8-103
Product Description
Ordering Information
Typical Applications
Features
Functional Block Diagram
RF Micro Devices, Inc.
7628 Thorndike Road
Greensboro, NC 27409, USA
Tel (336) 664 1233
Fax (336) 664 0454
http://www.rfmd.com
Optimum Technology Matching® Applied
Si BJT
GaAs MESFET
GaAs HBT
Si Bi-CMOS
SiGe HBT
Si CMOS
InGaP/HBT
GaN HEMT
SiGe Bi-CMOS
IF2+
15
IF2-
14
BYPASS
13
IF1+
12
IF1-
11
10
9
8
7
6
GND1B 5
VCC1 4
LNA IN 3
MIX GAIN 2
LNA GAIN 1
20
19
18
17
16
RF2461
CDMA/FM LOW NOISE AMPLIFIER/MIXER
900MHz DOWNCONVERTER
• CDMA/FM (AMPS) Systems
• Dual-Mode TACS/JCDMA Systems
• General Purpose Downconverter
• Commercial and Consumer Systems
• Portable Battery-Powered Equipment
The RF2461 is a receiver front-end designed for the
receive section of dual-mode CDMA/FM cellular applica-
tions. It is designed to amplify and downconvert RF sig-
nals, while providing 30dB of stepped gain control range.
Features include digital control of LNA gain, mixer gain,
and power down mode. Another feature of the chip is
adjustable IIP3 of the LNA and mixer using an off-chip
current setting resistor. Noise figure, IP3, and gain are
designed to be compatible with the IS-98B interim stan-
dard for CDMA cellular communications. The IC is manu-
factured on an advanced Silicon Germanium Bi-CMOS
process and is assembled in a 4mmx4mm, 20-pin, QFN
package.
• Complete Receiver Front-End
• Stepped LNA/Mixer Gain Control
• Adjustable LNA/Mixer Bias Current
• Adjustable LNA/Mixer IIP3
• Meets IMD Tests with Three Gain
States/Two Logic Control Lines
RF2461
CDMA/FM Low Noise Amplifier/Mixer 900MHz
Downconverter
RF2461PCBA-41X Fully Assembled Evaluation Board
0
Rev B6 060925
Dimensions in mm.
Note orientation of package.
12°
MAX
-C-
0.05
1.00
0.90
0.05 C
0.60
0.24 TYP
0.20
0.10
C AB
M
2
0.65
0.30
4 PLCS
2.10 SQ.
0.23
0.13
4 PLCS
0.50
0.75
0.50
NOTES:
Shaded lead is Pin 1.
1
Dimension applies to plated terminal:
to be measured between 0.02 mm and
0.25 mm from terminal end.
2
0.15 C A
2 PLCS
-A-
4.00
3.75
2 PLCS
0.15 C
4.00
0.15 C B
2 PLCS
-B-
3.75
2 PLCS
0.15 C
Package Style: QFN, 20-Pin, 4x4
RoHS Compliant & Pb-Free Product
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