
2-187
2
P
Produc t Desc ription
Ordering Information
Typic al Applic ations
Features
Func tional Block Diagram
RF Micro Devices, Inc.
7625 Thorndike Road
Greensboro, NC 27409, USA
Tel (336) 664 1233
Fax (336) 664 0454
http://www.rfmd.com
Optimum Technology Matching Applied
Si BJT
GaAs HBT
Si Bi-CMOS
SiGe HBT
GaAs MESFET
Si CMOS
4
VPD2
3
MODE
2
VPD1
13
N
14
N
15
N
16
R
1
G
10
VCC
11
VCC1
12
VCC1
5
G
6
N
7
R
8
R
9
G
RF2157
PCS CDMA/T DMA 3V POWER AMPLIFIER
3V 1850-1910MHz CDMA PCS Handsets
3V 1750-1780MHz CDMA PCS Handsets
3V TDMA PCS Handsets
Spread-Spectrum Systems
Commercial and Consumer Systems
Portable Battery-Powered Equipment
The RF2157 is a high-power, high-efficiency linear ampli-
fier IC targeting 3V handheld systems. The device is
manufactured on an advanced Gallium Arsenide Hetero-
junction Bipolar Transistor (HBT) process, and has been
designed for use as the final RF amplifier in dual-mode
3V CDMA and TDMA handheld digital equipment,
spread-spectrum systems, and other applications in the
1710MHz to 1910MHz band. The device is packaged in a
compact 4mmx4mm LCC, as well as a 4mmx4mm MLF
(micro leaded package). The frequency response can be
optimized for linear performance over 1710MHz to
1910MHz. The device features a digital mode switch
which can be used to minimize operating current under
low output power conditions.
Single 3V Supply
29dBm Linear Output Power
24dB Linear Gain
35% Linear Efficiency
On-board Power Down Mode
1750MHz to 1910MHz Operation
RF2157
RF2157 PCBA
PCS CDMA Power Amplifier
Fully Assembled Evaluation Board
2
Rev A19 010611
3.75
3.75
+
1.50 SQ
4.00
4.00
1
0.45
0.28
3.20
1.60
0.75
0.50
12°
INDEX AREA 3
1.00
0.90
0.75
0.65
0.05
0.00
NOTES:
5
Package Warpage: 0.05 max.
4
Pins 1 and 9 are fused.
Shaded Pin is Lead 1.
1
Dimension applies to plated terminal and is measured between
0.10 mm and 0.25 mm from terminal tip.
2
The terminal #1 identifier and terminal numbering convention
shall conform to JESD 95-1 SPP-012. Details of terminal #1
identifier are optional, but must be located within the zone
indicated. The identifier may be either a mold or marked
feature.
3
0.80
TYP
2
1
Dimensions in mm.
Package S tyle: LCC , 16-Pin, 4 x 4