Preliminary
PLL500-20
Low Phase Noise VCXO (20MHz to 52MHz)
47745 Fremont Blvd., Fremont, California 94538 TEL (510) 492-0990 FAX (510) 492-0991 Rev 1/07/03 Page 1
FEATURES
VCXO output for the 20MHz to 52MHz range
Low phase noise (-130 dBc @ 10kHz offset at
52MHz).
CMOS output with OE tri-state control.
20 to 52MHz fundamental crystal input.
Integrated high linearity variable capacitors.
12mA drive capability at TTL output.
+/- 150 ppm pull range, max 5% linearity.
Low jitter (RMS): 4ps period jitter.
2.25V to 3.63V DC operation.
Available in die.
DESCRIPTION
The PLL500-20 is a low cost, high performance and
low phase noise VCXO for the 20 to 52MHz range,
providing less than -130dBc at 10kHz offset at
52MHz. The very low jitter (4 ps RMS period jitter)
makes this chip ideal for applications requiring volt-
age controlled frequency sources. Input crystal can
range from 20 to 52MHz (fundamental resonant
mode).
PAD LAYOUT
FREQUENCY RANGE
MULTIPLIER
FREQUENCY
OUTPUT
BUFFER
1x
20 52 MHz
CMOS
BLOCK DIAGRAM
Reference
Divider
XTAL
OSC
XIN
XOUT
CLK
VIN
VARICAP
OE
1
2
3
4
7
6
5
8
Preliminary
PLL500-20
Low Phase Noise VCXO (20MHz to 52MHz)
47745 Fremont Blvd., Fremont, California 94538 TEL (510) 492-0990 FAX (510) 492-0991 Rev 1/07/03 Page 2
PAD DESCRIPTION
Name
Number
Type
Description
XOUT
1
I
Crystal output pin.
OE
2
I
Output Enable input pin. Tri-states output if low. Enables output if high.
VIN
3
I
Frequency control voltage input pin.
GND
4
P
Ground pin.
CLK
5
O
Output clock pin.
VDD
6
P
+3.3V VDD power supply pin.
OE
7
I
Output Enable input pin. Tri-states output if low. Enables output if high.
XIN
8
I
Crystal input pin.
See also pad coordinates table at the end of this document.
ELECTRICAL SPECIFICATIONS
1. Absolute Maximum Ratings
PARAMETERS
SYMBOL
MIN.
MAX.
UNITS
Supply Voltage Range
V
CC
-
0.5
7
V
Input Voltage Range
V
I
-
0.5
V
CC
+
0.5
V
Output Voltage Range
V
O
-
0.5
V
CC
+
0.5
V
Soldering Temperature
260
C
Storage Temperature
T
S
-65
150
C
Ambient Operating Temperature*
-40
85
C
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
conditions 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.
Preliminary
PLL500-20
Low Phase Noise VCXO (20MHz to 52MHz)
47745 Fremont Blvd., Fremont, California 94538 TEL (510) 492-0990 FAX (510) 492-0991 Rev 1/07/03 Page 3
2. AC Electrical Specifications
PARAMETERS
SYMBOL
CONDITIONS
MIN.
TYP.
MAX.
UNITS
Input Crystal Frequency
20
52
MHz
0.8V ~ 2.0V with 10 pF load
1.15
Output Clock Rise/Fall Time
0.3V ~ 3.0V with 15 pF load
3.7
ns
Output Clock Duty Cycle
Measured @ 1.4V
45
50
55
%
Short Circuit Current
50
mA
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
= 20 52MHz;
XTAL C
0
/C
1
< 250
300
ppm
CLK output pullability
0V
VIN
3.3V
150
ppm
VCXO Tuning Characteristic
100
ppm/V
Pull range linearity
5
%
Power Supply Rejection
PWSRR
Frequency change with
Vdd varied +/- 10%
tbd
ppm
VIN pin input impedance
1000
k
VIN modulation BW
0V
VIN
3.3V, -3dB
45
kHz
Note:
Preliminary Specifications still to be characterized. Parameters denoted with an asterisk (*) represent nominal characterization data and are not
production tested to any specific limits.
4. Jitter and Phase Noise specification
PARAMETERS
CONDITIONS
MIN.
TYP.
MAX. UNITS
RMS Period Jitter
(1 sigma 1000 samples)
with capacitive decoupling
between VDD and GND.
4
ps
Phase Noise relative to carrier
52MHz @100Hz offset
-80
dBc/Hz
Phase Noise relative to carrier
52MHz @1kHz offset
-110
dBc/Hz
Phase Noise relative to carrier
52MHz @10kHz offset
-130
dBc/Hz
Phase Noise relative to carrier
52MHz @100kHz offset
-138
dBc/Hz
Phase Noise relative to carrier
52MHz @1MHz offset
-145
dBc/Hz
Note:
Preliminary Specifications still to be characterized.
Preliminary
PLL500-20
Low Phase Noise VCXO (20MHz to 52MHz)
47745 Fremont Blvd., Fremont, California 94538 TEL (510) 492-0990 FAX (510) 492-0991 Rev 1/07/03 Page 4
5. DC Specification
PARAMETERS
SYMBOL
CONDITIONS
MIN.
TYP.
MAX. UNITS
Supply Current, Dynamic,
with Loaded Outputs
I
DD
F
XIN
= 52MHz
Ouput load of 15pF
7
10
mA
Operating Voltage
V
DD
2.25
3.63
V
Output High Voltage
V
OH
I
OH
= -12mA
2.4
V
Output Low Voltage
V
OL
I
LO
= 12mA
0.4
V
Output High Voltage at
CMOS level
V
OHC
I
OH
= -4mA
V
DD
0.4
V
Output drive current
At TTL level
12
17
mA
Short Circuit Current
50
mA
VCXO Control Voltage
VIN
0
3.3
V
ESD Protection
Human Body Model
3000
6. Crystal Specifications
PARAMETERS
SYMBOL
MIN.
TYP.
MAX.
UNITS
Crystal Resonator Frequency
F
XIN
20
52
MHz
Crystal Loading Rating (VIN = 1.65V)
C
L
(xtal)
14
pF
Drive Level
500
W
C0
5
pF
C0/C1
250
-
ESR
R
S
30
Note
: The crystal must be such that it oscillates (parallel resonant) at nominal frequency when presented a C Load as specified above.
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
PLL500-20
Low Phase Noise VCXO (20MHz to 52MHz)
47745 Fremont Blvd., Fremont, California 94538 TEL (510) 492-0990 FAX (510) 492-0991 Rev 1/07/03 Page 5
PAD ASSIGNMENT
Pad #
Name
X (
m)
Y (
m)
1
XOUT
TBD
TBD
2
VIN
TBD
TBD
3
OE
TBD
TBD
4
GND
TBD
TBD
5
CLK
TBD
TBD
6
VDD
TBD
TBD
7
OE
TBD
TBD
8
XIN
TBD
TBD
Die dimensions and reference coordinates in
m excluding scribe lines:
Lower left: X=0, Y=0
Upper right: X=812, Y=986
ORDERING INFORMATION
PhaseLink Corporation, reserves the right to make changes in its products or specifications, or both at any time without notice. The information fur-
nished by Phaselink is believed to be accurate and reliable. However, PhaseLink makes no guarantee or warranty concerning the accuracy of said
information and shall not be responsible for any loss or damage of whatever nature resulting from the use of, or reliance upon this product.
LIFE SUPPORT POLICY
: PhaseLink's products are not authorized for use as critical components in life support devices or systems without the ex-
press written approval of the President of PhaseLink Corporation.
For part ordering, please contact our Sales Department:
47745 Fremont Blvd., Fremont, CA 94538, USA
Tel: (510) 492-0990 Fax: (510) 492-0991
PART NUMBER
The order number for this device is a combination of the following:
Device number, Package type and Operating temperature range
PLL500-20 D C
PART NUMBER
TEMPERATURATURE
C=COMMERCIAL
M=MILITARY
I=INDUSTRAL
PACKAGE TYPE
D=Die
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