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AD9237 Scheda tecnica(PDF) 1 Page - Analog Devices |
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AD9237 Scheda tecnica(HTML) 1 Page - Analog Devices |
1 / 25 page 12-Bit, 20 MSPS/40 MSPS/65 MSPS 3 V Low Power A/D Converter Data Sheet AD9237 Rev. C Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 ©2005–2014 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com FEATURES Ultralow power 85 mW at 20 MSPS 135 mW at 40 MSPS 190 mW at 65 MSPS SNR = 66 dBc to Nyquist at 65 MSPS SFDR = 80 dBc to Nyquist at 65 MSPS DNL = ±0.7 LSB Differential input with 500 MHz bandwidth Flexible analog input: 1 V p-p to 4 V p-p range Offset binary, twos complement, or gray code data formats Output enable pin 2-step power-down Full power-down and sleep mode Clock duty cycle stabilizer APPLICATIONS Ultrasound and medical imaging Battery-powered instruments Hand-held scope meters Low cost digital oscilloscopes Low power digital still cameras and copiers Low power communications FUNCTIONAL BLOCK DIAGRAM SHA VIN+ VIN– DRVDD CLK PDWN MODE CLOCK DUTY CYCLE STABILIZER MODE SELECT DGND OTR D11 D0 AVDD MDAC1 CORRECTION LOGIC OUTPUT BUFFERS REF SELECT AGND 0.5V VREF SENSE AD9237 REFT REFB MODE2 A/D A/D 4 15 12 3 OE 10-STAGE 1 1/2-BIT PIPELINE Figure 1. GENERAL DESCRIPTION The AD9237 is a family of monolithic, single 3 V supply, 12-bit, 20 MSPS/40 MSPS/65 MSPS analog-to-digital converters (ADC). This family features a high performance sample-and- hold amplifier (SHA) and voltage reference. The AD9237 uses a multistage differential pipelined architecture with output error correction logic to provide 12-bit accuracy at 20 MSPS/ 40 MSPS/65 MSPS data rates and guarantees no missing codes over the full operating temperature range. With significant power savings over previously available ADCs, the AD9237 is suitable for applications in imaging and medical ultrasound. Fabricated on an advanced CMOS process, the AD9237 is available in a 32-lead LFCSP and is specified over the industrial temperature range (−40°C to +85°C). PRODUCT HIGHLIGHTS 1. Operating at 65 MSPS, the AD9237 consumes a low 190 mW at 65 MSPS, 135 mW at 40 MSPS, and 85 mW at 20 MSPS. 2. Power scaling reduces the operating power further when running at lower speeds. 3. The AD9237 operates from a single 3 V power supply and features a separate digital output driver supply to accommodate 2.5 V and 3.3 V logic families. 4. The patented SHA input maintains excellent performance for input frequencies beyond Nyquist and can be configured for single-ended or differential operation. 5. The AD9237 is optimized for selectable and flexible input ranges from 1 V p-p to 4 V p-p. 6. An output enable pin allows for multiplexing of the outputs. 7. Two-step power-down supports a standby mode in addition to a power-down mode. 8. The OTR output bit indicates when the signal is beyond the selected input range. 9. The clock duty cycle stabilizer (DCS) maintains converter performance over a wide range of clock pulse widths. |
Codice articolo simile - AD9237 |
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Descrizione simile - AD9237 |
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