Analog Devices AD9520-0 User Manual

One Technology Way • P.O. Box 9106 • Norwood, MA 02062-9106, U.S.A. • Tel: 781.329.4700 • Fax: 781.461.3113 • www.analog.com
Evaluation Board for the AD9520-0, AD9520-1, AD9520-2, AD9520-3, AD9520-4,

FEATURES

Simple power connection using 6 V wall adapter and
on-board LDO voltage regulators
LDOs are easily bypassed for power measurements
5 ac-coupled differential LVPECL SMA connectors
7 LVPECL differential headers for additional outputs
SMA connectors for
2 reference inputs
Charge pump output
Clock distribution input
USB connection to PC
Microsoft Windows-based evaluation software
with simple graphical user interface
On-board PLL loop filter
Easy access to digital I/O and diagnostic signals via
I/O header
Status LEDs for diagnostic signals

APPLICATIONS

Clocking of analog-to-digital and digital-to-analog
converters up to 2.9 GHz
Networking and communications line cards
Test and measurement equipment
Wireless base stations, controllers
Clock cleanup/jitter attenuation
Clock distribution
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.
and AD9520-5 Product Series
AD9520 EVALUATION BOARD
Figure 1.
Rev. A | Page 1 of 16
Evaluation Board User Guide

GENERAL DESCRIPTION

The AD9520 product series from
very low noise phase-locked loop (PLL) clock synthesizers
featuring an integrated voltage controlled oscillator (VCO),
clock dividers, and up to 24 outputs. The
series features automatic holdover and a flexible reference input
circuit allowing very smooth reference clock switching. The
AD9520 product family also features the necessary provisions
for an external VCXO.
The AD9520 evaluation board is a compact, easy to use
platform for evaluating all features of the
AD9520-5. This user guide covers all six versions of the
AD9520 product family.
Although the Quick Start Guide to the AD9520 PLL section
applies specifically to the AD9520-4, increasing the N
(feedback) divider and channel divider increases the VCO
frequency to the allowable frequency range of other
versions.
For the AD9520-5, which lacks the internal VCO, certain
portions of this user guide that apply to the internal VCO (such
as VCO calibration) can be ignored.
This document covers the AD9520
which is identical to the AD9520
differential signaling (LVDS) outputs, is covered in the UG-077.
For convenience, detailed information from the
sheet has been included here. Use this user guide in conjunction
with the AD9520 and AD9522
documentation available from the Analog Devices, Inc. website.
UG-076
AD9520-0 to AD9520-5 are
AD9520 product
AD9520-0 to
AD9520
family. The AD9522 family,
except that it has low voltage
AD9520 data
data sheets and software