ADL5571-EVALZ AD [Analog Devices], ADL5571-EVALZ Datasheet

ADL5571-EVALZ

Manufacturer Part Number

ADL5571-EVALZ

Description

2.5 GHz to 2.7 GHz WiMAX Power Amplifier

Manufacturer

AD [Analog Devices]

Datasheet

1.ADL5571-EVALZ.pdf (16 pages)

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FEATURES

Gain: 29 dB

Operation from 2.5 GHz to 2.7 GHz

EVM ≤ 3% with 16 QAM OFDMA

Input matched to 50 Ω

Power supply: 3.2 V to 5 V

Quiescent current: 135 mA

Multiple operating modes to reduce battery drain

APPLICATIONS

WiMAX mobile terminals and CPEs

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.

@ P

Power-added efficiency (PAE)

Standby mode: 9 mA

Sleep mode: <1 μA

21% @ P

OUT

= 25 dBm (3.3 V, 2.6 GHz)

= 27 dBm (5 V, 2.6 GHz)

OUT

= 25 dBm (3.3 V, 2.6 GHz)

VREG

STBY

RFIN

ADL5571

IM1

STAGE

FIRST

BIAS_1

FUNCTIONAL BLOCK DIAGRAM

IM2

SECOND

STAGE

BIAS_2

VCC1

Figure 1.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Fax: 781.461.3113

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 P

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.

IM3

STAGE

THIRD

BIAS_3

VCC2

OUT

WiMAX Power Amplifier

= 25 dBm with a 3.3 V supply voltage.

RFOUT

CFLT

2.5 GHz to 2.7 GHz

ADL5571

www.analog.com

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