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ADL5375 Arkusz danych(PDF) 1 Page - Analog Devices |
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ADL5375 Arkusz danych(HTML) 1 Page - Analog Devices |
1 / 6 page Circuit Note CN-0283 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/CN0283. Devices Connected/Referenced ADL5375 400 MHz to 6 GHz Broadband Quadrature Modulator ADL5320 400 MHz to 2700 MHz ¼ Watt RF Driver Amplifier Providing Fixed Power Gain at the Output of an IQ Modulator 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 ©2012 Analog Devices, Inc. All rights reserved. EVALUATION AND DESIGN SUPPORT Circuit Evaluation Boards ADL5375 Evaluation Board (ADL5375-05-EVALZ) Design and Integration Files Schematics, Layout Files, Bill of Materials CIRCUIT FUNCTION AND BENEFITS Whether an IQ modulator is used in a direct conversion application or as an upconverter to a first intermediate frequency (IF), some gain is generally applied directly after the IQ modulator. How to choose an appropriate driver amplifier to provide the first stage of gain at the output of an IQ modulator will be described. The devices shown in Figure 1 are the ADL5375 IQ modulator and the ADL5320 driver amplifier. They are well matched from a system performance level; that is, they have equivalent performance so neither device contributes to degradation in the overall performance. Because these devices are well matched in terms of their dynamic ranges, a simple direct connection between the IQ modulator and the RF driver amplifier is recommended without any need for attenuation between the devices. IBBP IBBN U1 AD L537 5 LOIP LOIN QBBN QBBP QUADRATURE PHASE SPLITTER VPS1 NC VPS2 +5V COMM C1 100pF C5 0.1µF C3 100pF C2 100pF C4 0.1µF LO 1 2 (2) 3 U2 C9 10µF C10 10nF C11 22pF L1 15nH +5V +5V C12 22pF C101 (C7) 1.5pF C100 (C3) 0.5pF λ1 λ3 λ4 λ2 C6 100pF C7 100pF R12 100Ω QP QN R7 100Ω IN IP RFOUT DSOP AMP_OUT NOTE: SEE ADL5320 DATA SHEET FOR COMPONENT SPACING (λ) VALUES 2 5 8 11 12 17 19 20 14 23 6 7 13 15 1 16 18 24 21 3 4 9 10 22 ADL5320 Figure 1. Circuit Schematic for IQ Modulator with Output Power Gain |
Podobny numer części - ADL5375 |
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Podobny opis - ADL5375 |
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