PLL PLL502

Preliminary
PLL502-27
Low Phase Noise VCXO (24MHz to 50MHz)
FEATURES
•
•
•
•
•
•
Low phase noise VCXO output for the 24MHz to
50MHz range (-130 dBc at 10kHz offset).
CMOS output.
12 to 25MHz crystal input.
Integrated variable capacitors.
Selectable High Drive (36mA drive capability at
TTL level) or Standard Drive (12mA drive capability at TTL) output.
Wide pull range (+/- 250 ppm).
Low jitter (RMS): 10ps period (1 sigma).
3.3V operation.
Available in 8-Pin TSSOP or SOIC.
Pin-to-Pin compatible with ICS MK3727
DESCRIPTIONS
XIN
1
VDD
2
VIN
3
GND
4
PLL502-27
•
•
•
•
PIN CONFIGURATION
8
XOUT
7
GND (or NC)
6
NC
5
CLK
OUTPUT RANGE
MULTIPLIER
FREQUENCY
RANGE
OUTPUT
BUFFER
x2
24 - 50MHz
CMOS
The PLL502-27 is a low cost, high performance and
low phase noise VCXO, providing less than -130dBc
at 10kHz offset in the 24MHz to 50MHz operating
range. The very low jitter (10 ps RMS period jitter)
makes this chip ideal for applications requiring voltage controlled frequency sources. Input crystal can
range from 12 to 25MHz (fundamental resonant
mode).
BLOCK DIAGRAM
VCO
Divider
Reference
Divider
XIN
XOUT
Phase
Comparator
Charge
Pump
Loop
Filter
VCO
CLK
OE
XTAL
OSC
VARICAP
VIN
47745 Fremont Blvd., Fremont, California 94538 TEL (510) 492-0990 FAX (510) 492-0991
Rev 2/25/03 Page 1
Preliminary
PLL502-27
Low Phase Noise VCXO (24MHz to 50MHz)
PIN DESCRIPTIONS
Name
Number
Type
Description
XIN
1
I
Crystal input pin.
VDD
2
P
+3.3V VDD power supply pin.
VIN
3
I
Frequency control voltage input pin.
GND
4, 7
P
Ground pin (pin 7 is optional).
CLK
5
O
Output clock pin.
N/C
6
-
Not connected.
XOUT
8
I
Crystal output pin.
ELECTRICAL SPECIFICATIONS
1. Absolute Maximum Ratings
PARAMETERS
SYMBOL
MIN.
MAX.
UNITS
V CC
- 0.5
7
V
Input Voltage Range
VI
- 0.5
V CC + 0.5
V
Output Voltage Range
VO
- 0.5
V CC + 0.5
V
260
°C
-65
150
°C
-40
85
°C
Supply Voltage Range
Soldering Temperature
Storage Temperature
TS
Ambient Operating Temperature*
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.
47745 Fremont Blvd., Fremont, California 94538 TEL (510) 492-0990 FAX (510) 492-0991
Rev 2/25/03 Page 2
Preliminary
PLL502-27
Low Phase Noise VCXO (24MHz to 50MHz)
2. AC Electrical Specifications
PARAMETERS
SYMBOL
CONDITIONS
MIN.
Input Crystal Frequency
TYP.
12
Output Clock Rise/Fall Time
(Low Drive)
0.8V ~ 2.0V with 10 pF load
1.15
0.3V ~ 3.0V with 15 pF load
3.7
Output Clock Rise/Fall Time
(High Drive)
0.8V ~ 2.0V with 10 pF load
0.5
0.3V ~ 3.0V with 15 pF load
1.5
Output Clock Duty Cycle
Measured @ 1.4V
45
Short Circuit Current
50
MAX.
UNITS
25
MHz
ns
55
%
mA
±50
3. Voltage Control Crystal Oscillator
PARAMETERS
VCXO Stabilization Time *
VCXO Tuning Range
CLK output pullability
SYMBOL
T VCXOSTB
CONDITIONS
MIN.
From power valid
TYP.
10
F XIN = 12 – 25MHz;
XTAL C 0 /C 1 < 250
0V ≤ VIN ≤ 3.3V
ms
ppm
±250
ppm
165
Pull range linearity
ppm/V
10
VCON pin input impedance
UNITS
500
VCXO Tuning Characteristic
VCON modulation BW
MAX.
%
2000
kΩ
25
kHz
0V ≤ VIN ≤ 3.3V, -3dB
Note: 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
10
ps
(1 sigma – 1000 samples)
at 44MHz, with capacitive
decoupling between VDD
and GND.
Phase Noise relative to carrier
44MHz @100Hz offset
-80
dBc/Hz
Phase Noise relative to carrier
44MHz @1kHz offset
-110
dBc/Hz
Phase Noise relative to carrier
44MHz @10kHz offset
-130
dBc/Hz
Phase Noise relative to carrier
44MHz @100kHz offset
-123
dBc/Hz
Phase Noise relative to carrier
44MHz @1MHz offset
-124
dBc/Hz
RMS Period Jitter
47745 Fremont Blvd., Fremont, California 94538 TEL (510) 492-0990 FAX (510) 492-0991
Rev 2/25/03 Page 3
Preliminary
PLL502-27
Low Phase Noise VCXO (24MHz to 50MHz)
5. DC Specification
PARAMETERS
SYMBOL
Supply Current, Dynamic,
with Loaded Outputs
I DD
Operating Voltage
V DD
Output High Voltage
V OH
I OH = -12mA (low drive)
Output Low Voltage
V OL
I LO = 12mA (low drive)
Output High Voltage at
CMOS level
V OHC
I OH = -4mA (low drive)
Output drive current
CONDITIONS
MIN.
F XIN = 12 - 25MHz
Ouput load of 10pF
UNITS
16
20
mA
3.47
V
2.4
V
0.4
V DD – 0.4
V
V
At TTL level (High drive)
36
51
mA
At TTL level (Low drive)
12
17
mA
±50
mA
VCON
ESD Protection
MAX.
3.13
Short Circuit Current
VCXO Control Voltage
TYP.
0
Human Body Model
3.3
V
3000
6. Crystal Specifications
PARAMETERS
Crystal Resonator Frequency
Crystal Loading Capacitance Rating
SYMBOL
MIN.
F XIN
12
C L (xtal)
C0/C1
ESR
TYP.
MAX.
UNITS
25
MHz
9.5
pF
250
-
30
Ω
RS
Note: Crystal Loading rating: 9.5pF 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.
47745 Fremont Blvd., Fremont, California 94538 TEL (510) 492-0990 FAX (510) 492-0991
Rev 2/25/03 Page 4
Preliminary
PLL502-27
Low Phase Noise VCXO (24MHz to 50MHz)
PACKAGE INFORMATION
8 PIN ( dimensions in mm )
TSSOP
Narrow SOIC
Symbol
Min.
Max.
Min.
Max.
A
1.47
1.73
-
1.20
A1
0.10
0.25
0.05
0.15
B
0.33
0.51
0.19
0.30
C
0.19
0.25
0.09
0.20
D
4.80
4.95
2.90
3.10
E
3.80
4.00
4.30
4.50
H
5.80
6.20
6.20
6.60
L
0.38
1.27
0.45
e
H
D
A
0.75
0.65 BSC
1.27 BSC
E
A1
C
L
B
e
ORDERING INFORMATION
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
PLL502-27 X C
PART NUMBER
TEMPERATURATURE
C=COMMERCIAL
M=MILITARY
I=INDUSTRAL
PACKAGE TYPE
S=SOIC, O=TSSOP
PhaseLink Corporation, reserves the right to make changes in its products or specifications, or both at any time without notice. The information furnished 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 express written approval of the President of PhaseLink Corporation.
47745 Fremont Blvd., Fremont, California 94538 TEL (510) 492-0990 FAX (510) 492-0991
Rev 2/25/03 Page 5