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AD9783BCPZRL Datasheet(PDF) 1 Page - Analog Devices |
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AD9783BCPZRL Datasheet(HTML) 1 Page - Analog Devices |
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1 / 36 page  Dual 12-/14-/16-Bit, LVDS Interface, 500 MSPS DACs AD9780/AD9781/AD9783 Rev. A 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 ©2007–2008 Analog Devices, Inc. All rights reserved. FEATURES High dynamic range, dual DAC parts Low noise and intermodulation distortion Single carrier W-CDMA ACLR = 80 dBc @ 61.44 MHz IF Innovative switching output stage permits usable outputs beyond Nyquist frequency LVDS inputs with dual-port or optional interleaved single- port operation Differential analog current outputs are programmable from 8.6 mA to 31.7 mA full scale Auxiliary 10-bit current DACs with source/sink capability for external offset nulling Internal 1.2 V precision reference voltage source Operates from 1.8 V and 3.3 V supplies 315 mW power dissipation Small footprint, RoHS compliant, 72-lead LFCSP APPLICATIONS Wireless infrastructure W-CDMA, CDMA2000, TD-SCDMA, WiMAX Wideband communications LMDS/MMDS, point-to-point RF signal generators, arbitrary waveform generators GENERAL DESCRIPTION The AD9780/AD9781/AD9783 include pin-compatible, high dynamic range, dual digital-to-analog converters (DACs) with 12-/14-/16-bit resolutions, and sample rates of up to 500 MSPS. The devices include specific features for direct conversion transmit applications, including gain and offset compensation, and they interface seamlessly with analog quadrature modulators such as the ADL5370. A proprietary, dynamic output architecture permits synthesis of analog outputs even above Nyquist by shifting energy away from the fundamental and into the image frequency. Full programmability is provided through a serial peripheral interface (SPI) port. Some pin-programmable features are also offered for those applications without a controller. PRODUCT HIGHLIGHTS 1. Low noise and intermodulation distortion (IMD) enable high quality synthesis of wideband signals. 2. Proprietary switching output for enhanced dynamic performance. 3. Programmable current outputs and dual auxiliary DACs provide flexibility and system enhancements. FUNCTIONAL BLOCK DIAGRAM GAIN DAC GAIN DAC OFFSET DAC OFFSET DAC 16-BIT I DAC 16-BIT Q DAC INTERFACE LOGIC INTERNAL REFERENCE AND BIAS SERIAL PERIPHERAL INTERFACE CLKP CLKN LVDS INTERFACE D[15:0] VIA, VIB AUX2N AUX2P AUX1N AUX1P IOUT2N IOUT2P IOUT1N IOUT1P AD9783 DUAL LVDS DAC Figure 1. |
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