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Product Description
Ordering Information
Typical Applications
Features
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
Optimum Technology Matching® Applied
Si BJT
GaAs MESFET
GaAs HBT
Si Bi-CMOS
SiGe HBT
Si CMOS
Quad.
÷2
Input
Select
Gain
Control
Band Gap
Reference
19
4
5
8
9
CDMA IN+
CDMA IN-
FM IN+
FM IN-
23
10
24
14
IN SEL
18
Q OUT+
I OUT+
Q OUT-
13
12
LO+
LO-
16
15
21
22 I OUT-
RF9957
CDMA/FM RECEIVE AGC AND DEMODULATOR
• CDMA/FM Cellular Systems
• CDMA PCS Systems
• Wireless Local Loop Systems
• Spread-Spectrum Cordless Phones
• High Speed Data Modems
• General Purpose Digital Receivers
The RF9957 is an integrated complete IF AGC amplifier
and Quadrature Demodulator designed for the receive
section of dual-mode CDMA/FM cellular and PCS appli-
cations. It is designed to amplify received IF signals, while
providing 100dB of gain control range, and demodulate to
baseband I and Q signals. Noise Figure, IP3, and other
specifications are designed to be compatible with the IS-
98 and J-STD-018 Interim Standard for CDMA cellular
communications. The IC is manufactured on an advanced
15GHz FT Silicon Bipolar process, and is packaged in a
standard miniature 24-lead plastic SSOP package.
• Supports Dual Mode Operation (CDMA
and FM)
• Digitally Controlled Power Down Mode
• 2.7V to 3.3V Operation
• Quadrature LO Divider
• IF AGC Amp with 100dB Gain Control
RF9957
CDMA/FM Receive AGC and Demodulator
RF9957 PCBA
Fully Assembled Evaluation Board
7
Rev C11 010622
8°MAX
0°MIN
1
0.050
0.016
0.0098
0.0075
0.2440
0.2284
0.025
0.012
0.008
0.0688
0.0532
0.157
0.150
0.0098
0.0040
0.344
0.337
Package Style: SSOP-24
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