RF2705
0
Typical Applications
• EDGE/GSM (GSM850/900) Handsets
• EDGE/GSM (DCS/PCS) Handsets
• W-CDMA Handsets/Data Cards
Product Description
4.00
LOW NOISE, MULTI-MODE, QUAD-BAND,
QUADRATURE MODULATOR AND PA DRIVER
• W-CDMA/GSM/EDGE Multimode Handsets
and Data Cards
-A-
-B-
1.00
0.80
The RF2705 is a low noise, multi-mode, quad-band direct
I/Q to RF modulator 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 operation, and is assembled in
a plastic, 24-pin, 4mmx4mm QFN.
0.10 C
4.00
0.10 C
0.10 C
0.10 C
2.45
0.50 TYP
+0.10
-0.10
Shaded lead is pin 1.
Dimensions in mm.
-C-
SEATING
PLANE
Scale: None
0.10 C
0.08 C
2.45
+0.10
-0.10
0.05
0.00
0.30
TYP
0.18
0.10 M C A B
0.50
TYP
0.30
Optimum Technology Matching® Applied
Si BJT
Si Bi-CMOS
InGaP/HBT
MODE B
Package Style: QFN, 24-Pin, 4x4
GaAs HBT
SiGe HBT
GaN HEMT
GaAs MESFET
Si CMOS
SiGe Bi-CMOS
Features
• W-CDMA High/Mid/Low Power Modes
• Quad-Band Direct Quadrature Modulator
• Variable Gain PA Drivers
MODE A
I SIG N
I SIG P
VCC1
24
VCC2 1
23
22
21
20
19
RF OUT
18
WB P
GND
Note: The die flag is the
chip's main ground.
• GMSK Bypass Amplifiers
• LO Frequency Doubler and Divider
• Baseband Filtering
LO HB P 2
17
RF OUT
WB N
RF OUT
HB P
RF OUT
HB N
RF OUT
LB P
LO HB N 3
DIV
2
+45°
-45°
16
Σ
LO LB P 4
Flo
x2
+45°
-45°
15
LO LB N 5
Mode Control
and Biasing
Power
Control
14
Ordering Information
RF2705
Low Noise, Multi-Mode, Quad-Band, Quadrature
Modulator and PA Driver
RF2705PCBA-41XFully Assembled Evaluation Board
RF Micro Devices, Inc.
7628 Thorndike Road
Greensboro, NC 27409, USA
Tel (336) 664 1233
Fax (336) 664 0454
http://www.rfmd.com
MODE C 6
7
MODE D
8
Q SIG N
9
Q SIG P
10
VREF
11
GC DEC
12
GC
RF OUT
13
LB N
Functional Block Diagram
Rev A4 041026
5-113
RFMD [ RF MICRO DEVICES ]
