Data Sheet

VFJA402
Jitter Attenuator with 3 Input Frequency
Selections plus Free Run Mode
RoHS Status
Features
¾
¾
¾
¾
Free Run Mode
8KHz to 200MHz Input Frequency Range
Ultra Low Jitter and Phase Noise: -130dBc/Hz @ 1KHz
Low Power: < 150mW typical
Applications
¾
¾
Synchronous Ethernet
Wireless Infrastructure
Description
The VFJA402 is a jitter attenuator capable of providing an output frequency up to 200MHz. Two select inputs
[S1,S0] allow the user to select 1 of 3 preset input frequencies or the free run mode. In free run mode the
device provides the nominal output frequency and is not phase locked to the input frequency. Operating with a
+3.3 volt power supply the device typically consumes 150mW. The output is configured as a differential
LVPECL signal and requires external termination resistors. The VFJA402 is available in a 19.5mm x 15.5mm
surface mount package.
Filter
F in
S0
S1
Fout
Disable
uController
Vcc
VCXO
PFD
R-Divider
N- Divider
Vccp
.1 uF
Block Diagram
75 South Street, Hopkinton, MA 01748 • 800-982-5737 • 508-435-6831 • FAX 508-435-5289 • www.valpeyfisher.com • RevG0409
1
VFJA402
Jitter Attenuator with 3 Input Frequency
Selections plus Free Run Mode
Absolute Maximum Ratings
Parameter
Symbol
Supply Break
Down Voltage
Storage
Temperature
Vcc
Ts
Condition
Min
Typ
Max
Unit
-0.5
5.5
V
-55
+105°
°C
Note
Electrical Specifications
Parameter
Output
Frequency
Range
Input
Frequency
Range
Input Level
Output Level
Logic “1”
Output Level
Logic “0”
Phase Jitter
SSB Phase
Noise
Symbol
Condition
Min
Typ
Max
Unit
Fout
10
200
MHz
Fin
0.008
200
MHz
See Table 1
0.4
3.3
V p-p
Note 2
Vcc-0.96
Vcc-0.81
V
Vcc-1.85
Vcc-1.65
V
0.5
ps(rms)
Vin
Voh
Vol
Фn
AC coupled internally
50 Ohm to Vcc-2V or
Thevenin Equivalent
12KHz to 20MHz
100Hz
1KHz
10KHz
100KHz
0.20
-100
-130
-145
-150
dBc/Hz
APR
± 32
ppm
Modulation BW
Free run
Accuracy
Duty Cycle
10
Hz
Rise / Fall Time
-40 ºC to +85 ºC
@ 50%
Tr/Tf
45
50
20% to 80%
+/- 35
ppm
55
%
0.6
ns
3
Start up time
Supply Voltage
Vcc
Input Current
Operating
Temperature
Range
Enable /
Disable
Function
Enable /
Disable Time
Icc
Notes:
1.
2.
3.
Note
3.15
Ta
-40°
Note 1
s
3.30
3.45
V
45
55
mA
+85°
°C
Input HIGH (>2.5V): Output Disabled (Fout=”0”; nFout=”1”)
Input LOW (<0.5V) or floating: Output Enabled
Te/Td
@ 155.52MHz
100
LVCMOS
ns
Consult factory for Bandwidth options
For Fin < 20 MHz , ensure SR > 50 V/µs
For best noise immunity use [S1, S0] = [0, 0]
75 South Street, Hopkinton, MA 01748 • 800-982-5737 • 508-435-6831 • FAX 508-435-5289 • www.valpeyfisher.com • RevG0409
2
VFJA402
Jitter Attenuator with 3 Input Frequency
Selections plus Free Run Mode
How to Order
Standard Frequencies
P/N
suffix
-001
-003
-005
-007
(See Table 1)
Suffix
VFJA402
Table 1
S1:S0
Input Frequency
(MHz)
00
01
10
11
Free Run Mode
0.008
19.44
161.1328125
Output
Frequency
(MHz)
156.25
156.25
156.25
156.25
00
01
10
11
Free Run Mode
161.1328125
19.44
125
156.25
156.25
156.25
156.25
00
01
10
11
Free Run Mode
25
100
100
155.52
155.52
155.52
155.52
00
01
10
11
Free Run Mode
161.1328125
19.44
125
125.00
125.00
125.00
125.00
P/N
suffix
-002
-004
Note 3
-006
-008
S1:S0
Input Frequency
(MHz)
Output Frequency
(MHz)
00
01
10
11
Free Run Mode
0.008
19.44
155.52
155.52
155.52
155.52
155.52
00
01
10
11
25
25
25
25
155.52
155.52
155.52
155.52
00
01
10
11
Free Run Mode
25
125
156.25
156.25
156.25
156.25
156.25
00
01
10
11
Free Run Mode
19.20
19.20
19.20
153.60
153.60
153.60
153.60
Once Input and Output frequencies have been submitted and approved, the Factory will assign a part number.
75 South Street, Hopkinton, MA 01748 • 800-982-5737 • 508-435-6831 • FAX 508-435-5289 • www.valpeyfisher.com • RevG0409
3
VFJA402
Jitter Attenuator with 3 Input Frequency
Selections plus Free Run Mode
Environmental and Mechanical
Parameter
Mechanical Shock
Thermal Shock
Specification
Per MIL-STD-202, Method 213, Condition E
Per MIL-STD-883, Method 1011, Condition A
Vibration
Per MIL-STD-883, Method 2007, Condition A
Soldering Conditions
260°C for 10s max
Leak rate less than 5x10-8 atm.cc/s of helium (crystal only)
Hermetic Seal
Mechanical Outline
Connection Diagram
Vcc = 3.3V
C1
.1 uF
Disable
3 4 2 10
Fin
1
12
S1
S0
5
7
11
8 14
R1
180 Ω
Fout
nFout
R2
180 Ω
Gnd
Pin #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Description
Fin
DNC
Vccp
Vcc
S1
DNC
S0
Gnd
N/C
Disable
nFout
Fout
N/C
Gnd
* Connect pin #3 to pin #4 and
add .1 uF
75 South Street, Hopkinton, MA 01748 • 800-982-5737 • 508-435-6831 • FAX 508-435-5289 • www.valpeyfisher.com • RevG0409
4
VFJA402
Jitter Attenuator with 3 Input Frequency
Selections plus Free Run Mode
Recommended Pad Layout
75 South Street, Hopkinton, MA 01748 • 800-982-5737 • 508-435-6831 • FAX 508-435-5289 • www.valpeyfisher.com • RevG0409
5
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