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Datenblatt-Suchmaschine für elektronische Bauteile |
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Datenblatt-Suchmaschine für elektronische Bauteile |
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AD9238BSTRL-20 Datenblatt(PDF) 1 Page - Analog Devices |
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AD9238BSTRL-20 Datenblatt(HTML) 1 Page - Analog Devices |
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1 / 24 page  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 oth- erwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. 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. AD9238 12-Bit, 20/40/65 MSPS Dual A/D Converter FUNCTIONAL BLOCK DIAGRAM SHA A/D SHA A/D CLOCK DUTY CYCLE STABILIZER MODE SELECT OEB_A OTR_A D11_A D0_A MUX_SELECT CLK_A CLK_B DCS DFS PDWN_A PDWN_B SHARED_REF OEB_B OTR_B D11_B D0_B DRGND AGND DRVDD AVDD 0.5V VIN+_A VIN–_A REFT_A REFB_A VREF SENSE AGND REFB_B REFT_B VIN–_B VIN+_B FEATURES Integrated Dual 12-Bit Analog-to-Digital Converters Single 3 V Supply Operation (2.7 V to 3.6 V) SNR = 70 dBc (to Nyquist, AD9238-65) SFDR = 85 dBc (to Nyquist, AD9238-65) Low Power: 600 mW at 65 MSPS Differential Input with 500 MHz 3 dB Bandwidth On-Chip Reference and SHA Flexible Analog Input: 1 V p-p to 2 V p-p Range Offset Binary or Twos Complement Data Format Clock Duty Cycle Stabilizer APPLICATIONS Ultrasound Equipment IF Sampling in Communications Receivers: IS-95, CDMA One, IMT-2000 Battery-Powered Instruments Hand-Held Scopemeters Low Cost Digital Oscilloscopes PRODUCT HIGHLIGHTS 1. Integrated, dual version of the AD9235—a 12-bit, 20 MSPS/40 MSPS/65 MSPS ADC. 2. Speed grade options of 20 MSPS, 40 MSPS, and 65 MSPS allow flexibility between power, cost, and performance to suit an application. 3. The AD9238 operates from a single 3 V power supply and features a separate digital output driver supply to accommo- date 2.5 V and 3.3 V logic families. 4. Low power consumption: AD9238-20 operating at 20 MSPS consumes a low 180 mW. AD9238-40 operating at 40 MSPS consumes a low 330 mW. AD9238-65 operating at 65 MSPS consumes a low 600 mW. 5. The patented SHA input maintains excellent performance for input frequencies up to 100 MHz and can be configured for single-ended or differential operation. 6. Typical channel isolation of 80 dB @ fIN = 10 MHz. 7. The clock duty cycle stabilizer (AD9238-65 only) maintains performance over a wide range of clock duty cycles. 8. The OTR output bits indicate when either input signal is beyond the selected input range. 9. Multiplexed data output option enables single-port operation from either data port A or data port B. GENERAL DESCRIPTION The AD9238 is a dual, 3 V, 12-bit, 20 MSPS/40 MSPS/65 MSPS analog-to-digital converter. It features dual high performance sample-and-hold amplifiers and an integrated voltage reference. The AD9238 uses a multistage differential pipelined architecture with output error correction logic to provide 12-bit accuracy and guarantee no missing codes over the full operating temperature range at data rates up to 65 MSPS. The wide bandwidth, differential SHA allows for a variety of user selectable input ranges and offsets including single-ended applications. It is suitable for various applications including multi- plexed systems that switch full-scale voltage levels in successive channels and for sampling inputs at frequencies well beyond the Nyquist rate. The AD9238 is suitable for applications in commu- nications, imaging, and medical ultrasound. Dual single-ended clock inputs are used to control all internal con- version cycles. A duty cycle stabilizer is available on the AD9238-65 and can compensate for wide variations in the clock duty cycle, allowing the converters to maintain excellent performance. The digital output data is presented in either straight binary or twos complement format. Out-of-range signals indicate an overflow condition, which can be used with the most significant bit to deter- mine low or high overflow. Fabricated on an advanced CMOS process, the AD9238 is avail- able in a space saving 64-lead LQFP and is specified over the industrial temperature range (–40°C to +85°C). REV. A |
Ähnliche Teilenummer - AD9238BSTRL-20 |
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Ähnliche Beschreibung - AD9238BSTRL-20 |
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