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AD9912ABCPZ Datasheet(PDF) 1 Page - Analog Devices |
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AD9912ABCPZ Datasheet(HTML) 1 Page - Analog Devices |
1 / 40 page 1 GSPS Direct Digital Synthesizer with 14-Bit DAC AD9912 Rev. F Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother 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 ©2007–2010 Analog Devices, Inc. All rights reserved. FEATURES 1 GSPS internal clock speed (up to 400 MHz output directly) Integrated 1 GSPS 14-bit DAC 48-bit frequency tuning word with 4 μHz resolution Differential HSTL comparator Flexible system clock input accepts either crystal or external reference clock On-chip low noise PLL REFCLK multiplier 2 SpurKiller channels Low jitter clock doubler for frequencies up to 750 MHz Single-ended CMOS comparator; frequencies of <150 MHz Programmable output divider for CMOS output Serial I/O control Excellent dynamic performance Software controlled power-down Available in two 64-lead LFCSP packages Residual phase noise @ 250 MHz 10 Hz offset: −113 dBc/Hz 1 kHz offset: −133 dBc/Hz 100 kHz offset: −153 dBc/Hz 40 MHz offset: −161 dBc/Hz APPLICATIONS Agile LO frequency synthesis Low jitter, fine tune clock generation Test and measurement equipment Wireless base stations and controllers Secure communications Fast frequency hopping GENERAL DESCRIPTION The AD9912 is a direct digital synthesizer (DDS) that features an integrated 14-bit digital-to-analog converter (DAC). The AD9912 features a 48-bit frequency tuning word (FTW) that can synthesize frequencies in step sizes no larger than 4 μHz. Absolute frequency accuracy can be achieved by adjusting the DAC system clock. The AD9912 also features an integrated system clock phase- locked loop (PLL) that allows for system clock inputs as low as 25 MHz. The AD9912 operates over an industrial temperature range, spanning −40°C to +85°C. BASIC BLOCK DIAGRAM FDBK_IN DAC_OUT AD9912 S1 TO S4 OUT OUT_CMOS FILTER SYSTEM CLOCK MULTIPLIER SERIAL PORT, I/O LOGIC CLOCK OUTPUT DRIVERS DIGITAL INTERFACE DIRECT DIGITAL SYNTHESIS CORE STARTUP CONFIGURATION LOGIC Figure 1. |
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