VX-705
Voltage Controlled Crystal Oscillator
VX-705
Description
The VX-705 is a Voltage Control Crystal Oscillator that operates at the fundamental frequency of the internal crystal. The crystal is
a high-Q quartz device that enables the circut to achieve low phase jitter performance over a wide operating temperature range.
The VX-705 is housed in an industry standard hermetically sealed LCC package and is available in tape and reel.
Features
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CMOS or LVPECL output VCXO
Output Frequencies from 77.76 MHz to 170 MHz
3.3 V Operation
Fundamental Crystal Design with Low Jitter Performance
Output Disable Feature
Excellent ±20 ppm Temperature Stability,
0/70°C, -20/85°C or -40/85°C Operating Temperature
Small Industry Standard Package, 5.0x7.0
Product is free of lead and compliant to EC RoHS Directive
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LTE
Applications
SONET/SDH/DWDM
Ethernet, SyncE, GE
xDSL, PCMIA
Digital Video
Broadband Access
Base Stations, Picocells
Test and Measurment
Block Diagram
V
DD
COutput or NC Output
Crystal
Oscillator
V
C
E/D or NC
Gnd
Rev: 5/8/2012
Figure 1. Block Diagram
Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com
Page1
Table 1. Electrical Performance - 3.3V CMOS
Parameter
Voltage
1
Current
2
Nominal Frequency
3
Absolute Pull Range
2,6
,
ordering option
Linearity
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
5,8
(122.88 MHz)
10Hz
100Hz
1kHz
10kHz
100kHz
1MHz
10MHz
Performance Speci cations
Performance Speci cations
Symbol
V
DD
I
DD
Frequency
f
N
APR
Lin
f
STAB
Outputs
V
V
OH
V
OL
I
OUT
t
R
t
F
SYM
фJ
45
50
0.08
-66
-98
-124
-138
-151
-158
-161
Control Voltage
V
C
Z
IN
BW
V
IH
V
IL
T
S
T
OP
5.0 x 7.0 x 1.8
0.3
1
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
0.9*V
DD
0.1*V
DD
15
5
5
55
0.2
pF
ns
ns
%
ps
dBc/Hz
80
±50
5
±20
170
MHz
ppm
%
ppm
Min
Supply
3.135
Typical
3.3
10
Maximum
3.465
25
Units
V
mA
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]
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 speci c information
Measured from 20% to 80% of a full output swing as shown in Figure 4.
Not tested in production, guaranteed by design, veri ed at quali cation.
Tested with Vc = 0.3V to 3.0V unless otherwise stated in part description
Broadband Period Jitter measured using Wavecrest SIA3300C, 90K samples, 122.80MHz Output.
Phase Noise is measured with an Agilent E5052A, 122.880MHz Output.
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: 5/8/2012
Performance Speci cations
Table 2. Electrical Performance - 3.3V LVPECL
Parameter
Voltage
1
Current
2
Nominal Frequency
3
Absolute Pull Range
2,6
,
ordering option
Linearity
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)
Phase Noise
5,8
155.52MH
Z
)
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
V
C
Z
IN
BW
V
IH
V
IL
T
S
T
OP
5.0 x 7.0 x 1.8
0.3
1
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
Symbol
V
DD
I
DD
Min
Supply
3.135
Frequency
Typical
3.3
50
Maximum
3.465
90
170
Units
V
mA
MHz
ppm
%
ppm
V
f
N
APR
Lin
f
STAB
77.76
±30, ±50
5
±20
Outputs
10
V
OH
V
OL
t
R
t
F
SYM
фJ
V
DD
-1.025
V
DD
-1.810
V
DD
-0.950
V
DD
-1.700
0.6
0.6
V
DD
-0.880
V
DD
-1.620
1
1
55
0.5
ns
ns
%
ps
dBc/Hz
45
50
0.2
-60
-88
-118
-131
-145
-153
-156
1]
2]
3]
4]
5]
6]
7]
8]
9]
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 speci c information
Measured from 20% to 80% of a full output swing as shown in Figure 4.
Not tested in production, guaranteed by design, veri ed at quali cation.
Tested with Vc = 0V to 3.3V unless otherwise stated in part description
Broadband Period Jitter measured using Wavecrest SIA3300C, 90K samples, 155.250MHz Output.
Phase Noise is measured with an Agilent E5052A, 155.52MHz Output.
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: 5/8/2012
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 a ect 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: 5/8/2012
Phase Noise
Gain
VX-705 CMOS at 122.8800 MHz
200
250
150
200
100
50
Pull (ppm)
150
0
100
-50
-100
50
-150
Pull
Sensitivity
0
-200
0.0
0.3
0.6
0.9
1.2
1.5
1.8
2.1
2.4
2.7
3.0
3.3
Control voltage (volts)
Figure 5A. Typical Phase Noise - 122.88 MHz CMOS
Figure 5B. Typical Gain - 122.88 MHz CMOS
VX-705 LVPECL at 125.0000 MHz
200
250
150
200
100
150
50
0
100
-50
Pull
-100
Sensitivity
0
3.30
50
-150
0.00
0.30
0.60
0.90
1.20
1.50
1.80
2.10
2.40
2.70
3.00
Control voltage (volts)
Figure 6A. Typical Phase Noise - 125.00 MHz CMOS
Figure 6B. Typical Gain - 125.00 MHz LVPECL
Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com
Page5
Rev: 5/8/2012
Sensitivity (ppm/V)
Pull (ppm)
Sensitivity (ppm/V)
嵌入式系统
