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ADL5570 Datasheet PDF : 10 Pages
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Preliminary Technical Data
FEATURES
Fixed gain of 29 dB
Operation from 2.3 GHz to 2.4 GHz
EVM ≤3% with 16 QAM OFDMA
@ POUT = 25 dBm [3.5V] and
@ POUT = 27.5 dBm [5V]
Input internally matched to 50 Ω
Power supply: 3.2 V to 5.5 V
Quiescent current
130 mA in high power mode
70 mA in low power mode
PAE: >20%
Multiple operating modes to reduce battery drain
Low power mode: 100 mA (Operating)
Standby mode: 10 mA
Sleep mode: < 1 μA
APPLICATIONS
WiMAX/WiBro Mobile Terminals and CPEs
Good performance from 2.5Ghz to 2.7Ghz - See Page 7
GENERAL DESCRIPTION
The ADL5570 is a high linearity 2.3 GHz to 2.4 GHz power
amplifier designed for WiMAX 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 26 dBm while maintaining an EVM
of ≤3% with a supply voltage of 3.5V. PAE is greater than 20% at
POUT = 25 dBm with a 3.5V supply voltage.
The ADL5570 RF input is matched on chip and provides an
input return loss of less than −10 dB. The open-collector output
is externally matched with strip-line and external shunt
capacitance.
2.3 GHz to 2.4 GHz
WiMAX Power Amplifier
ADL5570
FUNCTIONAL BLOCK DIAGRAM
VCC1
VCC2
RFIN IM1 1st stage IM2 2nd stage IM3 3rd stage
OM
RFOUT
STBY
VREG
MODE
Bias_1
Bias_2
Bias_3
CFLT
Figure 1.AD5570 Block Diagram
The ADL5570 operates over a supply voltage range from 3.2 V
to 5.5 V with a supply current of 400mA Burst RMS when
delivering 25 dBm (3.5 V supply). A low power mode is also
available for operation at power levels ≤10 dBm with optimized
operating and quiescent currents of 100 and 70 mA,
respectively. A Standby mode is available which reduces the
quiescent current to 10 mA: useful when a TDD terminal is
receiving data.
The ADL5570 is fabricated in a GaAs HBT process and is
packaged in a 4mm x 4mm 16-Lead Pb-free RoHS compliant
LFCSP that uses an exposed paddle for excellent thermal
impedance. It operates from −40°C to +85°C.
Rev. PrG
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