VS-720
Voltage Controlled SAW Oscillator
VS-720
Description
The VS-720 is a Voltage Controlled SAW Oscillator that achieves low phase noise and very low jitter performance.
The VS-720 is housed in an industry standard 6-Pad leadless ceramic package that is hermetically sealed. Packaging options
include bulk or tape and reel.
Features
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Industry Standard Package, 5.0 x 7.5 x 2.0 mm
ASIC Technology For Ultra Low Jitter
0.100 ps-rms typical across 12 kHz to 20 MHz BW
0.120 ps-rms typical across 50 kHz to 80 MHz BW
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Output Frequencies from 150 MHz to 1 GHz
3.3 V Operation
LV-PECL or LVDS Configuration with Fast Transition Times
Up to ± 100 ppm APR
Complementary Outputs
Output Disable Feature
Improved Temperature Stability over Standard VCSO
Product is free of lead and compliant to EC RoHS Directive
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Applications
PLL circuits for clock smoothing and frequency translation
Description
Standard
1-2-4 Gigabit Fibre Channel
10 Gigabit Fibre Channel
10GbE LAN / WAN
OC-192
SONET / SDH
INCITS 352-2002
INCITS 364-2003
IEEE 802.3ae
ITU-T G.709
GR-253-CORE Issue4
Block Diagram
Need A Block Diagram
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Performance Specifications
Electrical Performance
Parameter
Voltage
Current (No Load)
Nominal Frequency
Absolute Pull Range (Ordering Option)
Linearity
Gain Transfer (See pg 5)
Temperature Stability
Mid Level - LVPECL
Swing - LVPECL
Mid Level - LVDS
Swing - LVDS
Current
Rise Time
Fall Time
Symmetry
Jitter (12 kHz - 20 MHz BW) 622.08 MHz
Jitter (50 kHz - 80 MHz BW) 622.08 MHz
Period Jitter, RMS (622.08 MHz)
Period Jitter, Peak - Peak (622.08 MHz)
Spurious Suppression
Control Voltage
Control Voltage Range for APR
Control Voltage Input Impedance
Control Voltage Modulation BW
Operating Temperature
Package Size
V
C
Z
IN
BW
T
OP
0.3
75
50
0/70, -20/70 or -40/85
5.0 x 7.5 x 2.0
3.0
V
KΩ
kHz
°C
mm
2,8
6
6
1,3
I
OUT
t
R
t
F
SYM
фJ
фJ
фJ
фJ
45
50
0.100
0.120
3.0
20
-55
Symbol
V
CC
I
CC
Min
Supply
2.97
Frequency
Typical
3.3
55
Maximum
3.63
70
1000
Units
V
mA
MHz
ppm
%
ppm/V
ppm
Notes
2,3
3
1,2,3
1,2,8
2,8
2,8
1
2,3
2,3
2,3
2,3
6
5,6
5,6
2,3
6,7
6,7
9
9
2
f
N
APR
Lin
K
V
f
STAB
150
±100
±10
+90
±20
Outputs
V
CC
-1.4
450
V
CC
-2.4
250
V
CC
-1.25
600
V
CC
-2.3
350
V
CC
-1.0
750
V
CC
-2.5
450
20
500
500
55
0.250
0.300
4.0
30
V
mV-pp
V
mV-pp
mA
ps
ps
%
ps-rms
ps-rms
ps-rms
ps pk-pk
dBc
1]
See Standard Frequencies and Ordering Information tables (Pg 7) for more specific information
2]
Parameters are tested with production test circuit below (Fig 1).
3]
Parameters are tested at ambient temperature with test limits guard-banded for specified operating temperature.
4]
Measured as the maximum deviation from the best straight-line fit, per MIL-0-55310.
5]
Measured from 20% to 80% of a full output swing (Fig 2).
6]
Not tested in production, guaranteed by design, verified at qualification.
7]
Integrated across stated bandwidth per GR-253-CORE Issue4.
8]
Tested with Vc = 0.3V to 3.0V unless otherwise stated in part description
9]
Broadband Period Jitter measured using Lecroy Wavemaster 8600A 6 GHz Oscilloscope, 250K samples taken
10]
±100 ppm APR parts will have linearity of >10%
Fig 1: Test Circuit
t
R
Fig 2: 10K LV-PECL Waveform
t
F
SYM = 100 x t
A
/ t
R
t
A
t
R
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Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com
Absolute Maximum Ratings
Parameter
Power Supply
Output Current
Voltage Control Range
Storage Temperature
Soldering Temp/Time
Symbol
V
CC
I
OUT
V
C
TS
T
LS
Ratings
0 to 4
25
0 to V
CC
-55 to 125
260 / 40
Unit
V
mA
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.
Suggested Output Load Configurations
LV-PECL to LV-PECL:
For short transmission lengths, the power
consumption could be reduced by removing the 100Ω resistor and
doubling the value of the pull down resistors.
LV-PECL to LVDS:
Restricted for short transmission lengths.
Configuration may require modification depending on LVDS receiver.
Functional Test:
Allows standard power supply configuration.
Since AC coupled, the LV-PECL levels cannot be measured.
Production Test:
Allows direct DC coupling into 50Ω measurement
equipment. Must bias the power supplys as shown. Similiar to figure 1.
Page3 of 7
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Typical Characteristics - Gain Transfer
Typical Characteristics - Phase Noise
Page4 of 7
Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com
Reliability
VI qualification includes aging at various extreme temperatures, shock and vibration, temperature cycling, and IR reflow
simulation. The VS-720 family is capable of meeting the following qualification tests:
Environmental Compliance
Parameter
Mechanical Shock
Mechanical Vibration
Solderability
Gross and Fine Leak
Resistance to Solvents
Conditions
MIL-STD-883, Method 2002
MIL-STD-883, Method 2007
MIL-STD-883, Method 2003
MIL-STD-883, Method 1014
MIL-STD-883, Method 2015
Handling Precautions
Although ESD protection circuitry has been designed into the VS-720 proper precautions should be taken when handling and
mounting. VI employs a human body model (HBM) and a charged device model (CDM) for ESD susceptibility testing and design
protection evaluation.
ESD Ratings
Model
Human Body Model
Charged Device Model
Minimum
1500V
500V
Conditions
MIL-STD-883, Method 3015
JESD22-C101
Reflow Profile (IPC/JEDEC J-STD-020C)
Parameter
PreHeat Time
Ramp Up
Time Above 217 °C
Time To Peak Temperature
Time at 260 °C
Ramp Down
Symbol
t
S
R
UP
t
L
T
AMB-P
t
P
R
DN
Value
60 sec Min, 180 sec Max
3 °C/sec Max
60 sec Min, 150 sec Max
480 sec Max
20 sec Min, 40 sec Max
6 °C/sec Max
The device is qualified to meet the JEDEC standard for
Pb-Free assembly. The temperatures and time intervals
listed are based on the Pb-Free small body requirements.
The VS-720 device is hermetically sealed so an aqueous
wash is not an issue.
Termination Plating:
Electroless Gold Plate over Nickel Plate
Page5 of 7
Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com
