Spot sales of AD9520-1BCPZ 12 LVPECL/24 CMOS Output Clock Generator LFCSP64

Product Descriptions

The AD9520 product series from AD9520-0 to AD9520-5 are very low noise phase-locked loop (PLL) clock synthesizers featuring an integrated voltage controlled oscillator (VCO), clock dividers, and up to 24 outputs. The AD9520 product 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 AD9520-0 to 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 AD9520 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 family. The AD9522 family, which is identical to the AD9520 except that it has low voltage differential signaling (LVDS) outputs, is covered in the UG-077.

Product 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

Product 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

Product Specification

Product Photos

For more product information, please download the PDF