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ADL5571 Datasheet(PDF) 1 Page - Analog Devices |
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ADL5571 Datasheet(HTML) 1 Page - Analog Devices |
1 / 16 page 2.5 GHz to 2.7 GHz WiMAX Power Amplifier ADL5571 Rev. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other 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 ©2008 Analog Devices, Inc. All rights reserved. FEATURES Gain: 29 dB Operation from 2.5 GHz to 2.7 GHz EVM ≤ 3% with 16 QAM OFDMA @ POUT = 25 dBm (3.3 V, 2.6 GHz) @ POUT = 27 dBm (5 V, 2.6 GHz) Input matched to 50 Ω Power supply: 3.2 V to 5 V Quiescent current: 135 mA Power-added efficiency (PAE) 21% @ POUT = 25 dBm (3.3 V, 2.6 GHz) Multiple operating modes to reduce battery drain Standby mode: 9 mA Sleep mode: <1 μA APPLICATIONS WiMAX mobile terminals and CPEs GENERAL DESCRIPTION The ADL5571 is a high linearity 2.5 GHz to 2.7 GHz power amplifier designed for WiMAX mobile terminals and CPEs using TDD operation at a duty cycle of 50% or lower. With a gain of 29 dB and an output compression point of 31 dBm, it can operate at an output power level up to 27 dBm while maintaining an EVM of ≤3% with a supply voltage of 5 V. PAE is 21% at POUT = 25 dBm with a 3.3 V supply voltage. The ADL5571 RF input is matched to provide an input return loss of better than 10 dB. The open-collector output is externally matched with a microstrip line and an external shunt capacitor. The ADL5571 operates over a supply voltage range from 3.2 V to 5 V with a current of 450 mA burst rms when delivering 25 dBm (3.3 V supply). A standby mode is available that reduces the quiescent current to 9 mA, which is useful when a TDD terminal is receiving data. The ADL5571 is fabricated in a GaAs HBT process and is packaged in a 4 mm × 4 mm, 16-lead, Pb-free, RoHS-compliant LFCSP that uses an exposed paddle for excellent thermal impedance. It operates from −40°C to +85°C. FUNCTIONAL BLOCK DIAGRAM RFOUT VCC1 CFLT STBY VREG VCC2 OM RFIN FIRST STAGE SECOND STAGE THIRD STAGE IM1 IM2 IM3 BIAS_2 BIAS_1 BIAS_3 ADL5571 Figure 1. |
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