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PDF RF9957 Data sheet ( Hoja de datos )
| Número de pieza | RF9957 | |
| Descripción | CDMA/FM RECEIVE AGC AND DEMODULATOR | |
| Fabricantes | RF Micro Devices | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de RF9957 (archivo pdf) en la parte inferior de esta página. Total 10 Páginas | ||
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7
Typical Applications
• CDMA/FM Cellular Systems
• CDMA PCS Systems
• Wireless Local Loop Systems
RF9957
CDMA/FM RECEIVE AGC AND DEMODULATOR
• Spread-Spectrum Cordless Phones
• High Speed Data Modems
• General Purpose Digital Receivers
Product Description
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.
0.157
0.150
1
0.344
0.337
0.2440
0.2284
8°MAX
0°MIN
0.012
0.008
0.025
0.0098
0.0040
0.0688
0.0532
0.050 0.0098
0.016 0.0075
Optimum Technology Matching® Applied
üSi BJT
GaAs HBT
GaAs MESFET
Si Bi-CMOS
SiGe HBT
Si CMOS
CDMA IN+ 4
CDMA IN- 5
IN SEL 14
Input
Select
FM IN+ 8
FM IN- 9
23
Gain
Control
19
Band Gap
Reference
10 24 18
Quad.
÷2
16 Q OUT+
15 Q OUT-
13 LO+
12 LO-
21 I OUT+
22 I OUT-
Package Style: SSOP-24
Features
• 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
Ordering Information
RF9957
CDMA/FM Receive AGC and Demodulator
RF9957 PCBA 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
7
Rev C11 010622
7-27
1 page  
RF9957
Pin Function Description
Interface Schematic
24 PD Power Down Control. When logic “high” (≥VCC-0.3V), all circuits are
operating; when logic “low” (≤0.5V), all circuits are turned off. The input
impedance of this pin is 10kΩ.
10 kΩ
PD
Pin Out
VCC1 1
VCC2 2
VCC3 3
CDMA IN+ 4
CDMA IN- 5
GND 6
GND 7
FM IN+ 8
FM IN- 9
BG OUT 10
DEC 11
LO- 12
24 PD
23 GC
22 I OUT-
21 I OUT+
20 GND
19 FL+
18 FL-
17 GND
16 Q OUT+
15 Q OUT-
14 IN SEL
13 LO+
7
Rev C11 010622
7-31
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet RF9957.PDF ] | |
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