LX5552
PRODUCTION DATA SHEET
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
WWW.Microsemi .COM
2.4-2.5 GHz Front-End Module with Internally
Matched Power Amplifier, LNA & SPDT Switch
TM
®
Copyright © 2009
Rev. 1.0, 2009-06-02
DESCRIPTION
LX5552 is a high-integration, high-
performance WLAN front-end module
(FEM) for 802.11b/g/n and other
applications in the 2.4-2.5GHz
frequency range. LX5552 integrates a
fully matched InGaP/GaAs Hetero-
junction Bipolar Transistor (HBT)
power amplifier, a low noise amplifier
based on InGaAs Enhancement mode
pseudo-morphic high electron
mobility transistor (E-pHEMT)
technology, and a low-cost Depletion
mode pHEMT (D-pHEMT) single
pole double throw (SPDT) antenna
switch in a single package.
The Tx path of LX5552 features a
two-stage monolithic microwave
integrated circuit (MMIC) power
amplifier with active bias circuitry,
on-chip output power detector, and
50Ω input/output matching inside the
package. With 3.3V supply voltage
and 80mA bias current, the Tx path
provides about 26dB power gain and
+17dBm linear output power, with low
total EVM (<3%) for 64QAM/ 54Mbps
OFDM. Both gain and power are
readily measured at antenna port with
the insertion loss of the Tx switch
included.
The Rx path of LX5552 features
small-signal gain of 12.5dB, low noise
figure of 2dB, and high input third-
order intercept point (IIP3) of +5dBm
with the insertion loss of the the Rx
switch loss included. The LNA
consumes about 10mA current with
3.3V supply voltage.
LX5552 is available in a 16-pin,
3x3mm micro-lead package (MLPQ-
16L). With its high level of functional
integration, best-class performance,
compact footprint and low profile,
LX5552 offers an ideal front-end
solution for the ever demanding design
requirements of today’s WLAN
systems, including 802.11b/g and the
latest 11n MIMO applications.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
KEY FEATURES
2.4-2.5GHz 802.11b/g/n Front-
End Solution in a Single MLP
Package
All RF I/O Matched to 50 Ω
Single-Polarity 3.3V Supply
Small Footprint: 3x3mm
2
Low Profile: 0.55mm
RoHS Compliant & Pb-Free
TX Features :
Power Gain ~ 26dB*
Pout ~ +17dBm* for 3% EVM
Current ~140mA at +17dBm
Pout ~ +21dBm* for 11b
1Mbps DSSS Mask
Compliance
Quiescent Current ~ 80mA
RX Features :
Gain ~ 12.5dB*
Noise Figure ~ 2dB*
IIP3 ~ +5dBm*
* Including SPDT switch loss
APPLICATIONS
IEEE 802.11b/g
IEEE 802.11n MIMO
BLOCK DIAGRAM
L
L
X
X
5
5
5
5
5
5
2
2
*IMN:
Input Matching Network
*OMN:
Output Matching Network
Vref
TxIn
Antenna
Port
Vc1
Det
CtrlTx
CtrlRx
Vdd
RxOut
IMN*
PA
PA
Out
SwIn
OMN*
Vc2
LNA
*IMN:
Input Matching Network
*OMN:
Output Matching Network
Vref
TxIn
Antenna
Port
Vc1
Det
CtrlTx
CtrlRx
Vdd
RxOut
IMN*
PA
PA
Out
SwIn
OMN*
Vc2
LNA
