MAX2430 Datasheet, PDF (1/10 Pages) Maxim Integrated Products – Low-Voltage, Silicon RF Power Amplifier/Predriver

19-1093; Rev 2; 1/98
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Low-Voltage, Silicon RF Power
Amplifier/Predriver
________________General Description
The MAX2430 is a versatile, silicon RF power amplifier
that operates directly from a 3V to 5.5V supply, making
it suitable for 3-cell NiCd or 1-cell lithium-ion battery
applications. It is designed for use in the 800MHz to
1000MHz frequency range and, at 915MHz, can pro-
duce +21dBm (125mW) of output power with greater
than 32dB of gain at V_CC = 3.6V.
A unique shutdown function provides an off supply cur-
rent of typically less than 1µA to save power during
“idle slots” in time-division multiple-access (TDMA)
transmissions. An external capacitor sets the RF output
power envelope ramp time. External power control is
also possible over a 15dB range. The amplifier’s input
is matched on-chip to 50Ω. The output is an open col-
lector that is easily matched to a 50Ω load with few
external components.
The MAX2430 is ideal as a driver amplifier for portable
and mobile telephone systems, or as a complete power
amplifier for other low-cost applications, such as those
in the 915MHz spread-spectrum ISM band. It is fabri-
cated with Maxim’s high-frequency bipolar transistor
process and is available in a thermally enhanced,
16-pin narrow SO and miniature 16-pin PwrQSOP pack-
ages with heat slug.
________________________Applications
Digital Cordless Phones
915MHz ISM-Band Applications
Two-Way Pagers
Wireless LANs
Cellular Phones
AM and FM Analog Transmitters
Functional Diagram
2
SHDN
6
GND1
4
RFIN
VCC1
7
MASTER
BIAS
GAIN
VCC2
8
BIAS
10
MAX2430
DRIVER
OUTPUT
BIAS
9
RFOUT
3, 5
1, 15, 16
11, 12, 13, 14
GND2
GND3
GND4
NOTE: MAX2430IEE (PwrQSOP PACKAGE) UNDERSIDE METAL
SLUG MUST BE SOLDERED TO PCB GROUND PLANE.
____________________________Features
o Operates Over the 800MHz to 1000MHz Frequency
Range
o Delivers 125mW at 915MHz from +3.6V Supply
(100mW typical from +3.0V supply)
o Operates Directly from 3-Cell NiCd or 1-Cell
Lithium-Ion Battery
o Over 32dB Power Gain
o RF Power Envelope Ramping is Programmable
with One External Capacitor
o Input Matched to 50Ω (VSWR < 2:1)
o 15dB Output Power Control Range
o 1µA Typical Shutdown Current
PART
MAX2430IEE
MAX2430ISE
Ordering Information
TEMP. RANGE
-20°C to +85°C
-20°C to +85°C
PIN-PACKAGE
16 PwrQSOP
16 Narrow SO
Pin Configuration
TOP VIEW
GND3 ₁
SHDN ₂
GND2 ₃
RFIN ₄
GND2 ₅
GND1 ₆
VCC1 ₇
VCC2 ₈
MAX2430
16 ^GND3
15 ^GND3
14 ^GND4
13 ^GND4
12 ^GND4
11 ^GND4
10 ^BIAS
9 RFOUT
Narrow SO/PwrQSOP
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