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.

PACKAGE

PKG.

NO.

HFA3424IB

-40 to 85

8 Ld SOIC

M8.15

HFA3424IB96

-40 to 85

Tape and Reel

GND

RF IN

GND

1

2

3

4

8

7

6

5

GND

RF OUT

GND

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

PRISM® is a registered trademark of Intersil Corporation. PRISM logo is a trademark of Intersil Corporation.