SE2521A80
2.4 GHz Wireless LAN Front End
Preliminary
Applications
IEEE802.11b DSSS WLAN
IEEE802.11g OFDM WLAN
Access Points, PCMCIA, PC cards
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.
Remark
Samples
Tape and Reel
Evaluation kit
Features
Dual Mode IEEE802.11b & IEEE802.11g
All RF ports matched to 50
Ω
Integrated PA, TX Filter, DPDT T/R and Diversity
switches
Integrated Power Detector
20 dBm @ 3.0 % EVM, 802.11g, 54 Mbits
20 dBm, 802.11b, ACPR = -37 dBr, 11 Mbits
Single supply voltage: 3.3 V ± 10 %
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
Functional Block Diagram
V
CC
V
CC3
TX
EN
Bias Circuitry
TX
IN
50 Ohm
Match
Notch
Filter
50 Ohm
OMN + LPF
Switch
ANT_A (50 Ohm)
ANT_B (50 Ohm)
PD_OUT
Power
Detector
50 Ohm
Match
Switch
Control
RX
OUT
C1
C2
C3
C4
Figure 1: Functional Block Diagram
132-DST-01
Rev 1.3
May-26-2009
QA040506
1 of 2
SIGE [ SIGE SEMICONDUCTOR, INC. ]
