intersil ISL3990 DATA SHEET
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ISL3990
Data Sheet January 2003
Dual Band Power Amplifier
The ISL3990 is a Dual Band monolithic
GaAs Power Amplifier designed to
operate in both the ISM and U-NII
Bands. It features two low voltage single supply stages
which cascaded deliver 21dBm (Typ) output power f or ISM,
and three stages which deliver 16 dBm (T yp) for U-NII OFDM
applications.
In addition, the device includes a Dual Band detector which
is accurate over a 15dB dynamic range within (±)1dB, which
can be used to implement an accurate ALC function.
The ISL3990 is housed in a 24 lead QFN package.
Ordering Information
TEMP
PART NUMBER
ISL3990IR -40 to 85 24 Ld. QFN L24.4x4
ISL3990IR-TK -40 to 85 Tape and Reel (1000 units)
RANGE (oC) PACKAGE PKG. NO.
FN8048
Features
• Single Supply. . . . . . . . . . . . . . . . . . . . . . . . . 2.7V to 3.6V
• Output Power . . . . . . . . . . . . . . . . . . . . . . . . .21dBm (Typ)
• Power Gain. . . . . . . . . . . . . . . . . . . . . . . . . . . . 28dB (Typ)
• Detector Linear Input Power Range. . . . . . . . . . . . . .15dB
• Detector Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±1dB
QFN Package
• Compliant to JEDEC PUB95 MO-220 QFN - Quad Flat No
Leads - Package Outline
• Near Chip Scale Package footprint, which improves PCB
efficiency and has a thinner profile
Applications
• Systems Targeting IEEE802.11a/b/g WLANs
• Wireless Local Area Networks (WLAN)
• PCMCIA Wireless Transceivers
• ISM Systems Including Automatic Level Control (ALC)
• TDMA Packet Protocol Radios
Simplified Block Diagram
+3.3V
2GHZ_BIAS
2GHZ_DET_OUT
5GHZ_RF_IN
5GHZ_BIAS
5GHZ_DET_OUT
BIAS
PEAK DETECTOR
BIAS
PEAK DETECTOR
2GHZ_RF_OUT2 GHZ_RF_IN
5GHZ_RF_OUT
Pinout
5GHZ_DET_OUT
+3.3V
+3.3V
5GHZ_RF_IN
GND
GND
19
20
21
22
23
24
ISL3990 (QFN)
TOP VIEW
5GHZ_RF_OUT
5GHZ_RF_OUT
GND
18
1617
1
3
2
GND
2GHZ BIAS
5GHZ_BIAS
15
4
GND
GND
2GHZ_DET_OUT
GND
14
13
12
GND
11
2GHZ_RF_OUT
2GHZ_RF_OUT
10
9
GND
8
+3.3V
7
+3.3V
6
5
GND
2GHZ_RF_IN
1
PRISM and design is a trademark of Intersil Americas Inc. Copyright © Intersil Americas Inc. 2003. All Rights Reserved
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
| Intersil (and design) is a registered trademark of Intersil Americas Inc.
All other trademarks mentioned are the property of their respective owners.
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