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AD9835BRUZ-REEL Datasheet(PDF) 1 Page - Analog Devices |
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AD9835BRUZ-REEL Datasheet(HTML) 1 Page - Analog Devices |
1 / 28 page 50 MHz Direct Digital Synthesizer, Waveform Generator Data Sheet AD9835 FEATURES 5 V power supply 50 MHz speed On-chip COS lookup table On-chip, 10-bit DAC Serial loading Power-down option Temperature range: −40°C to +85°C 200 mW power consumption 16-Lead TSSOP APPLICATIONS Frequency stimulus/waveform generation Frequency phase tuning and modulation Low power RF/communications systems Liquid and gas flow measurement Sensory applications: proximity, motion, and defect detection Test and medical equipment GENERAL DESCRIPTION The AD9835 is a numerically-controlled oscillator employing a phase accumulator, a COS lookup table, and a 10-bit digital- to-analog converter integrated on a single CMOS chip. Modu- lation capabilities are provided for phase modulation and frequency modulation. Clock rates of up to 50 MHz are supported. Frequency accuracy can be controlled to one part in 4 billion. Modulation is effected by loading registers through the serial interface. A power-down bit allows the user to power down the AD9835 when it is not in use; the power consumption reduces to 1.75 mW. This part is available in a 16-lead TSSOP package. Similar DDS products can be found at http://www.analog.com/DDS. FUNCTIONAL BLOCK DIAGRAM IOUT COMP REFIN FS ADJUST REFOUT AGND AVDD DGND DVDD MCLK PSEL0 PSEL1 12 AD9835 ON-BOARD REFERENCE 10-BIT DAC PHASE0 REG PHASE1 REG PHASE2 REG PHASE3 REG FULL-SCALE CONTROL COS ROM PHASE ACCUMULATOR (32 BIT) FREQ0 REG FREQ1 REG 16-BIT DATA REGISTER SYNC FSELECT FSELECT BIT SELSRC SYNC 8 LSBs 8 MSBs DECODE LOGIC FSYNC SCLK SDATA SERIAL REGISTER CONTROL REGISTER FSELECT/PSEL REGISTER DEFER REGISTER SYNC SYNC SELSRC PSEL0 BIT PSEL1 BIT MUX MUX MUX Figure 1. Rev. A Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other 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 www.analog.com Fax: 781.461.3113 ©1998–2011 Analog Devices, Inc. All rights reserved. |
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