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
| Attribute | Attribute value |
| ANSM-Part# | ANSM-AD9520-1BCPZ |
| Category | Integrated Circuits (ICs) |
| Clock/Timing | |
| Clock Generators, PLLs, Frequency Synthesizers | |
| Manufacturer | - |
| Series | - |
| Packaging | Tray |
| Part Status | Active |
| DigiKey Programmable | Not Verified |
| Type | Clock Generator, Fanout Distribution |
| PLL | Yes |
| Input | CMOS, LVDS, LVPECL |
| Output | CMOS, LVPECL |
| Number of Circuits | 1 |
| Ratio - Input:Output | 2:12, 2:24 |
| Differential - Input:Output | Yes/Yes |
| Frequency - Max | 2.65GHz |
| Divider/Multiplier | Yes/No |
| Voltage - Supply | 3.135V ~ 3.465V |
| Operating Temperature | -40°C ~ 85°C |
| Mounting Type | Surface Mount |
| Package / Case | 64-VFQFN Exposed Pad, CSP |
| Supplier Device Package | 64-LFCSP-VQ (9x9) |
| Base Product Number | AD9520 |
Product Photos
For more product information, please download the PDF
