12-Bit, 80 MSPS/105 MSPS ADC AD9432 FEATURES GENERAL INTRODUCTION On-chip reference and track-and-hold The AD9432 is a 12-bit, monolithic sampling analog-to-digital On-chip input buffer converter (ADC) with an on-chip track-and-hold circuit and is Power dissipation: 850 mW typical at 105 MSPS optimized for high speed conversion and ease of use. The prod- 500 MHz analog bandwidth uct operates up to a 105 MSPS conversion rate with outstanding SNR: 67 dB 49 MHz AIN at 105 MSPS dynamic performance over its full operating range. SFDR: 80 dB 49 MHz AIN at 105 MSPS The ADC requires only a single 5.0 V power supply and a 105 MHz 2.0 V p-p analog input range encode clock for full performance operation. No external refer- 5.0 V supply operation ence or driver components are required for many applications. 3.3 V CMOS/TTL outputs The digital outputs are TTL-/CMOS-compatible, and a separate Twos complement output format output power supply pin supports interfacing with 3.3 V logic. The encode input supports either differential or single-ended APPLICATIONS mode and is TTL-/CMOS-compatible. Communications Base stations and zero-IF subsystems Fabricated on an advanced BiCMOS process, the AD9432 is Wireless local loop (WLL) available in a 52-lead low profile quad flat package (LQFP) and Local multipoint distribution service (LMDS) in a 52-lead thin quad flat package (TQFP EP). The AD9432 is HDTV broadcast cameras and film scanners specified over the industrial temperature range of 40C to +85C. FUNCTIONAL BLOCK DIAGRAM V V CC DD 12 AIN 12 D11 TO D0 PIPELINE BUF T/H ADC OUTPUT AIN STAGING OR ENCODE TIMING REF ENCODE AD9432 GND VREFOUT VREFIN Figure 1. Rev. F Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 www.analog.com license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Fax: 781.461.3113 20022009 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. 00587-001AD9432 TABLE OF CONTENTS Features .............................................................................................. 1 Terminology .................................................................................... 11 Applications ....................................................................................... 1 Equivalent Circuits ......................................................................... 12 General Introduction ....................................................................... 1 Theory of Operation ...................................................................... 13 Functional Block Diagram .............................................................. 1 Analog Input ............................................................................... 13 Revision History ............................................................................... 2 Encode Input ............................................................................... 13 Specif icat ions ..................................................................................... 3 Encode Voltage Level Definition .............................................. 13 Timing Diagram ........................................................................... 5 Digital Outputs ........................................................................... 14 Absolute Maximum Ratings ............................................................ 6 Voltage Reference ....................................................................... 14 Explanation of Test Levels ........................................................... 6 Timing ......................................................................................... 14 Thermal Characteristics .............................................................. 6 Applications Information .............................................................. 15 ESD Caution .................................................................................. 6 Using the AD8138 to Drive the AD9432 ................................ 15 Pin Configurations and Function Descriptions ........................... 7 Outline Dimensions ....................................................................... 16 Typical Performance Characteristics ............................................. 8 Ordering Guide .......................................................................... 16 REVISION HISTORY 6/09Rev. E to Rev. F 1/02Rev. D to Rev. E Updated Format .................................................................. Universal Edits to Specifications ....................................................................... 3 Reorganized Layout ............................................................ Universal Edits to Absolute Maximum Ratings .............................................. 4 Added TQFP EP Package ................................................. Universal Edits to Ordering Guide ................................................................... 4 Deleted LQFP ED Package ............................................... Universal Addition of Text to Using the AD9432 Section .......................... 10 Changes to Thermal Characteristics Section ................................ 6 Edits to Figure 17a .......................................................................... 15 Changes to Pin Configurations and Function Descriptions Edits to Figure 17b ......................................................................... 16 Section ................................................................................................ 7 Addition of SQ-52 Package Outline ............................................. 18 Changes to Terminology Section.................................................. 11 Deleted Evaluation Board Section ................................................ 15 Updated Outline Dimensions ....................................................... 16 Changes to Ordering Guide .......................................................... 16 Rev. F Page 2 of 16