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Электронный компонент: PLL502-67SQI

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Preliminary
PLL502-67
4 Outputs 12.5MHz 200MHz Low Phase Noise Multiplier VCXO
47745 Fremont Blvd., Fremont, California 94538 TEL (510) 492-0990 FAX (510) 492-0991 Rev 02/20/03 Page 1
FEATURES
Selectable 12.5MHz to 200MHz range.
Low phase noise output (@ 10kHz frequency
offset, -140dBc/Hz for 17.664MHz, -132dBc/Hz
for 35.328MHz, -125dBc/Hz for 155.52MHz).
4 CMOS outputs (in phase).
12 to 25MHz crystal input.
No external load capacitor or varicap required.
Wide pull range (+/-190 ppm)
Selectable 1/2 to 8x frequency multiplier.
3.3V operation.
Available in 14-SOP.
DESCRIPTIONS
The PLL502-67 is high performance and low phase
noise VCXO IC chip. It provides phase noise per-
formance as low as 140dBc at 1kHz offset (at
17.664MHz) and 125dBc at 1kHz offset at
155.52MHz by multiplying the input crystal frequency
up to 8x. The wide pull range (+/- 190 ppm) and very
low jitter makes this chip ideal for a wide range of
applications, from xDSL to SONET/SDH and FEC.
The chip accepts a low cost fundamental parallel
resonant mode crystal from 12 to 25MHz.
BLOCK DIAGRAM
PIN CONFIGURATION
(Top View)
^: Internal pull-up
PLL 502-67
1
2
3
4
5
6
7
VDD
8
9
10
11
12
13
14
XIN
XOUT
SEL2^
SEL1^
VCON
GND
SEL0^
CLK4
CLK3
VDD
CLK2
CLK1
GND
XIN
XOUT
CLK3
PLL502-67
VCON
CLK4
PLL by-pass
SEL
PLL
(Phase
Locked
Loop)
Oscillator
Amplifier
w/
integrated
varicaps
CLK1
CLK2
Preliminary
PLL502-67
4 Outputs 12.5MHz 200MHz Low Phase Noise Multiplier VCXO
47745 Fremont Blvd., Fremont, California 94538 TEL (510) 492-0990 FAX (510) 492-0991 Rev 02/20/03 Page 2
FREQUENCY SELECTION TABLE
SEL2
SEL1
SEL0
Selected Multiplier
0
0
0
Reserved
0
0
1
Reserved
0
1
0
Reserved
0
1
1
Fin x 2
1
0
0
Fin / 2
1
0
1
Fin x 4
1
1
0
Fin x 8
1
1
1
No multiplication
Note:
Internal pull-ups default SEL2, SEL1 and SEL0 to `1' if not connected
PIN DESCRIPTIONS
Name
Pin number
Type
Description
XIN
2
I
Crystal in connector.
XOUT
3
I
Crystal out connector.
VCON
6
I
Frequency control input (0.3V to 3.0V)
GND
7,8
P
GND.
CLK1, CLK2
9,10
O
Output signal
CLK3, CLK4
12,13
O
Output signal.
SEL2
4
I
SEL1
5
I
SEL0
14
I
Multiplier selector pins. These pins have an internal pull-up
that will default SEL to `1' when not connected to GND.
VDD
1, 11
P
+3.3V VDD.
Preliminary
PLL502-67
4 Outputs 12.5MHz 200MHz Low Phase Noise Multiplier VCXO
47745 Fremont Blvd., Fremont, California 94538 TEL (510) 492-0990 FAX (510) 492-0991 Rev 02/20/03 Page 3
ELECTRICAL SPECIFICATIONS
1. Absolute Maximum Ratings
PARAMETERS
SYMBOL
MIN.
MAX.
UNITS
Supply Voltage
V
DD
7
V
Input Voltage, dc
V
I
V
SS
-
0.5
V
DD
+
0.5
V
Output Voltage, dc
V
O
V
SS
-
0.5
V
DD
+
0.5
V
Storage Temperature
T
S
-65
150
C
Ambient Operating Temperature*
T
A
-40
85
C
Junction Temperature
T
J
125
C
Lead Temperature (soldering, 10s)
260
C
Input Static Discharge Voltage Protection
2
kV
Exposure of the device under conditions beyond the limits specified by Maximum Ratings for extended periods may cause permanent damage to the
device and affect product reliability. These conditions represent a stress rating only, and functional operations of the device at these or any other con-
ditions above the operational limits noted in this specification is not implied.
* Note: Operating Temperature is guaranteed by design for all parts (COMMERCIAL and INDUSTRIAL), but tested for INDUSTRIAL grade only.
2. Crystal Specifications
PARAMETERS
SYMBOL
CONDITIONS
MIN.
TYP.
MAX.
UNITS
Crystal Resonator Frequency
F
XIN
Parallel Fundamental Mode
12
25
MHz
Crystal Loading Rating
C
L
(xtal)
At VCON = 1.65V
9
pF
Crystal Pullability
C
0
/C
1
(xtal)
AT cut
250
-
Recommended ESR
R
E
AT cut
30
Note
: Crystal Loading rating: 9pF is the loading the crystal sees from the VCXO chip at VCON = 1.65V. It is assumed that the crystal will be at nominal
frequency at this load. If the crystal requires more load to be at nominal frequency, the additional load must be added externally. This however may
reduce the pull range.
Preliminary
PLL502-67
4 Outputs 12.5MHz 200MHz Low Phase Noise Multiplier VCXO
47745 Fremont Blvd., Fremont, California 94538 TEL (510) 492-0990 FAX (510) 492-0991 Rev 02/20/03 Page 4
3. Voltage Control Crystal Oscillator
PARAMETERS
SYMBOL
CONDITIONS
MIN.
TYP.
MAX.
UNITS
VCXO Stabilization Time *
T
VCXOSTB
From power valid
10
ms
VCXO Tuning Range
F
XIN
= 12 -
25
MHz;
XTAL C
0
/C
1
< 250
380
ppm
CLK output pullability
0V
VCON
3.3V
190
ppm
Linearity
5
10
%
VCXO Tuning Characteristic
150
ppm/V
VCON input impedance
2000
k
VCON modulation BW
0V
VCON
3.3V, -3dB
25
kHz
Note:
Parameters denoted with an asterisk (*) represent nominal characterization data and are not production tested to any specific limits.
4. General Electrical Specifications
PARAMETERS SYMBOL
CONDITIONS
MIN.
TYP.
MAX.
UNITS
Fout = 17.664MHz
15
30
Fout = 35.328MHz
42
60
Supply Current,
Dynamic (with
Loaded Outputs)
I
DD
4 outputs loaded
at 18pF
Fout < 141MHz
71
80
mA
Operating Voltage
V
DD
3.13
3.47
V
Short Circuit Current
50
mA
5. AC Electrical Specifications
PARAMETERS
SYMBOL
CONDITIONS
MIN.
TYP.
MAX.
UNITS
Input Crystal Frequency
12
25
MHz
0.8V ~ 2.0V with 10 pF load
1.5
Output Clock Rise Time
0.3V ~ 3.0V with 15 pF load
2
5
2.0V ~ 0.8V with 10 pF load
1.5
Output Clock Fall Time
3.0V ~ 0.3V with 15pF load
2
5
ns
Output Clock Duty Cycle
Measured @ 1.4V
45
50
55
%
Short Circuit Current
50
mA
Preliminary
PLL502-67
4 Outputs 12.5MHz 200MHz Low Phase Noise Multiplier VCXO
47745 Fremont Blvd., Fremont, California 94538 TEL (510) 492-0990 FAX (510) 492-0991 Rev 02/20/03 Page 5
6. Jitter specifications
PARAMETERS
CONDITIONS
FREQUENCY
MIN.
TYP. MAX.
UNITS
17.664MHz
2.5
5
35.328MHz
4
7
Period jitter RMS
With capacitive decoupling between
VDD and GND.
155.52MHz
4.5
9
ps
Peak to Peak jitter
With capacitive decoupling between
VDD and GND. Over 10,000 cycles.
155.52MHz
30
60
ps
Integrated jitter RMS
Integrated 12 kHz to 20 MHz
155.52MHz
2.5
4
ps
7. Phase noise specifications
PARAMETERS
FREQUENCY
@10Hz
@100Hz @1kHz @10kHz @100kHz UNITS
17.664MHz
-60
-90
-112
-140
-150
70.656MHz
-60
-90
-112
-127
-125
Phase Noise relative to
carrier
155.52MHz
-60
-90
-112
-125
-123
dBc/Hz
Note: Phase Noise measured at VCON = 0V