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
SE2521A80
2.4 GHz Wireless LAN Front End
Preliminary
http://www.sige.com
Email: sales@sige.com
Customer Service Locations:
North America:
1050 Morrison Drive, Suite 100
Ottawa ON K2H 8K7 Canada
Phone: +1 613 820 9244
Fax: +1 613 820 4933
Hong Kong
Phone: +852 3428 7222
Fax: +852 3579 5450
San Diego
Phone: +1 858 668 3541 (ext. 226)
Fax: +1 858 668 3546
United Kingdom
Phone: +44 1279 464217
Fax: +44 1279 464201
Product Preview
The datasheet contains information from the product concept specification. SiGe Semiconductor, Inc. reserves the right to change
information at any time without notification.
Preliminary Information
The datasheet contains information from the design target specification. SiGe Semiconductor, Inc. reserves the right to change
information at any time without notification.
Production testing may not include testing of all parameters.
Information furnished is believed to be accurate and reliable and is provided on an “as is” basis. SiGe Semiconductor, Inc. assumes
no responsibility or liability for the direct or indirect consequences of use of such information nor for any infringement of patents or
other rights of third parties, which may result from its use. No license or indemnity is granted by implication or otherwise under any
patent or other intellectual property rights of SiGe Semiconductor, Inc. or third parties. Specifications mentioned in this publication
are subject to change without notice. This publication supersedes and replaces all information previously supplied. SiGe
Semiconductor, Inc. products are NOT authorized for use in implantation or life support applications or systems without express
written approval from SiGe Semiconductor, Inc.
Copyright 2009 SiGe Semiconductor, Inc.
All Rights Reserved
132-DST-01
Rev 1.3
May-26-2009
QA040506
2 of 2
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