Intersil Corporation HFA3421 Datasheet
TM
HFA3421
Data Sheet September 1997
1.7GHz - 2.3GHz Low Noise Amplifier
The Intersil HFA3421 PRISM® is a high
performance low noise amplifier in a
low cost SOIC 8 lead surface mount
plasticpackage.TheHFA3421 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 HFA3421 is ideally suited for use where low noise
figure, high gain, high dynamic range and low power
consumption are required. Typical applications include
receiver front ends in the Wireless Local Loop (WLL)
systems, as well as standard gain blocks, bufferamps, driver
amps and IF amps in both fixed and portable systems.
Ordering Information
TEMP.
PART NUMBER
HFA3421IB -40 to 85 8 Ld SOIC M8.15
HFA3421IB96 -40 to 85 Tape and Reel
RANGE (oC) PACKAGE
PKG.
NO.
Pinout
HFA3421
(SOIC)
TOP VIEW
File Number 4288.1
Features
• Low Noise Figure . . . . . . . . . . . . . . . . . . . . . . . . . . 1.65dB
• High Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20dB
• Low Power Consumption . . . . . . . . . . . . . . 3V to 5V, 8mA
• High Dynamic Range
• DC Decoupled RF Input and Output
• No External RF Tuning Elements Necessary
• Low Cost SOIC 8 Lead Plastic Package
Applications
• Wireless Local Loop
• TDD Quadrature-Modulated Communication Systems
• Wireless Local Area Networks
• PCMCIA Wireless Transceivers
• TDMA Packet Protocol Radio
• PCS/Wireless PBX
Functional Block Diagram
V
DD
RF OUT
GND
V
BIAS
RF IN
GND
1
2
3
4
2-1
8
GND
7
V
DD
6
RF OUT
5
GND
1-888-INTERSIL or 321-724-7143 | Intersil and Design is a trademark of Intersil Corporation. | Copyright © Intersil Corporation 2000
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
PRISM® is a registered trademark of Intersil Corporation. PRISM logo is a trademark of Intersil Corporation.
EXTENDED
BIAS
LNA 1
RF IN
HFA3421
Absolute Maximum Ratings Thermal Information
Supply Voltage, VDD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +10V
DC
Input Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +17dBm
Supply Current (Note 1). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30mA
Operating Conditions
Temperature Range. . . . . . . . . . . . . . . . . . . . . . . . . . -40oC to 85oC
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTES:
1. Only if pin #2 is used to increase current.
2. θJA is measured with the component mounted on an evaluation PC board in free air.
Thermal Resistance (Typical, Note 2) θJA (oC/W)
SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
Maximum Storage Temperature Range. . . . . . . . . . -65oC to 150oC
Maximum Lead Temperature (Solder 10s). . . . . . . . . . . . . . . .300oC
(SOIC - Lead Tips Only)
Electrical Specifications T
=25oC, Z0=50Ω,VDD= +5V, PIN= -30dBm, f = 1.7-2.3GHz, V
A
= Open Circuit
BIAS
Unless Otherwise Specified
PARAMETER MIN TYP MAX UNITS
LNA Input Frequency Range 1.7 - 2.3 GHz
Gain 14 20 dB
Noise Figure - 1.65 2.30 dB
Input VSWR - 1.5:1 Output VSWR - 1.5:1 Input Return Loss - -14.0 - dB
Output Return Loss - -14.0 - dB
Output 1dB Compression - 7 - dBm
Input IP
3
- -1 - dBm
Reverse Isolation - 30 - dB
Supply Current at VCC = 5V - 8 - mA
Supply Range 2.7 - 5.5 V
V
Voltage TBD TBD TBD V
BIAS
V
Current TBD TBD TBD mA
BIAS
Typical Performance Curves
24
22
5V, 8mA
20
GAIN (dB)
18
16
1.5 1.6 1.7 1.8 1.9 2.0 2.1 2.2
3V, 8mA
FREQUENCY (GHz)
TA = 25oC
5V, 20mA
FIGURE 1. GAIN vs FREQUENCY FIGURE 2. NOISE FIGURE vs FREQUENCY
2-2
1.9
1.8
3V, 8mA
1.7
NOISE FIGURE (dB)
1.6
1.5
1.70 1.75 1.80 1.85 1.90 1.95 2.00
FREQUENCY (GHz)
TA = 25oC
5V, 8mA
5V, 20mA
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