RF2449 데이터 시트보기 (PDF) - RF Micro Devices
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RF2449 Datasheet PDF : 14 Pages
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Preliminary
8
Typical Applications
• CDMA/FM Cellular Systems
• Supports Dual-Mode CDMA/AMPS
• Supports Dual-Mode CDMA/TACS
RF2449
CDMA/FM LOW NOISE AMPLIFIER/MIXER
900MHZ DOWNCONVERTER
• General Purpose Downconverter
• Commercial and Consumer Systems
• Portable Battery-Powered Equipment
Product Description
The RF2449 is a receiver front-end designed for the
0.157
0.150
0.0098
0.0040
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,
1
0.344
0.337
0.012
0.008
LNA IIP3, and power down mode. Another feature of the
0.025
chip is adjustable IIP3 of the LNA and mixer using an off-
chip current setting resistor. The LNA IIP3 can be digitally
controlled between two levels to reduce current draw in
CDMA standby and other conditions where high IIP3 is
not required. Noise Figure, IP3, and other specs are
0.0688
0.2440
0.0532
0.2284
8°MAX
8
0°MIN
designed to be compatible with the IS-98 specification for
CDMA cellular communications. The IC is manufactured
on an advanced Silicon Bipolar process and packaged in
0.050 0.0098
0.016 0.0075
an SSOP-24.
Optimum Technology Matching® Applied
Package Style: SSOP-24
Si BJT
!Si Bi-CMOS
GaAs HBT
SiGe HBT
GaAs MESFET
Si CMOS
Features
ENABLE 1
IP SET 2
IF SEL 3
LNA GAIN 4
MIX GAIN 5
LNA IN 6
VCC1 7
GND1B 8
24 LO IN
23 GND2
22 GND2
21 VCC2
20 IF2+
19 IF2-
18 BYPASS
17 IF1-
• Complete Receiver Front-End
• Stepped LNA/Mixer Gain Control
• Adjustable LNA/Mixer Bias Current
• Adjustable LNA/Mixer IIP3
• Digital LNA IIP3 Control
• Meets IS-98 IMD and Single Tone
GND1A 9
LNA OUT 10
11
12
16 IF1+
15 GND3A
14 MIX IN
13 GND3B
Ordering Information
RF2449
RF2449 PCBA
CDMA/FM Low Noise Amplifier/Mixer 900MHz
Downconverter
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 A4 001016
8-75
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