P
R O D U C T
Dual-Band RF Transceiver for
WLAN System Solutions
The PMB 8680 is a low power, high performance
dual-band RF Transceiver for IEEE Wireless LAN
Standards 802.11a, 11b and 11g.
The PMB 8680 is designed to form an Infineon
WLAN chipset in combination with the PMB 8787
Baseband PHY IC, the PMB 8825 dual-band Power
Amplifier and the PMB 8789 MAC IC.
This highly integrated solution together with low
external component requirement (low Bill of
Material) shortens time to market.
B
R I E F
Features
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0.25 µm BiCMOS technology
3-wire bus control
Supply voltage 3.0 ... 3.6 V
WirelessLAN
Applications
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High data-rate wireless LAN
PC card wireless LAN adapters
(Mini) PCI wireless LAN cards
CardBus wireless LAN adapters
Compact flash wireless LAN cards
USB wireless LAN adapters
Wireless LAN modules, access points, bridge
products, and point-to-multipoint systems
Alternative direct supply of regulated supply voltage
2.5 ... 2.7 V
2 integrated voltage regulators (LDO)
Power down modes
Operational temperature -30 ... +85°C
Frequency bands: 2.4 - 2.5 GHz /5.15 - 5.875 GHz
Small size VQFN-48 package (7x7x0.9 mm)
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P M B
8 6 8 0
Dual-Band RF Transceiver
N e v e r
s t o p
t h i n k i n g .
P
R O D U C T
Block Diagram
B
R I E F
RX 2.4 GHz
RX
2.4 GHz
RX Filter / PGC
RX 5 GHz
RX
5 GHz
RSSI
RSSI
2.4 / 5 GHz
CCK Filter
PGC1
PGC2
I
Q
OFDM Filter
TX 5 GHz
0˚
TX
5 GHz
TX 2.4 GHz
TX
2.4 GHz
90˚
PLL
Loop Filter
5 GHz
2.4 GHz
40 MHz Out
Synthesizer
3-Wire Bus
3-Wire Bus
I
Q
Features
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High sensitivity ~10 dBm better than IEEE
requirements
- 74 dBm@54 Mbit/s
- 90 dBm@6 Mbit/s
Highly integrated single chip WLAN RF Transceiver
Dual-band solution for 2.4 GHz and 5 GHz
Dual mode solution for CCK and OFDM
Direct conversion receiver for 802.11b
Low IF receiver for 802.11a and 11g
Integrated channel filter and PGC
DC offset cancellation
Synthesizer with integrated VCO, PLL, 40 MHz XO
with digital frequency calibration
I-Q differential interface for RX and TX multiplexed for
802.11a, 11b and 11g
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Low BOM, low external component count
Highly integrated solution
- No external SAW required
- On-chip low drop regulator
Low power dissipation
- 180 mA for 802.11a
- 140 mA for 802.11g
3-wire bus control interface
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Direct modulation transmitter with programmable out-
put power -24 ... -4 dBm
Ordering Information
Please contact the local Infineon sales office for
dedicated information on our Wireless LAN products
Type
WLAN RF Transceiver
Sales Code
PMB 8680
Package
P-VQFN-48
How to reach us:
http://www.infineon.com
Published by
Infineon Technologies AG,
St.-Martin-Strasse 53,
81669 München
© Infineon Technologies AG 2003. All Rights Reserved.
Attention please!
The information herein is given to describe certain components
and shall not be considered as warranted characteristics.
Terms of delivery and rights to technical change reserved.
We hereby disclaim any and all warranties, including but not
limited to warranties of non-infringement, regarding circuits,
descriptions and charts stated herein.
Infineon Technologies is an approved CECC manufacturer.
Information
For further information on technology, delivery terms
and conditions and prices please contact your nearest
Infineon Technologies Office in Germany or our
Infineon Technologies Representatives worldwide.
Warnings
Due to technical requirements components may contain dan-
gerous substances. For information on the types in question
please contact your nearest Infineon Technologies Office.
Infineon Technologies Components may only be used in life-
support devices or systems with the express written approval
of Infineon Technologies, if a failure of such components can
reasonably be expected to cause the failure of that life-support
device or system, or to affect the safety or effectiveness of that
device or system. Life-support devices or systems are intend-
ed to be implanted in the human body, or to support and/or
maintain and sustain and/or protect human life. If they fail, it is
reasonable to assume that the health of the user or other
persons may be endangered.
Printed in Germany
PS 03031.
NB
Published by Infineon Technologies AG