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ADL5571 Datasheet(PDF) 1 Page - Analog Devices

Part No. ADL5571
Description  2.5 GHz to 2.7 GHz WiMAX Power Amplifier
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
Logo AD - Analog Devices

ADL5571 Datasheet(HTML) 1 Page - Analog Devices

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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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