
2-7
HFA3424
2.4GHz - 2.5GHz Low Noise Amplifier
The Intersil 2.4GHz PRISM chip set is
a highly integrated five-chip solution for
RF modems employing Direct
Sequence Spread Spectrum (DSSS)
signaling. The HFA3424 2.4GHz -
2.5GHz low noise amplifier is an optional chip that can be
added to the five chips in the PRISM chip set. The
HFA3424 offers increased sensitivity for systems targeting
802.11 specifications. (See Figure 1, the Typical Application
Diagram.)
The Intersil HFA3424 PRISM is a high performance low
noise amplifier in a low cost SOIC 8 lead surface mount
plastic package. The HFA3424 employs a fully monolithic
design which eliminates the need for external tuning
networks. It can be biased using 3V or 5V supplies and has
an option for biasing at higher currents for increased
dynamic range.
The HFA3424 is ideally suited for use where low noise
figure, high gain, high dynamic range and low power
consumption required. Typical applications include receiver
front ends in the Wireless Local Area Network (WLAN) and
wireless data collection markets in the 2.4GHz Industrial,
Scientific and Medical (ISM) band, as well as standard gain
blocks, buffer amps, driver amps and IF amps in both fixed
and portable systems.
Features
Low Noise Figure . . . . . . . . . . . . . . . . . . . . . . . . . . 1.90dB
High Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14dB
Low Power Consumption . . . . . . . . . . . . . . 3V to 5V, 5mA
High Dynamic Range
DC Decoupled RF Input and Output
No External RF Tuning Elements Necessary
Low Cost SOIC 8 Lead Plastic Package
Applications
Systems Targeting IEEE 802.11 Standard
TDD Quadrature-Modulated Communication
Systems
Wireless Local Area Networks
PCMCIA Wireless Transceivers
ISM Systems
TDMA Packet Protocol Radios
PCS/Wireless PBX
Wireless Local Loop
Pinout
HFA3424
(SOIC)
TOP VIEW
Functional Block Diagram
Ordering Information
PART NUMBER
TEMP.
RANGE (
o
C)
PACKAGE
PKG.
NO.
HFA3424IB
-40 to 85
8 Ld SOIC
M8.15
HFA3424IB96
-40 to 85
Tape and Reel
GND
V
BIAS
RF IN
GND
1
2
3
4
8
7
6
5
GND
V
DD
RF OUT
GND
V
DD
RF IN
LNA 1
RF OUT
EXTENDED
BIAS
Data Sheet
January 1997
File Number
4131.2
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
http://www.intersil.com or 407-727-9207
|
Copyright
Intersil Corporation 1999
PRISM is a registered trademark of Intersil Corporation. PRISM logo is a trademark of Intersil Corporation.