DATA SHEET
SKY65225-11: WLAN 802.11n 2 x 2 MIMO Intera™
Front-End Module
Features
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Description
The SKY65225-11 Intera nFEM combines two complete dual-band
transmit/receive chains in one compact RF front end module
optimized for 2 x 2 MIMO (multiple in – multiple out) operation, in
compliance with the 802.11n draft standard. The SKY65225-11
includes two 5 GHz PAs and two 2 GHz PAs, each with integrated
input filtering for 3–4 GHz rejection, and two temperature-
compensated, directional power detectors with 20 dB dynamic
range. Also included are low loss, high rejection GaAs diplexers
and switches which provide high linearity in all transmit paths and
low loss in all receive paths. All RF ports are matched to 50
Ω.
The SKY65225-11 Intera nFEM achieves outstanding gain
matching between both 2 GHz transmit paths and both 5 GHz
transmit paths, which is a critical requirement for MIMO operation.
This is accomplished though mirrored layout symmetry.
The SKY65225-11 is packaged in a lead (Pb)-free, RoHS-compliant
laminate package, which measures 140 mm
2
. This tiny footprint
enables more functionality in less PCB space.
Rx0ag
R0g
Diplexer
R0a
2 GHz
A0
T0g
Dir
Det
Diplexer
5 GHz
T0a
PD0ag
PU0g
PU0a
PU1g
PU1a
PD1ag
Dir
Det
5 GHz
Diplexer
Dir
Det
2 GHz
R1a
Diplexer
R1g
Rx1ag
Tx1ag
A1
PA
Controller
Dir
Det
Tx0ag
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Two full dual-band transmit/receive chains
PCIe, miniPCI, Cardbus, and access point applications
Backward-compatible with 802.11a/b/g standards
P
OUT
@ 2.5% EVM: 16 dBm (-11a); 19 dBm (-11b);
19 dBm (-11g)
Gain matching: <1.0 dB @ 2 GHz, 2.0 dB @ 5 GHz
Single 3.0–3.6 V power supply, internal voltage regulation
Temperature-compensated PA bias networks and directional
power detection
Separate digital controls for each PA
Package size: 10 x 14 x 0.9 mm
Lead (Pb)-free and RoHS-compliant MSL-3 @ 250 °C
per JEDEC J-STD-020
NEW
Skyworks offers lead (Pb)-free, RoHS (Restriction of
Hazardous Substances)-compliant packaging.
Functional Block Diagram
T1a
T1g
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
200554 Rev. C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 7, 2007
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SKYWORKS [ SKYWORKS SOLUTIONS INC. ]
