10-Bit, 40 MSPS, 3 V, 74 mW A/D Converter AD9203 FEATURES FUNCTIONAL BLOCK DIAGRAM CLK AVDD DRVDD CMOS 10-Bit, 40 MSPS sampling A/D converter CLAMP Power dissipation: 74 mW (3 V supply, 40 MSPS) AD9203 STBY CLAMPIN 17 mW (3 V supply, 5 MSPS) AINP A/D AINN Operation between 2.7 V and 3.6 V supply SHA GAIN SHA GAIN 3-STATE Differential nonlinearity: 0.25 LSB A/D D/A A/D D/A Power-down (standby) mode, 0.65 mW REFTF CORRECTION LOGIC REFBF ENOB: 9.55 fIN = 20 MHz Out-of-range indicator BANDGAP OUTPUT BUFFERS OTR REFERENCE VREF Adjustable on-chip voltage reference 10 D9 (MSB) + REFSENSE IF undersampling up to fIN = 130 MHz D0 (LSB) 0.5V Input range: 1 V to 2 V p-p differential or single-ended AVSS PWRCON DFS DRVSS Adjustable power consumption Internal clamp circuit Figure 1. APPLICATIONS CCD imaging Video Portable instrumentation IF and baseband communications Cable modems Medical ultrasound out-of-range signal (OTR) indicates an overflow condition that can be used with the most significant bit to determine over- or GENERAL DESCRIPTION underrange. The AD9203 is a monolithic low power, single supply, 10-bit, The AD9203 can operate with a supply range from 2.7 V to 3.6 40 MSPS analog-to-digital converter, with an on-chip voltage V, an attractive option for low power operation in high-speed reference. The AD9203 uses a multistage differential pipeline portable applications. architecture and guarantees no missing codes over the full operating temperature range. Its input range may be adjusted The AD9203 is specified over industrial (40C to +85C) between 1 V and 2 V p-p. temperature ranges and is available in a 28-lead TSSOP package. The AD9203 has an onboard programmable reference. An PRODUCT HIGHLIGHTS external reference can also be chosen to suit the dc accuracy Low PowerThe AD9203 consumes 74 mW on a 3 V supply and temperature drift requirements of an application. operating at 40 MSPS. In standby mode, power is reduced to An external resistor can be used to reduce power consumption 0.65 mW. when operating at lower sampling rates. This yields power High PerformanceMaintains better than 9.55 ENOB at 40 savings for users who do not require the maximum sample rate. MSPS input signal from dc to Nyquist. This feature is especially useful at sample rates far below 40 Very Small PackageThe AD9203 is available in a 28-lead MSPS. Excellent performance is still achieved at reduced power. TSSOP. For example, 9.7 ENOB performance may be realized with only Programmable PowerThe AD9203 power can be further 17 mW of power, using a 5 MHz clock. reduced by using an external resistor at lower sample rates. Built-In Clamp FunctionAllows dc restoration of video A single clock input is used to control all internal conversion signals. cycles. The digital output data is presented in straight binary or twos complementary output format by using the DFS pin. An 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 rights of third parties that may result from its use. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Specifications subject to change without notice. No license is granted by implication Tel: 781.329.4700 www.analog.com or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. Fax: 781.326.8703 2004 Analog Devices, Inc. All rights reserved. 00573-001AD9203 TABLE OF CONTENTS Specifications..................................................................................... 3 Driving the Analog Input.......................................................... 13 Absolute Maximum Ratings............................................................ 5 Op Amp Selection Guide .......................................................... 14 Thermal Characteristics .............................................................. 5 Differential Mode of Operation ............................................... 15 ESD Caution.................................................................................. 5 Power Control............................................................................. 16 Pin Configuration and Function Descriptions............................. 6 Interfacing to 5 V Systems ........................................................ 16 Terminology ...................................................................................... 7 Clock Input and Considerations .............................................. 16 Typical Performance Characteristics ............................................. 8 Digital Inputs and Outputs ....................................................... 16 Operations ....................................................................................... 11 Applications..................................................................................... 18 Theory of Operation .................................................................. 11 Direct IF Down Conversion ..................................................... 18 Operational Modes..................................................................... 11 Ultrasound Applications ........................................................... 19 Input and Reference Overview ................................................. 12 Evaluation Board ............................................................................ 20 Internal Reference Connection ................................................ 12 Outline Dimensions ....................................................................... 25 External Reference Operation .................................................. 13 Ordering Guide .......................................................................... 25 Clamp Operation........................................................................ 13 REVISION HISTORY 8/04Data sheet changed from Rev. A to Rev. B Changes to Table 5.......................................................................... 16 4/01Data sheet changed from Rev. 0 to Rev. A Updated Format..................................................................Universal Changes to TPC 2 ............................................................................. 8 Added Figures 41 to 46 .................................................................. 23 7/99Revision 0: Initial Version Rev. B Page 2 of 28