RF2412
5
Typical Applications
鈥?Digital and Spread-Spectrum Systems
鈥?Analog Communication Systems
鈥?UHF Digital and Analog Transmitters
鈥?GMSK, QPSK, DQPSK, QAM
鈥?Portable Battery-Powered Equipment
鈥?Commercial and Consumer Systems
BROADBAND DUAL-CONVERSION
QUADRATURE MODULATOR
Product Description
The RF2412 is a monolithic integrated transmitter univer-
sal modulation IC capable of generating modulated AM,
PM, or compound carriers in the VHF/UHF frequency
range. The modulation is performed at VHF, then the
resulting spectrum is upconverted to a frequency range
between 100MHz to 1000MHz. The IC contains all of the
required components to implement the modulation func-
tion including differential amplifiers for the baseband
inputs, a LO 90擄 hybrid phase splitter, limiting LO amplifi-
ers, two balanced mixers, a combining differential ampli-
fier, a second upconvert balanced mixer, and an output
RF amplifier which will drive a 50鈩?load. Since the modu-
lation is performed at a low frequency, excellent ampli-
tude balance and phase accuracy are obtained.
Optimum Technology Matching廬 Applied
Si BJT
Si Bi-CMOS
GaAs HBT
SiGe HBT
Si CMOS
1
.299
.292
.009
.005
.018
.014
5
MODULATORS AND
UPCONVERTERS
.092
.493
.486
.050
8 擄MAX
0擄MIN
.413
.398
.050
.016
.010
.008
眉
GaAs MESFET
20 RF OUT
Package Style: SOP-20
Features
鈥?Single 3V to 6V Power Supply
鈥?Digitally-Controlled Power Down Mode
鈥?Dual Conversion
鈥?DC to 50MHz Modulation Frequency
鈥?50MHz to 150MHz IF Frequency
鈥?100MHz to 1000MHz RF Frequency
VDD2 1
VDD1 2
PD 3
I SIG 4
I REF 5
POWER
CONTROL
19 GND
18 GND
17 LO2
16 GND
危
Q REF 6
Q SIG 7
GND 8
GND 9
LO1 10
-45擄
+45擄
15 MIX IN+
14 MIX IN-
13 GND
12 MOD OUT-
11 MOD OUT+
Ordering Information
RF2412
RF2412 PCBA
Broadband Dual-Conversion Quadrature Modulator
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 B1 010329
5-7