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ADP3334 Arkusz danych(PDF) 1 Page - Analog Devices |
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ADP3334 Arkusz danych(HTML) 1 Page - Analog Devices |
1 / 5 page Circuit Note CN-0285 Circuits from the Lab™ reference circuits are engineered and tested for quick and easysystemintegrationto helpsolve today’s analog, mixed-signal, and RF design challenges. For more informationand/orsupport, visitwww.analog.com/CN0285. Devices Connected/Referenced ADF4351 Fractional-N PLL IC with Integrated VCO ADL5375 Wideband Transmit Modulator ADP150 Low Noise 3.3 V LDO ADP3334 Low Noise Adjustable LDO Broadband Low Error Vector Magnitude (EVM) Direct Conversion Transmitter Rev. 0 Circuitsfromthe Lab™circuitsfromAnalog Deviceshave been designedandbuiltbyAnalogDevices engineers. Standard engineering practices have been employed in the design and construction of eachcircuit,andtheirfunctionandperformancehavebeentestedandverifiedinalabenvironmentat room temperature. However, you are solely responsible for testing the circuit and determining its suitabilityandapplicabilityforyouruseandapplication.Accordingly,innoeventshallAnalogDevices be liable for direct, indirect, special, incidental, consequential or punitive damages due to any cause whatsoeverconnectedtotheuseofanyCircuitsfromtheLabcircuits. (Continuedonlastpage) 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 ©2013 Analog Devices, Inc. All rights reserved. EVALUATION AND DESIGN SUPPORT Circuit Evaluation Boards CN-0285 Evaluation Board (EVAL-CN0285-EB1Z) Design and Integration Files Schematics, Layout Files, Bill of Materials CIRCUIT FUNCTION AND BENEFITS This circuit is a complete implementation of the analog portion of a broadband direct conversion transmitter (analog baseband in, RF out). RF frequencies from 500 MHz to 4.4 GHz are supported using a phase-locked loop (PLL) with a broadband, integrated voltage controlled oscillator (VCO). Harmonic filtering of the local oscillator (LO) from the PLL ensures excellent quadrature accuracy, sideband suppression, and low EVM. Figure 1. Direct Conversion Transmitter (Simplified Schematic: All Connections and Decoupling Not Shown) 2.7nF 680pF 47nF 1k Ω 360 Ω IBBP IBBN LOIP LOIN QBBP QBBN ADF4351 VVCO VVCO VDD 3.3V CPGND AGND DGND RFOUTB– RFOUTB+ CPOUT 1nF 1nF 4.7k Ω RSET LE DATA CLK REFIN FREFIN VTUNE DVDD AVDD CE 10 28 16 29 1 2 3 22 8 31 9 11 18 21 27 51 Ω AGNDVCO 14 15 17 20 7 PDBRF 26 SDGND 6 32 SDVDD VP 5 SW 4 ADL5375 RFOUT RFOUTA– RFOUTA+ 13 12 VVCO ZBIAS ZBIAS QUADRATURE PHASE SPLITTER I/Q SMA INPUTS I/Q SMA INPUTS ADP150 1µF 1µF 5.5V 5.0V VPS1, VPS2 ADP3334 1µF 1µF 5.5V |
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