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參數資料
| 型號： | RF2948B |
| 廠商： | RF MICRO DEVICES INC |
| 元件分類： | 無繩電話/電話 |
| 英文描述： | 2.4GHz SPREAD-SPECTRUM TRANSCEIVER |
| 中文描述： | TELECOM, CELLULAR, RF AND BASEBAND CIRCUIT, QCC32 |
| 封裝： | 5 X 5 MM, QFN-32 |
| 文件頁數： | 1/18頁 |
| 文件大小： | 413K |
| 代理商： | RF2948B |
NOTFORNEWDESGNS
11-239
Product Description
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 HBT
Si Bi-CMOS
SiGe HBT
InGaP/HBT
GaN HEMT
GaAs MESFET
Si CMOS
SiGe Bi-CMOS
32
V
31
V
30
29
B
I OUT
24
28
27
VCC1
4
RX IF IN
5
PD
1
RX EN
2
RX IF BIAS
3
TX IF IN
6
VCC9
7
TX VGC
8
9
I
10
V
11
12
V
13
P
14
V
15
R
16
IF1 OUT-
17
IF1 OUT+
18
TXQ DATA
22
TXI BP
19
TXI DATA
20
VCC4
23
Q
25
Logic
REF
Phase
Splitter
BW
Control
gm-C
LPF
gm-C
LPF
gm-C
LPF
TX
Bias
gm-C
LPF
Σ
÷2
DC
Feedback
DC
Feedback
V
26
RF2948B
2.4GHz SPREAD-SPECTRUM TRANSCEIVER
IEEE 802.11b WLANs
Wireless Residential Gateways
Secure Communication Links
High Speed Digital Links
Wireless Security
Digital Cordless Telephones
The RF2948B is a monolithic integrated circuit specifi-
cally designed for direct-sequence spread-spectrum sys-
tems operating in the 2.4GHz ISM band. The part
includes: a direct conversion from IF receiver with vari-
able gain control; quadrature demodulator; I/Q baseband
amplifiers; and, on-chip programmable baseband filters.
For the transmit side, a QPSK modulator and upconverter
are provided. The design reuses the IF SAW filter for
transmit and receive reducing the number of SAW filters
required. Two-cell or regulated three-cell (3.6V maxi-
mum) battery applications are supported by the part. The
part is also designed to be part of a 2.4GHz chipset con-
sisting of the RF2494 LNA/Mixer, one of the many RFMD
high-efficiency GaAs HBT PA’s and the RF3000 Base-
band Processor.
45MHz to 500MHz IF Quad Demod
On-Chip Variable Baseband Filters
Quadrature Modulator and Upconverter
2.7V to 3.6V Operation
Part of IEEE802.11b Chipset
2.4GHz PA Driver
RF2948B
RF2948BTR13
RF2948B PCBA
2.4GHz Spread-Spectrum Transceiver
2.4GHz Spread-Spectrum Transceiver (Tape & Reel)
Fully Assembled Evaluation Board
0
Rev A6 040930
Shaded lead is pin 1.
-B-
2.50 TYP.
2.37 TYP.
5.00 SQ.
-A-
3
2 PLCS
0.10 C A
2 PLCS
0.10 C B
4.75 SQ.
2 PLCS
0.10 C A
2 PLCS
0.10 C B
0.05
0.00
0.70
0.65
12°
MAX
-C-
SEATING
PLANE
0.90
0.85
0.05 C
0.50
3.45
3.15SQ.
Pin 1 ID
R.20
0.50
0.30
2
0.30
0.18
0.60
0.24
C A B
0.10 M
Dimensions in mm.
Package Style: QFN, 32-Pin, 5x5
NOT FOR NEW DESIGNS
9
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