HFA3925 Datasheet, PDF (1/9 Pages) Intersil Corporation – 2.4GHz - 2.5GHz 250mW Power Amplifier

Data Sheet
HFA3925
July 1998
File Number 4132.4
2.4GHz - 2.5GHz 250mW Power 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 HFA3925 2.4GHz-
2.5GHz, 250mW power amplifier is one of the five chips in
the PRISM™ chip set (see the Typical Application Diagram).
The Intersil HFA3925 is an integrated power amplifier with
transmit/receive switch in a low cost SSOP 28 plastic
package. The power amplifier delivers +27dB of gain with
high efficiency and can be operated with voltages as low as
2.7V. The power amplifier switch is fully monolithic and can
be controlled with CMOS logic levels.
The HFA3925 is ideally suited for QPSK, BPSK or other
linearly modulated systems in the 2.4GHz Industrial,
Scientific, and Medical (ISM) frequency band. It can also be
used in GFSK systems where levels of +25dBm are
required. Typical applications include Wireless Local Area
Network (WLAN) and wireless portable data collection.
REMEMBER: Always apply Negative power to the VG
pins before applying the Positive V_DD bias. Failure to do
so may result in the destruction of the HFA3925 Power
Amplifier.
Pinout
GND 1
GND 2
GND 3
GND 4
GND 5
GND 6
GND 7
RX OUT 8
V_G2 9
GND 10
V_DD1 ¹¹
GND ¹²
GND ¹³
V_G1 ¹⁴
HFA3925
(SSOP)
TOP VIEW
28 GND
27 V_DD TR
26 T/R CNTRL
25 RF OUT
24 GND
23 ^VDD3
22 GND
21 GND
20 GND
19 GND
18 V_DD2
17 V_G3
16 GND
15 RF IN
Features
• Highly Integrated Power Amplifier with T/R Switch
• Operates Over 2.7V to 6V Supply Voltage
• High Linear Output Power (P_1dB: +24dBm)
• Individual Gate Control for Each Amplifier Stage
• Low Cost SSOP-28 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
Ordering Information
PART NUMBER
HFA3925IA
HFA3925IA96
TEMP.
RANGE (^oC)
PACKAGE
-40 to 85 28 Ld SSOP
-40 to 85 Tape and Reel
PKG.
NO.
M28.15
Functional Block Diagram
V_DDX(+)
V_GX(-)
T/R CNTRL
STAGE BIAS CONTROL
RX OUT
RF IN
STAGE 1 STAGE 2 STAGE 3
RF_OUT
TO
ANTENNA
2-179
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.