(Preliminary)
PL580-37/38/39
38MHz-320MHz Low Phase Noise VCXO
FEATURES
•
•
•
Less than 0.4ps RMS (12KHz-20MHz) phase
jitter for
all frequencies
.
Less than 25ps (typ.) peak to peak jitter for all
frequencies.
Low phase noise output (@ 1MHz frequency
offset
∗
-144dBc/Hz for 155.52MHz
∗
-140dBC/Hz for 311.04MHz
19MHz-40MHz crystal input.
38MHz-320MHz output.
Available in PECL, LVDS, or CMOS outputs.
No external varicap required.
Output Enable selector.
Wide pull range (+/-200ppm).
3.3V operation.
Available in 3x3 QFN or 16-pin TSSOP
packages.
PACKAGE PIN ASSIGNMENT
VDDANA
XIN
XOUT
SEL2^
OE_CTRL
VCON
GNDANA
LP
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
SEL0^
SEL1^
GNDBUF
QBAR
VDDBUF
Q
GNDBUF
LM
PL580-3X
•
•
•
•
•
•
•
•
16-pin TSSOP
VDDANA
SEL0^
10
XOUT
12
13
14
15
16
1
11
SEL1^
9
XIN
8
7
6
GNDBUF
QBAR
VDDBUF
Q
DESCRIPTION
The PL580-3X is a monolithic low jitter and low
phase noise VCXO, capable of 0.4ps RMS phase
jitter and CMOS, LVDS, or PECL outputs, covering a
wide frequency output range up to 320MHz. It allows
the control of the output frequency with an input
voltage (VCON), using a low cost crystal.
The frequency selector pads of PL580-3X enable
output frequencies of (2, 4, 8, or 16) * F
XIN
. The
PL580-3X is designed to address the demanding
requirements of high performance applications such
as SONET, GPS, Video, etc.
SEL2^
OE_CTRL
VCON
PL580-3X
2
3
4
5
GNDANA
3x3 QFN
Note1: QBAR is used for single ended CMOS output
.
Note2: ^ Denotes internal pull up resistor.
BLOCK DIAGRAM
VCON
VARICAP
VCO
Divider
Charge
Pump
+
Loop
Filter
Output
Divider
(1,2,4,8)
GNDBUF
LP
LM
XIN
XOUT
XTAL
OSC
Phase
Detector
VCO
(F
XiN
x16)
QBAR
Q
Performance Tuner
OE
47745 Fremont Blvd., Fremont, California 94538 Tel (510) 492-0990 Fax (510) 492-0991
www.phaselink.com
Rev 09/29/05 Page 1