RF2423
5
Typical Applications
• Digital and Analog Communication Systems • GMSK, QPSK, DQPSK, QAM Modulation
• Spread-Spectrum Communication Systems • AM, SSB, DSB Modulation
• Portable Battery-Powered Equipment
100mW SPREAD-SPECTRUM TRANSMITTER IC
D
E
S
IG
N
S
.157
.150
.018
.014
Product Description
N
E
W
The RF2423 is a monolithic integrated transmitter IC
capable of universal direct modulation for UHF AM, PM,
or compound carriers. The transmitter may be used
stand-alone for applications requiring not more than
100mW output power, or may be used to drive a final
power amplifier. The maximum output level is 100mW,
and is adjustable over a 25dB range by a single positive
voltage. This low-cost IC implements differential amplifi-
ers for the modulation inputs, 90 degree carrier phase
shift network, carrier limiting amplifiers, two matched dou-
bly-balanced mixers, variable gain summing amplifier for
level control, and 100mW linear (class AB) output ampli-
fier.
.010
.004
1
5
MODULATORS AND
UPCONVERTERS
.393
.386
.050
.244
.228
.065
.043
8 °MAX
0°MIN
.050
.016
.010
.007
Optimum Technology Matching® Applied
Si BJT
Si Bi-CMOS
GaAs HBT
SiGe HBT
Si CMOS
!
GaAs MESFET
Package Style: SOP-16
Features
• Single 5V Power Supply
• 100mW Output Power Into 50Ω
• 25dB Gain Control Range
• Excellent Phase & Amplitude Balance
• Digitally Controlled Stand-By Mode
• 800MHz to 1000MHz Operation
GC
PHASE
VDD1
FO
R
1
2
3
4
5
6
7
8
POWER
CONTROL
-45°
+45°
16 STAND BY
15 VDD2
14 VDD3
13 GND3
12 RF OUT
11 GND4
10 Q REF
9 Q SIG
N
O
T
GND2
LO IN
GND1
I REF
I SIG
Σ
Ordering Information
RF2423
RF2423 PCBA
100mW Spread-Spectrum Transmitter IC
Fully Assembled Evaluation Board
Functional 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
Rev A3 001218
5-35
RFMD [ RF MICRO DEVICES ]
