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AD9739BBCRL Datenblatt(PDF) 1 Page - Analog Devices |
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AD9739BBCRL Datenblatt(HTML) 1 Page - Analog Devices |
1 / 48 page 14-Bit, 2.5 GSPS, RF Digital-to-Analog Converter Data Sheet AD9739 Rev. B 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 ©2009–2012 Analog Devices, Inc. All rights reserved. FEATURES Direct RF synthesis at 2.5 GSPS update rate DC to 1.25 GHz in baseband mode 1.25 GHz to 3.0 GHz in mix mode Industry leading single/multicarrier IF or RF synthesis fOUT = 350 MHz, ACLR =80 dBc fOUT = 950 MHz, ACLR = 78 dBc fOUT = 2100 MHz, ACLR = 69 dBc Dual-port LVDS data interface Up to 1.25 GSPS operation Source synchronous DDR clocking Pin-compatible with the AD9739A Multichip synchronization capability Programmable output current: 8.7 mA to 31.7 mA Low power: 1.16 W at 2.5 GSPS APPLICATIONS Broadband communications systems Military jammers Instrumentation, automatic test equipment Radar, avionics GENERAL DESCRIPTION The AD9739 is a 14-bit, 2.5 GSPS high performance RF digital- to-analog converter (DAC) capable of synthesizing wideband signals from dc up to 3.0 GHz. Its DAC core features a quad- switch architecture that provides exceptionally low distortion performance with an industry-leading direct RF synthesis capability. This feature enables multicarrier generation up to the Nyquist frequency in baseband mode as well as second and third Nyquist zones in mix mode. The output current can be programmed over the 8.66 mA to 31.66 mA range. The inclusion of on-chip controllers simplifies system integration. A dual-port, source synchronous, LVDS interface simplifies the digital interface with existing FGPA/ASIC technology. On-chip controllers are used to manage external and internal clock domain variations over temperature to ensure reliable data transfer from the host to the DAC core. Multichip synchronization is possible with an on-chip synchronization controller. A serial peripheral interface (SPI) is used for device configuration as well as readback of status registers. The AD9739 is manufactured on a 0.18 μm CMOS process and operates from 1.8 V and 3.3 V supplies. It is supplied in a 160-ball chip scale ball grid array for reduced package parasitics. FUNCTIONAL BLOCK DIAGRAM DCI SDO SDIO SCLK CS DACCLK DCO SYNC_OUT SYNC_IN CLK DISTRIBUTION (DIV-BY-4) SPI RESET SYNC- CONTROLLER IOUTP IOUTN VREF I120 IRQ 1.2V DAC BIAS AD9739 TxDAC CORE Figure 1. PRODUCT HIGHLIGHTS 1. Ability to synthesize high quality wideband signals with bandwidths of up to 1.25 GHz in the first or second Nyquist zone. 2. A proprietary quad-switch DAC architecture provides exceptional ac linearity performance while enabling mix mode operation. 3. A dual-port, double data rate, LVDS interface supports the maximum conversion rate of 2500 MSPS. 4. On-chip controllers manage external and internal clock domain skews. 5. A multichip synchronization capability. 6. Programmable differential current output with a 8.66 mA to 31.66 mA range. |
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