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AD9122-M5375-EBZ Arkusz danych(PDF) 1 Page - Analog Devices |
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AD9122-M5375-EBZ Arkusz danych(HTML) 1 Page - Analog Devices |
1 / 56 page Dual, 16-Bit, 1200 MSPS, TxDAC+® Digital-to-Analog Converter AD9122 Rev. 0 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 Analog Devices, Inc. All rights reserved. FEATURES Flexible LVDS interface allows word, byte, or nibble load Single-carrier W-CDMA ACLR = 82 dBc @ 122.88 MHz IF Analog output: adjustable 8.7 mA to 31.7 mA, RL = 25 Ω to 50 Ω Novel 2×/4×/8× interpolator/complex modulator allows carrier placement anywhere in the DAC bandwidth Digital gain and phase adjustment for sideband suppression Multiple chip synchronization interfaces High performance, low noise PLL clock multiplier Digital inverse sinc filter Flexible LVDS interface allows word, byte, or nibble load Low power: 1.5 W @ 1.2 GSPS, 800 mW @ 500 MSPS, full operating conditions 72-lead, exposed paddle LFCSP APPLICATIONS Wireless infrastructure W-CDMA, CDMA2000, TD-SCDMA, WiMAX, GSM, LTE Digital high or low IF synthesis Transmit diversity Wideband communications: LMDS/MMDS, point-to-point GENERAL DESCRIPTION The AD9122 is a dual 16-bit, high dynamic range, digital-to- analog converter (DAC) that provides a sample rate of 1200 MSPS, permitting a multicarrier generation up to the Nyquist frequency. It includes features optimized for direct conversion transmit applications, including complex digital modulation, and gain and offset compensation. The DAC outputs are optimized to interface seamlessly with analog quadrature modulators, such as the ADL537x F-MOD series from Analog Devices, Inc. A 4-wire serial port interface provides for programming/readback of many internal parameters. Full-scale output current can be programmed over a range of 8.7 mA to 31.7 mA. The AD9122 comes in a 72-lead LFCSP. PRODUCT HIGHLIGHTS 1. Ultralow noise and intermodulation distortion (IMD) enable high quality synthesis of wideband signals from baseband to high intermediate frequencies. 2. A proprietary DAC output switching technique enhances dynamic performance. 3. The current outputs are easily configured for various single-ended or differential circuit topologies. 4. Flexible LVDS digital interface allows the standard 32-wire bus to be reduced to ½ or ¼ of the width. TYPICAL SIGNAL CHAIN NOTES 1. AQM = ANALOG QUADRATURE MODULATOR. COMPLEX BASEBAND DC COMPLEX IF fIF RF LO – fIF DIGITAL BASEBAND PROCESSOR PA I DAC Q DAC 2 2 2/4 2/4 ANTIALIASING FILTER AQM LO SIN COS Figure 1. |
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Podobny opis - AD9122-M5375-EBZ |
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