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AD9244 Datasheet(PDF) 1 Page - Analog Devices |
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AD9244 Datasheet(HTML) 1 Page - Analog Devices |
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1 / 36 page  a AD9244 14-Bit, 40/65 MSPS A/D Converter REV. A 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. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective companies. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 www.analog.com Fax: 781/326-8703 © 2003 Analog Devices, Inc. All rights reserved. FEATURES 14-Bit, 40/65 MSPS ADC Low Power: 550 mW at 65 MSPS 300 mW at 40 MSPS On-Chip Reference and Sample-and-Hold 750 MHz Analog Input Bandwidth SNR > 73 dBc to Nyquist @ 65 MSPS SFDR > 86 dBc to Nyquist @ 65 MSPS Differential Nonlinearity Error = 0.7 LSB Guaranteed No Missing Codes over Full Temperature Range 1 V to 2 V p-p Differential Full-Scale Analog Input Range Single 5 V Analog Supply, 3.3 V/5 V Driver Supply Out-of-Range Indicator Straight Binary or Twos Complement Output Data Clock Duty Cycle Stabilizer Output Enable Function 48-Lead LQFP Package APPLICATIONS Communications Subsystems (Microcell, Picocell) Medical and High End Imaging Equipment Ultrasound Equipment GENERAL DESCRIPTION The AD9244 is a monolithic, single 5 V supply, 14-bit, 40 MSPS/65 MSPS analog-to-digital converter with an on-chip, high performance sample-and-hold amplifier and voltage reference. The AD9244 uses a multistage differential pipelined architecture with output error correction logic to provide 14-bit accuracy at 40 MSPS/65 MSPS data rates and guarantees no missing codes over the full operating temperature range. The AD9244 has an on-board, programmable voltage reference. An external reference can also be used to suit the dc accuracy and temperature drift requirements of the application. A differential or single-ended clock input is used to control all internal conversion cycles. The digital output data can be pre- sented in straight binary or in twos complement format. An out-of-range (OTR) signal indicates an overflow condition that can be used with the most significant bit to determine low or high overflow. Fabricated on an advanced CMOS process, the AD9244 is available in a 48-lead low profile quad flatpack package (LQFP) and is specified for operation over the industrial temperature range (–40 °C to +85°C). PRODUCT HIGHLIGHTS Low Power—The AD9244, at 550 mW, consumes a frac- tion of the power of presently available ADCs in existing high speed solutions. IF Sampling—The AD9244 delivers outstanding perfor- mance at input frequencies beyond the first Nyquist zone. Sampling at 65 MSPS with an input frequency of 100 MHz, the AD9244 delivers 71 dB SNR and 86 dB SFDR. Pin Compatibility—The AD9244 offers a seamless migration from the 12-bit, 65 MSPS AD9226. On-Board Sample-and-Hold (SHA)—The versatile SHA input can be configured for either single-ended or differ- ential inputs. Out-of-Range (OTR)—The OTR output bit indicates when the input signal is beyond the AD9244’s input range. Single Supply—The AD9244 uses a single 5 V power supply, simplifying system power supply design. It also features a separate digital output driver supply to accom- modate 3.3 V and 5 V logic families. FUNCTIONAL BLOCK DIAGRAM CLK– VIN+ VIN– DCS AGND DGND VREF SENSE OEB D13–D0 OTR DFS AVDD DRVDD 14 14 AD9244 SHA TIMING REFERENCE OUTPUT REGISTER REF GND REFT REFB VR CML CLK+ TEN STAGE PIPELINE ADC |
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