145
-149
-151
V
C
Z
IN
BW
V
IH
V
IL
T
S
T
OP
5.0 x 7.0 x 1.8
0.3
10
10
0.9*V
DD
0.1*V
DD
10
0/70, -20/70, -20/85, or -40/85
ms
°C
mm
3.0
V
MΩ
kHz
V
The power supply should have by-pass capacitors as close to the supply and to ground as possible, for examples 0.1 and 0.01uF
Parameters are tested with production test circuit below as shown in Figure 3.
See Standard Frequencies and Ordering Information tables for more specific information
Measured from 20% to 80% of a full output swing as shown in Figure 4.
Not tested in production, guaranteed by design, verified at qualification.
Tested with Vc = 0V to 3.3V unless otherwise stated in part description
Broadband Period Jitter measured using Wavecrest SIA3300C, 90K samples.
Phase Noise is measured with an Agilent E5052A.
The Output is Enabled if the Enable/Disable is left open.
Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com
Page3
Rev: 5/12/2011
Test Circuits
I
DD
6
+
V
DD
-
.1μF
.01μF
I
C
V
C
1
+
-
4
3
15pF
Figure 2. CMOS Test Circuit
Figure 3. LVPECL Test Circuit
Waveform
t
R
0.8*VDD
50%
0.2*VDD
On Time
t
F
Period
Figure 4. Output Waveform
Table 3. Absolute Maximum Ratings
Parameter
Power Supply
Voltage Control Range
Storage Temperature
Soldering Temp/Time
Symbol
V
DD
V
C
TS
T
LS
Ratings
0 to 6
0 to V
CC
-55 to 125
260 / 20
Unit
V
V
°C
°C / sec
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 datasheet. Exposure to absolute maximum
ratings for extended periods may adversely affect device reliability. Permanent damage is also possible if OD or Vc is applied before Vcc.
Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com
Page4
Rev: 5/12/2011
Phase Noise
Gain
VX-705 @ 122.88 MHz
150
120
100
100
50
80
Pull (ppm)
0
0
0.5
1
1.5
Vc (volts)
2
2.5
3
60
-50
Gain (ppm/V)
Pull
Gain
40
-100
-150
20
-200
0
Figure 5. Typical Phase Noise - 122.88 MHz CMOS
Figure 6. Typical Gain - 122.88 MHz CMOS
Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com
Page5
Rev: 5/12/2011
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