Proposed
RF3800
GaAs HBT PRE-DRIVER AMPLIFIER
0
Typical Applications
• Pre-Driver for 450MHz Basestation Amplifiers
• Class AB Operation for Cellular Radio and
• PA Stage for Commercial Wireless Infrastructure Wireless Local Loop
Product Description
-A-
0.0025
Pin 1
The RF3800 is specifically designed for wireless infra-
structure applications in 450MHz. Using a highly reliable
0.005
A
0.200 REF
0.024
GaAs HBT fabrication process, this high-performance
single-stage amplifier achieves high output power over a
0.180
REF
0.198
broad frequency range. The RF3800 also provides excel-
lent efficiency and thermal stability through the use of a
thermally-enhanced surface-mount AlN package. Ease of
integration is accomplished through the incorporation of
an optimized evaluation board design provided to achieve
proper 50Ω operation. Various evaluation board bias con-
figurations are available to address a broad range of wire-
less infrastructure applications.
0.236
0.156
0.025
R.008
0.050
TYP
0.050
REF
0.0780
MAX
0.028
TYP
0.020
7 PL
Optimum Technology Matching® Applied
Package Style: AlN
Si BJT
GaAs HBT
SiGe HBT
GaN HEMT
GaAs MESFET
9
Si Bi-CMOS
InGaP/HBT
Si CMOS
Features
SiGe Bi-CMOS
• 6W Output Power
• High Linearity
• 45% Power-Added Efficiency
• Thermally-Enhanced Packaging
VREF
NC
1
8
7
6
VBIAS
Bias
Circuit
• Broadband Platform Design Approach
2
3
4
RF OUT
RF OUT
RF IN
NC
5 NC
Ordering Information
PACKAGE BASE
GND
RF3800
GaAs HBT Pre-Driver Amplifier
RF3800PCBA-416 Fully Assembled Evaluation Board
RF Micro Devices, Inc.
7628 Thorndike Road
Greensboro, NC 27409, USA
Tel (336) 664 1233
Fax (336) 664 0454
http://www.rfmd.com
Functional Block Diagram
Rev A1 040827
4-623