PL502-02

Low Phase Noise VCXO (24MHz to 50MHz)

FEATURES

 Low phase noise VCXO output for the 24MHz to

50MHz range (-130 dBc at 10kHz offset)

 LVCMOS output

 12 to 25MHz crystal input

 Integrated variable capacitors

 Available with High Drive (30mA) or Standard

Drive (10mA) output

 Wide pull range (± 250 ppm typical)

 Low period jitter: 3ps RMS

 3.3V operation

 Available in 8-Pin SOP.

DESCRIPTION

The PL502-02 is a low cost, high performance, low

phase noise VCXO, providing less than -130dBc at

10kHz offset in the 24MHz to 50MHz operating

range. The very low jitter (3 ps RMS period jitter)

makes this chip ideal for applications requiring volt-

age controlled frequency sources. Input crystal can

range from 12MHz to 25MHz (fundamental resonant

mode).

PIN CONFIGURATION

OUTPUT RANGE

MULTIPLIER

FREQUENCY

RANGE

OUTPUT

BUFFER

x2

24 to 50MHz

LVCMOS

BLOCK DIAGRAM

Reference

Divider

Phase

Comparator

Charge

Pump

Loop

Filter

VCO

VCO

Divider

XTAL

OSC

OE

XIN

XOUT

CLK

VCON

VARICAP

1

2

3

4

5

6

7

8

XOUT

N/C

VCON

GND

XIN

VDD

CLK

N/C

SOP-8L