12-Bit, 20 MSPS/40 MSPS/65 MSPS/80 MSPS, 1.8 V Dual Analog-to-Digital Converter Data Sheet AD9231 FEATURES FUNCTIONAL BLOCK DIAGRAM AVDD GND SDIO SCLK CSB 1.8 V analog supply operation 1.8 V to 3.3 V output supply SPI SNR ORA 71.3 dBFS at 9.7 MHz input PROGRAMMING DATA D11A VIN+A 69.0 dBFS at 200 MHz input ADC SFDR VINA D0A 93 dBc at 9.7 MHz input DCOA 83 dBc at 200 MHz input VREF Low power SENSE DRVDD AD9231 32 mW per channel at 20 MSPS REF VCM SELECT 71 mW per channel at 80 MSPS ORB RBIAS Differential input with 700 MHz bandwidth D11B VINB On-chip voltage reference and sample-and-hold circuit ADC VIN+B D0B 2 V p-p differential analog input DNL = 0.40 LSB DCOB Serial port control options DIVIDE DUTY CYCLE MODE Offset binary, gray code, or twos complement data format 1 TO 8 STABILIZER CONTROLS Optional clock duty cycle stabilizer CLK+ CLK SYNC DCS PDWN DFS OEB Integer 1-to-8 input clock divider Data output multiplex option Figure 1. Built-in selectable digital test pattern generation Energy-saving power-down modes PRODUCT HIGHLIGHTS Data clock out with programmable clock and data alignment 1. The AD9231 operates from a single 1.8 V analog power supply and features a separate digital output driver supply to accommodate 1.8 V to 3.3 V logic families. APPLICATIONS 2. The patented sample-and-hold circuit maintains excellent Communications performance for input frequencies up to 200 MHz and is Diversity radio systems designed for low cost, low power, and ease of use. Multimode digital receivers 3. A standard serial port interface supports various product GSM, EDGE, W-CDMA, LTE, CDMA2000, WiMAX, TD-SCDMA features and functions, such as data output formatting, I/Q demodulation systems internal clock divider, power-down, DCO/DATA timing Smart antenna systems and offset adjustments, and voltage reference modes. Battery-powered instruments 4. The AD9231 is packaged in a 64-lead RoHS compliant Hand held scope meters LFCSP that is pin compatible with the AD9268 16-bit Portable medical imaging ADC, the AD9258 14-bit ADC, the AD9251 14-bit ADC, Ultrasound and the AD9204 10-bit ADC, enabling a simple migration Radar/LIDAR path between 10-bit and 16-bit converters sampling from 20 MSPS to 125 MSPS. Rev. B Document Feedback 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 20092016 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. 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Technical Support www.analog.com MUX OPTION CMOS CMOS OUTPUT BUFFER OUTPUT BUFFER 08121-001AD9231 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Voltage Reference ....................................................................... 22 Applications ....................................................................................... 1 Clock Input Considerations ...................................................... 23 Functional Block Diagram .............................................................. 1 Channel/Chip Synchronization ................................................ 25 Product Highlights ........................................................................... 1 Power Dissipation and Standby Mode .................................... 25 Revision History ............................................................................... 2 Digital Outputs ........................................................................... 26 General Description ......................................................................... 3 Timing ......................................................................................... 26 Specif icat ions ..................................................................................... 4 Built-In Self-Test (BIST) and Output Test .................................. 27 DC Specifications ......................................................................... 4 Built-In Self-Test (BIST) ............................................................ 27 AC Specifications .......................................................................... 5 Output Test Modes ..................................................................... 27 Digital Specifications ................................................................... 6 Serial Port Interface (SPI) .............................................................. 28 Switching Specifications .............................................................. 7 Configuration Using the SPI ..................................................... 28 Timing Specifications .................................................................. 8 Hardware Interface ..................................................................... 29 Absolute Maximum Ratings ............................................................ 9 Configuration Without the SPI ................................................ 29 Thermal Characteristics .............................................................. 9 SPI Accessible Features .............................................................. 29 ESD Caution .................................................................................. 9 Memory Map .................................................................................. 30 Pin Configuration and Function Descriptions ........................... 10 Reading the Memory Map Register Table ............................... 30 Typical Performance Characteristics ........................................... 12 Open Locations .......................................................................... 30 AD9231-80 .................................................................................. 12 Default Values ............................................................................. 30 AD9231-65 .................................................................................. 14 Memory Map Register Table ..................................................... 31 AD9231-40 .................................................................................. 15 Memory Map Register Descriptions ........................................ 33 AD9231-20 .................................................................................. 16 Applications Information .............................................................. 34 Equivalent Circuits ......................................................................... 17 Design Guidelines ...................................................................... 34 Theory of Operation ...................................................................... 19 Outline Dimensions ....................................................................... 35 ADC Architecture ...................................................................... 19 Ordering Guide .......................................................................... 35 Analog Input Considerations .................................................... 19 REVISION HISTORY 9/2016Rev. A to Rev. B Changes to Figure 3 .......................................................................... 7 6/2010Rev. 0 to Rev. A Changes to Features Section............................................................ 1 10/2009Revision 0: Initial Version Rev. B Page 2 of 36