VS-500A [VECTRON]
Voltage Controlled Saw Oscillator; 压控振荡器锯
| 型号： | VS-500A |
| 厂家： | 
Vectron International, Inc |
| 描述： | Voltage Controlled Saw Oscillator |
| 文件： | 总8页 (文件大小：393K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Product Data Sheet
VS-500A
Voltage Controlled Saw Oscillator
Features
• Output Frequencies from 155 MHz to 800 MHz
• Low Jitter < 1 ps rms in the 12kHz to 20MHz range
• < 1ps rms jitter in 50kHz to 80MHz range
• 3.3V (see VS-500) or 5.0V operation
• Ideal for clock smoothing, frequency translation, clock
and data retiming applications
• 10K ECL, PECL logic levels with fast transition times
• Complementary outputs
• Low profile, surface mount package
• Output disable feature
Applications
• 2.5, 10 Gbit/s FEC and standard SONET/SDH Clock
Smoothing and Frequency Translation
• 10 Gigabit Ethernet Clock Smoothing
• Frequency Translation
Description
The VS-500A is a SAW based voltage controlled
oscillator that operates at the fundamental frequency of
the internal SAW filter. This resonator is a high-Q quartz
device that enables the circuit to achieve low phase
jitter performance over a wide operating temperature
range. The oscillator is housed in a hermetically sealed
J-lead surface mount package offered on tape and reel.
It has an output disable to facilitate on-board testing.
VS-500A Voltage Controlled SAW Oscillator
Pin Information
Table 1. Pin Function
Pin
Symbol
Function
1
2
3
4
5
6
VC
OD
VCSO Control Voltage
Output Disable
GND
Output
COutput
VCC
Case and electrical ground
VCSO Output
VCSO Complimentary Output
Power Supply Voltage (5.0 V 10ꢀ%
1. By setting OD low, the outputs are disabled and OUT is held high while Complementary OUT is held low. The threshold for Output Disable is 1.4V
above pin 3. Output Disable should not be driven above mid supply and during normal operation, should be left floating (use with an open collector or
3-State gate for interfacing with standard logic%.
Performance Characteristics
°C
Table 2. Electrical Performance @ 25
Parameter
Symbol
Minimum
155
Typical
Maximum
Units
MHz
°C
Center Frequency, see ordering information
Operating Temperature
Supply Current (no load%
Supply Voltage
FN
800
+85
70
TOP
-40
25
55
5
ICC
mA
V
VCC
4.5
50
5.5
-
Absolute Pull Range over -40 to 85°C
(Vc= 0.5 to 4.5%
APR
-
ppm
Positive Gain Transfer @ 155.52MHz
(Frequency vs Control voltage%
KV
KV
-
-
350
200
-
-
ppm/V
ppm/V
Positive Gain Transfer @ 622.080MHz
(Frequency vs Control voltage%
Linearity
Lin
FSTAB
VOL
3
ꢀ
ppm
V
Frequency Stability, -40 to 85 wrt 25°C
Output Level Low1
Output Level High1
150
VCC -1.95
VCC -0.98
-
-
VCC -1.63
VCC -0.75
VOH
V
Output Rise Time2
Output Fall Time2
tR
tF
250
250
0.439
0.276
0.293
-60
400
400
ps
ps
Jitter @ 155.520 MHz, 12 KHz to 20 MHz
Jitter @ 622.080 MHz, 12 KHz to 20 MHz
Jitter @ 622.080 MHz, 50 KHz to 80 MHz
Spurious Suppression
ps, rms
ps, rms
ps, rms
dB
-50
45
8
Data Symmetry
SYM
Zc
49/51
10
55
12
-
ꢀ
Control Voltage Input Impedance
Control Voltage Modulation Bandwidth
Output Current
KΩ
kHz
BW
Iout
-
500
-
-
20
mA
1. Output Levels are standard 10K ECL and are fully 100K ECL compatible.
2. Transition times are measured from 20ꢀ to 80ꢀ of a full 10K ECL level swing.
Table 3. Typical Single Side-Band Phase Noise (dBc/Hz)
Offset from Carrier
100 Hz
1kHz
10kHz
100kHz
-127
VS-500A 622.080
-62
-85
-109
Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • Fax: 1-888-FAX-VECTRON
2
VS-500A Voltage Controlled SAW Oscillator
+5.0V +5.0V
+5.0V
.01uF
.1uF
120
120
Vc
Vcc
(From PLL)
1
2
3
6
5
COutput
Output
OD
(AC Coupling)
Gnd
4
82
82
+5.0V
.01uF
.1uF
Vc
Vcc
(From PLL)
1
2
3
6
5
COutput
Output
OD
(AC Coupling)
Gnd
4
330
330
Note 2: To diasble output, connect Output Disable to ground. To enable output, leave pin 2 floating or open.
Figure 1
PECL Operation
Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • Fax: 1-888-FAX-VECTRON
3
VS-500A Voltage Controlled SAW Oscillator
-5.0V -5.0V
120
120
Vc
Vcc
(From PLL)
0.1uF
1
2
3
6
5
COutput
Output
OD
(AC Coupling)
Gnd
4
.01uF
80
80
-5.0V
Vc
Vcc
(From PLL)
0.1uF
1
2
3
6
5
COutput
Output
OD
(AC Coupling)
Gnd
4
.01uF
330
330
-5.0V
-5.0V -5.0V
Note1: Conductive lid will be @ -5V for ECL configuration
Note 2: To diasble output, connect Output Disable to –5V. To enable output, leave pin 2 floating or open.
Figure 2. ECL Operation
Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • Fax: 1-888-FAX-VECTRON
4
VS-500A Voltage Controlled SAW Oscillator
Absolute Maximum Ratings
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 data sheet. Exposure to absolute maximum ratings for
extended periods may adversely affect device reliability.
Table 4. Absolute Maximum Ratings
Parameter
Power Supply
Symbol
VCC
Iout
Iout
VC
Ratings
0 to 8
Unit
V
mA
mA
V
V
°C
Output Current1
20
50
Output Current2
Voltage Control Range1
Voltage Control Range2
Storage Temperature
Soldering Temp./Time
0 to VCC
-0.5 to VCC+0.5
-55 to 125
220/10
VC
TS
TLS
°C/Seconds
1 Limts beyond which performance can not be guaranteed.
2 Limits beyond which device life may be impaired.
Qualification Conformance
The VS-500A family passes the following Mil-Std qualification.
Table 5. Environmental Compliance
Parameter
Conditions
Mechanical Shock
Mechanical Vibration
Solderability
Gross and Fine Leak
Resistance to Solvents
MIL-STD-883, Method 2002
MIL-STD-883, Method 2007
MIL-STD-883, Method 2003
MIL-STD-883, Method 1014
MIL-STD-883, Method 2016
Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • Fax: 1-888-FAX-VECTRON
5
VS-500A Voltage Controlled SAW Oscillator
Handling Precautions
Although ESD protection circuitry has been designed into the the VS-500A proper precautions should be taken
when handling and mounting. VI employs a human body model and a charged-device model (CDM% for ESD sus-
ceptibility testing and design protection evaluation. ESD thresholds are dependent on the circuit parameters used
to define the model. Although no industry wide standard has been adopted for the CDM, a standard HBM of resis-
tance = 1.5Kohms and capacitance = 100pF is widely used and therefore can be used for comparison purposes.
Table 6. ESD Ratings
Model
Human Body Model
Charged Device Model
Minimum
1500V
1000V
TIME(s)
Figure 5. Suggested IR profile
VI qualification includes aging at various extreme temperatures, shock and vibration, temperature cycling and IR
reflow simulation. The conditions a device can withstand are well understood and devices can be subjected to
the profile in figure 5. This profile shows a ramp up condition to prevent thermal shock, a preheat period in which
the flux is activated, a ramp up to 183°C which is the reflow temperature of Sn/Pb eutectic and a gradual cool
down. The time above 183°C should not exceed 60 seconds and the peak temperature should be no more than
220°C for 10 seconds. The VS-500A’s are 100ꢀ screened for hermiticity so an aqueous wash is not an issue.
Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • Fax: 1-888-FAX-VECTRON
6
VS-500A Voltage Controlled SAW Oscillator
Figure 6. Outline Diagram
Dimensions are in
inches and (millimeters)
0.118
(3.00)
0.050
(1.27)
0.200
(5.08)
0.100
(2.54)
0.346
(8.80)
Figure 7. Suggested Pad Layout
Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • Fax: 1-888-FAX-VECTRON
VS-500A Voltage Controlled SAW Oscillator
J
F
G
D
C
B
A
I
L
E
H
K
Figure 8. Tape Reel Drawing
Table 7. Tape and Reel Dimensions (mm)
Tape Dimensions
Reel Dimensions
# Per Reel
Product
A
B
C
D
E
F
G
H
I
J
K
L
VS-500A
24
11.5
1.5
4
12
1.78
21
13
100
5
25
330 200
Ordering Information
Table 8. Available Frequencies (MHz)
155.520
177.7371
625. 000
669.1281
759.410
156.250
311.040
627.3296
669.3265
765.5906
161.1328
622.080
644.5313
690.5692
767.250
166.6286
624.7048
666.5143
719.7344
777.600
Other frequencies available upon request
For additional information please contact:
USA: Vectron International • 267 Lowell Road, Hudson, NH 03051 . . . . Tel: 1-88-VECTRON-1 • Fax: 1-888-FAX-VECTRON
EUROPE: ......................................................................... Tel: 49 (0) 3328 4784 17 Ô Fax: 49 (0) 3328 4784 30
ASIA: ................................................................. Tel: +86 21 28909740 / 41 / 42 Ô Fax: +86 21 28909240 / 2890999
www.vectron.com
I
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.
© 2001, Vectron International
Printed in USA 2/02
8
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