12-Bit, 41 MSPS Monolithic ADC AD9042 FEATURES FUNCTIONAL BLOCK DIAGRAM AV DV CC CC 41 MSPS minimum sample rate 80 dB spurious-free dynamic range A1 TH1 TH2 TH3 A2 AIN 595 mW power dissipation ADC V Single 5 V supply OFFSET ADC DAC 7 2.4V On-chip track-and-hold (T/H) and reference V AD9042 REF REFERENCE 6 Twos complement output format ENCODE DIGITAL ERROR CORRECTION LOGIC INTERNAL CMOS-compatible output levels TIMING ENCODE MSB LSB APPLICATIONS D11D10D9D8D7D6D5D4D3D2D1D0 GND Cellular/PCS base stations Figure 1. GPS anti jamming receivers Communications receivers Spectrum analyzers Electro-optics Medical imaging ATE GENERAL DESCRIPTION The AD9042 is a high speed, high performance, low power, industrial grade is specified from 40C to +85C. However, monolithic 12-bit analog-to-digital converter (ADC). All the AD9042 was designed to perform over the full military necessary functions, including track-and-hold (T/H) and temperature range (55C to +125C) consult the factory for reference, are included on chip to provide a complete conversion military grade product options. solution. The AD9042 operates from a single 5 V supply and PRODUCT HIGHLIGHTS provides CMOS-compatible digital outputs at 41 MSPS. 1. Guaranteed sample rate is 41 MSPS. Designed specifically to address the needs of wideband, multi- 2. Dynamic performance specified over entire Nyquist band channel receivers, the AD9042 maintains 80 dB spurious-free spurious signals 80 dBc typical for 1 dBFS input signals. dynamic range (SFDR) over a bandwidth of 20 MHz. Noise 3. Low power dissipation: 595 mW off a single 5 V supply. performance is also exceptional typical signal-to-noise ratio 4. Reference and track-and-hold included on chip. (SNR) is 68 dB. 5. Packaged in 44-lead LQFP. The AD9042 is built on a high speed complementary bipolar process (XFCB) used by Analog Devices, Inc., and uses an innovative multipass architecture. Units are packaged in a 44-lead LQFP low profile quad flat package. The AD9042 Rev. B 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 19952009 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. 00554-001AD9042 TABLE OF CONTENTS Features .............................................................................................. 1 Theory of Operation ...................................................................... 13 Applications ....................................................................................... 1 Encoding the AD9042 ............................................................... 13 Functional Block Diagram .............................................................. 1 Driving the Analog Input .......................................................... 14 General Description ......................................................................... 1 Power Supplies ............................................................................ 15 Product Highlights ........................................................................... 1 Output Loading .......................................................................... 15 Revision History ............................................................................... 2 Layout Information .................................................................... 15 Specif icat ions ..................................................................................... 3 Digital Wideband Receivers .......................................................... 16 DC Specifications ......................................................................... 3 Introduction ................................................................................ 16 Switching Specifications .............................................................. 4 Noise Floor and SNR ................................................................. 18 AC Specifications .......................................................................... 4 Processing Gain .......................................................................... 18 Absolute Maximum Ratings ............................................................ 6 Overcoming Static Nonlinearities with Dither ...................... 18 Thermal Resistance ...................................................................... 6 Receiver Example ....................................................................... 19 Explanation of Test Levels ........................................................... 6 IF Sampling, Using the AD9042 as a Mix-Down Stage ........ 20 ESD Caution .................................................................................. 6 Receive Chain for Digital and Analog Beam Forming Medical Ultrasound Using the AD9042 ........................................................ 21 Pin Configuration and Function Descriptions ............................. 7 Outline Dimensions ....................................................................... 22 Typical Performance Characteristics ............................................. 8 Ordering Guide .......................................................................... 22 Terminology .................................................................................... 11 Equivalent Circuits ......................................................................... 12 REVISION HISTORY 9/09Rev. A to Rev. B 5/96Rev. 0 to Rev. A Changes to Specifications Section ................................................... 2 Updated Format .................................................................. Universal Changes to Switching Specifications Section................................. 2 Reorganized Layout ............................................................ Universal Changes to AC Specifications Section ............................................ 3 Deleted DH-28 Package ................................................ Throughout Changes to Ordering Guide ............................................................. 4 Changes to General Description Section and Product Changes to Pin Descriptions Section .............................................. 5 Highlights Section ............................................................................ 1 Added Die Layout and Mechanical Information Section ............ 6 Deleted Wafer Test Limits Section ................................................. 4 Changes to Figure 2, Figure 3, Figure 5, and Figure 6 .................. 7 Deleted Die Layout and Mechanical Information Table and Die Changes to Figure 37 ...................................................................... 14 Layout with Pad Labels Figure ........................................................ 6 Added Figure 38 ............................................................................. 15 Changes to Figure 4 .......................................................................... 7 Added Table 2 ................................................................................. 15 Deleted Figure 7 Renumbered Sequentially ................................. 7 Added Figure 43, Figure 44, Figure 45, and Figure 46 .............. 17 Deleted Figure 15 and Figure 16 ..................................................... 9 Added Figure 47 and Figure 48 .................................................... 18 Deleted Evaluation Boards Section .............................................. 13 Changes to Figure 53 ...................................................................... 21 Changes to Layout Information Section ...................................... 16 Changes to Figure 54 ...................................................................... 22 Removed Evaluation Boards Section ........................................... 18 Added Receiver Example Section ................................................. 22 Changes to Figure 49 and Figure 50 ............................................. 19 Added Multitone Performance Section ....................................... 22 Changes to Figure 52 ...................................................................... 20 Added Receive Chain for Digital Beam-Forming Medical Changes to Figure 54 ...................................................................... 22 Ultrasound Using the AD9042 Section ....................................... 23 Updated Outline Dimension ......................................................... 24 Added Figure 58 ............................................................................. 23 Changes to Ordering Guide .......................................................... 24 10/95Rev. 0: Initial Version Rev. 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