RF2705GLow
Noise, Multi-
Mode, Quad-
Band, Quadra-
ture Modula-
tor and PA
Driver
RF2705G
LOW NOISE, MULTI-MODE, QUAD-BAND,
QUADRATURE MODULATOR AND PA DRIVER
RoHS Compliant & Pb-Free Product
Package Style: QFN, 24-Pin, 4x4
MODE B
MODE A
I SIG N
I SIG P
VCC1
24
23
22
21
20
Features
W-CDMA High/Mid/Low
Power Modes
Quad-Band Direct Quadrature
Modulator
Variable Gain PA Drivers
GMSK Bypass Amplifiers
LO Frequency Doubler and
Divider
Baseband Filtering
GND
19
18
RF OUT
WB P
RF OUT
WB N
RF OUT
HB P
RF OUT
HB N
RF OUT
LB P
RF OUT
LB N
17
16
15
14
13
12
GC
VCC2 1
Note: The die flag is the
chip's main ground.
LO HB P 2
LO HB N 3
DIV
2
+45°
-45°
Σ
LO LB P 4
Flo
x2
+45°
-45°
LO LB N 5
Mode Control
and Biasing
Power
Control
MODE C 6
7
MODE D
8
Q SIG N
9
Q SIG P
10
VREF
11
GC DEC
Applications
EDGE/GSM (GSM850/900)
Handsets
EDGE/GSM (DCS/PCS) Hand-
sets
W-CDMA Handsets/Data
Cards
W-CDMA/GSM/EDGE Multi-
mode Handsets and Data
Cards
Functional Block Diagram
Product Description
The RF2705 is a low noise, multi-mode, quad-band direct I/Q to RF modu-
lator and PA driver designed for handset applications where multiple
modes of operation are required. Frequency doublers, dividers and LO
buffers are included to support a variety of LO generation options.
Dynamic power control is supported through a single analog input giving
90dB of power control range for the W-CDMA mode and 40dB of power
control in the other two modes. Three sets of RF outputs are provided:
high band and low band low noise EDGE/GMSK outputs, as well as one
wideband W-CDMA output. The device is designed for 2.7V to 3.3V opera-
tion, and is assembled in a plastic, 24-pin, 4mmx4mm QFN.
Ordering Information
RF2705G
Low Noise, Multi-Mode, Quad-Band, Quadrature Modulator
and PA Driver
RF2705GPCBA-41X Fully Assembled Evaluation Board
Optimum Technology Matching® Applied
GaAs HBT
GaAs MESFET
InGaP HBT
SiGe BiCMOS
Si BiCMOS
SiGe HBT
GaAs pHEMT
Si CMOS
Si BJT
GaN HEMT
RF MICRO DEVICES®, RFMD®, Optimum Technology Matching®, Enabling Wireless Connectivity™, PowerStar®, POLARIS™ TOTAL RADIO™ and UltimateBlue™ are trademarks of RFMD, LLC. BLUETOOTH is a trade-
mark owned by Bluetooth SIG, Inc., U.S.A. and licensed for use by RFMD. All other trade names, trademarks and registered trademarks are the property of their respective owners. ©2006, RF Micro Devices, Inc.
Rev A0 DS060206
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
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