12-Bit, 80 MSPS/105 MSPS/125 MSPS, 1.8 V Analog-to-Digital Converter AD9233 FEATURES FUNCTIONAL BLOCK DIAGRAM AVDD DRVDD 1.8 V analog supply operation 1.8 V to 3.3 V output supply AD9233 SNR = 69.5 dBc (70.5 dBFS) to 70 MHz input VIN+ 8-STAGE SHA MDAC1 A/D SFDR = 85 dBc to 70 MHz input 1 1/2-BIT PIPELINE VIN Low power: 395 mW 125 MSPS 4 8 3 A/D Differential input with 650 MHz bandwidth REFT REFB On-chip voltage reference and sample-and-hold amplifier CORRECTION LOGIC OR DNL = 0.15 LSB 13 Flexible analog input: 1 V p-p to 2 V p-p range OUTPUT BUFFERS DCO Offset binary, Gray code, or twos complement data format D11 (MSB) Clock duty cycle stabilizer VREF D0 (LSB) Data output clock SENSE SCLK/DFS CLOCK 0.5V Serial port control MODE DUTY CYCLE SDIO/DCS SELECT STABILIZER REF Built-in selectable digital test pattern generation CSB SELECT Programmable clock and data alignment AGND CLK+ CLK PDWN DRGND APPLICATIONS Figure 1. Ultrasound equipment IF sampling in communications receivers The digital output data is presented in offset binary, Gray code, or IS-95, CDMA-One, IMT-2000 twos complement formats. A data output clock (DCO) is Battery-powered instruments provided to ensure proper latch timing with receiving logic. Hand-held scopemeters The AD9233 is available in a 48-lead LFCSP and is specified Low cost digital oscilloscopes over the industrial temperature range (40C to +85C). GENERAL DESCRIPTION PRODUCT HIGHLIGHTS The AD9233 is a monolithic, single 1.8 V supply, 12-bit, 80 MSPS/ 105 MSPS/125 MSPS analog-to-digital converter (ADC), featuring 1. The AD9233 operates from a single 1.8 V power supply a high performance sample-and-hold amplifier (SHA) and on- and features a separate digital output driver supply to chip voltage reference. The product uses a multistage differential accommodate 1.8 V to 3.3 V logic families. pipeline architecture with output error correction logic to provide 12-bit accuracy at 125 MSPS data rates and guarantees 2. The patented SHA input maintains excellent performance no missing codes over the full operating temperature range. for input frequencies up to 225 MHz. The wide bandwidth, truly differential SHA allows a variety of 3. The clock DCS maintains overall ADC performance over a user-selectable input ranges and offsets, including single-ended wide range of clock pulse widths. applications. It is suitable for multiplexed systems that switch 4. A standard serial port interface supports various product full-scale voltage levels in successive channels and for sampling features and functions, such as data formatting (offset single-channel inputs at frequencies well beyond the Nyquist rate. binary, twos complement, or Gray coding), enabling the Combined with power and cost savings over previously available clock DCS, power-down, and voltage reference mode. ADCs, the AD9233 is suitable for applications in communications, imaging, and medical ultrasound. 5. The AD9233 is pin compatible with the AD9246, allowing a simple migration from 12 bits to 14 bits. A differential clock input controls all internal conversion cycles. A duty cycle stabilizer (DCS) compensates for wide variations in the clock duty cycle while maintaining excellent overall ADC performance. 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. Tel: 781.329.4700 www.analog.com No license is granted by implication or otherwise under any patent or patent rights of Analog Fax: 781.461.3113 20062020 Analog Devices, Inc. All rights reserved. Devices. Trademarks and registered trademarks are the property of their respective owners. 05492-001AD9233 TABLE OF CONTENTS Features .............................................................................................. 1 Timing ......................................................................................... 22 Applications ...................................................................................... 1 Serial Port Interface (SPI) ............................................................. 23 General Description ......................................................................... 1 Configuration Using the SPI .................................................... 23 Functional Block Diagram .............................................................. 1 Hardware Interface .................................................................... 23 Product Highlights ........................................................................... 1 Configuration Without the SPI ................................................ 23 Revision History ............................................................................... 3 Memory Map .................................................................................. 24 Specifications .................................................................................... 4 Reading the Memory Map Table ............................................. 24 DC Specifications ......................................................................... 4 Layout Considerations ................................................................... 27 AC Specifications ......................................................................... 5 Power and Ground Recommendations .................................. 27 Digital Specifications ................................................................... 6 CML ............................................................................................. 27 Switching Specifications .............................................................. 7 RBIAS ........................................................................................... 27 Timing Diagram ........................................................................... 7 Reference Decoupling................................................................ 27 Absolute Maximum Ratings ........................................................... 8 Evaluation Board ............................................................................ 28 Thermal Resistance ...................................................................... 8 Power Supplies ........................................................................... 28 ESD Caution.................................................................................. 8 Input Signals ............................................................................... 28 Pin Configuration and Function Descriptions ............................ 9 Output Signals ............................................................................ 28 Equivalent Circuits ......................................................................... 10 Default Operation and Jumper Selection Settings ................ 29 Typical Performance Characteristics ........................................... 11 Alternative Clock Configurations ............................................ 29 Theory of Operation ...................................................................... 15 Alternative Analog Input Drive Configuration ..................... 30 Analog Input Considerations ................................................... 15 Schematics ....................................................................................... 31 Voltage Reference ....................................................................... 17 Evaluation Board Layouts ......................................................... 36 Clock Input Considerations ...................................................... 18 Bill of Materials (BOM) ............................................................. 39 Jitter Considerations .................................................................. 19 Outline Dimensions ....................................................................... 42 Power Dissipation and Standby Mode .................................... 20 Ordering Guide .......................................................................... 42 Digital Outputs ........................................................................... 21 Rev. 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