REV. E

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a

AD9432

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

www.analog.com

Fax: 781/326-8703

© Analog Devices, Inc., 2002

12-Bit, 80 MSPS/105 MSPS

A/D Converter

FUNCTIONAL BLOCK DIAGRAM

12

AIN

ENCODE

12

AD9432

GND

VREFOUT

D11–D0

VREFIN

AIN

ENCODE

TIMING

REF

OUTPUT

STAGING

PIPELINE

ADC

BUF

T/H

OR

FEATURES

On-Chip Reference and Track/Hold

On-Chip Input Buffer

850 mW Typical Power Dissipation at 105 MSPS

500 MHz Analog Bandwidth

SNR = 67 dB @ 49 MHz AIN at 105 MSPS

SFDR = 80 dB @ 49 MHz AIN at 105 MSPS

2.0 V p-p Differential Analog Input Range

Single 5.0 V Supply Operation

3.3 V CMOS/TTL Outputs

Two’s Complement Output Format

APPLICATIONS

Communications

Basestations and ‘Zero-IF’ Subsystems

Wireless Local Loop (WLL)

Local Multipoint Distribution Service (LMDS)

HDTV Broadcast Cameras and Film Scanners

GENERAL INTRODUCTION

The AD9432 is a 12-bit monolithic sampling analog-to-digital

converter with an on-chip track-and-hold circuit and is optimized

for high-speed conversion and ease of use. The product operates

at a 105 MSPS conversion rate with outstanding dynamic per-

formance over its full operating range.

The ADC requires only a single 5.0 V power supply and a

105 MHz encode clock for full-performance operation. No

external reference or driver components are required for many

applications. The digital outputs are TTL/CMOS compatible

and a separate output power supply pin supports interfacing

with 3.3 V logic. The encode input supports either differential

or single-ended and is TTL/CMOS-compatible.

Fabricated on an advanced BiCMOS process, the AD9432 is

available in a 52-lead plastic quad flatpack package (LQFP)

specified over the industrial temperature range (–40

°C to +85°C).