RF2454
鈥?Digital and Spread Spectrum Systems
鈥?GMSK, QPSK, DQPSK, QAM Modulation
鈥?Private Mobile Radio Systems
鈥?AM, SSB, DSB Modulation
鈥?Image-Reject Upconverters
Si BJT
Si Bi-CMOS
GaAs HBT
SiGe HBT
Si CMOS
The RF2454 is a monolithic integrated universal modula-
tion system capable of generating modulated AM, PM, or
compound carriers in the VHF and UHF frequency range.
The IC contains all of the required components to imple-
ment the modulation function including differential amplifi-
ers for the baseband inputs, a 90擄 hybrid phase splitter,
limiting LO amplifiers, two balanced mixers, a combining
amplifier, and an output RF amplifier which will drive a
50鈩?load. Component matching, which can only be
accomplished with monolithic construction, is used to full
advantage to obtain excellent amplitude balance and high
phase accuracy. The unit features low power consump-
tion, single power supply operation and adjustment free
operation with no external parts required to operate the
part as specified.
.157
.150
.010
.004
1
.018
.014
5
MODULATORS AND
UPCONVERTERS
.344
.337
.050
.244
.228
.065
.043
RF2454
RF2454 PCBA
8 擄MAX
0擄MIN
.050
.016
.010
.007
GaAs MESFET
!"
VDD2 1
VDD1 2
PD 3
1 4 RF OUT
1 3 GND2
1 2 GND
1 1 GND
1 0 GND1
9 PHASE
8 LO IN
鈥?Single 3V to 5V Power Supply
鈥?Low Power and Small Size
鈥?CMOS Compatible Power Down Control
鈥?Excellent Amplitude and Phase Balance
鈥?Low Broadband Noise Floor
鈥?200MHz to 600MHz Operation
I SIG 4
I REF 5
POWER
CONTROL
危
+45擄
-45擄
Q REF 6
Q SIG 7
VHF Quadrature Modulator
Fully Assembled Evaluation Board
RF Micro Devices, Inc.
7625 Thorndike Road
Greensboro, NC 27409, USA
Tel (336) 664 1233
Fax (336) 664 0454
http://www.rfmd.com
Rev A4 000710
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