ADL5571-EVALZ データシートの表示（PDF） - Analog Devices

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ADL5571-EVALZ

2.5 GHz to 2.7 GHz WiMAX Power Amplifier

Analog Devices 

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

2.5 GHz to 2.7 GHz

WiMAX Power Amplifier

ADL5571

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

VCC1

VCC2

ADL5571

RFIN

IM1

FIRST

STAGE

IM2

SECOND

STAGE

IM3

THIRD

STAGE

RFOUT

OM

STBY

VREG

BIAS_1

BIAS_2

Figure 1.

BIAS_3

CFLT

Rev. 0

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

rights of third parties that may result from its use. Specifications subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks and registered trademarks are the property of their respective owners.

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.

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