SE2521A80 Datasheet, PDF (1/2 Pages) SiGe Semiconductor, Inc. – 2.4 GHz Wireless LAN Front End Preliminary

SE2521A80
2.4 GHz Wireless LAN Front End
Preliminary
Applications
ƒ IEEE802.11b DSSS WLAN
ƒ IEEE802.11g OFDM WLAN
ƒ Access Points, PCMCIA, PC cards
Features
ƒ Dual Mode IEEE802.11b & IEEE802.11g
ƒ All RF ports matched to 50 Ω
ƒ Integrated PA, TX Filter, DPDT T/R and Diversity
switches
ƒ Integrated Power Detector
ƒ 20 dBm @ 3.0 % EVM, 802.11g, 54 Mbits
ƒ 20 dBm, 802.11b, ACPR = -37 dBr, 11 Mbits
ƒ Single supply voltage: 3.3 V ± 10 %
ƒ Small lead free package, 8 mm x 7 mm x 1.2
mm, MSL 3
Ordering Information
Part Number
SE2521A80
SE2521A80-R
SE2521A80-EK1
Package
24 pin LGA
24 pin LGA
N/A
Remark
Samples
Tape and Reel
Evaluation kit
Functional Block Diagram
Product Description
The SE2521A80 is a complete 802.11 b/g WLAN RF
front-end module providing all the functionality of the
power amplifier, power detector, T/R switch, diversity
switch and associated matching. The SE2521A80
provides a complete 2.4 GHz WLAN RF solution from
the output of the transceiver to the antennas in an
ultra compact form factor.
Designed for ease of use, all RF ports are matched to
50 Ω to simplify PCB layout and the interface to the
transceiver RFIC. The SE2521A80 also includes a
transmitter power detector with 20 dB of dynamic
range and a digital enable control for transmitter
power ramp on/off control. The power ramp rise/fall
time is 1 μsec typical.
The SE2521A80 is pin for pin compatible to SiGe’s
SE2521A34 for easy transition of medium power
designs to higher power designs.
The device also provides a notch filter from 3.2-3.3
GHz prior to the input of the power amplifier.
VCC
VCC3
TXEN
TXIN
50 Ohm
Match
Notch
Filter
PD_OUT
RXOUT
Bias Circuitry
Power
Detector
50 Ohm
Match
50 Ohm
OMN + LPF
Switch
Switch
Control
Figure 1: Functional Block Diagram
132-DST-01 ƒ Rev 1.3 ƒ May-26-2009
QA040506
ANT_A (50 Ohm)
ANT_B (50 Ohm)
C1
C2
C3
C4
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