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RF2938 fiches techniques PDF

RF Micro Devices - 2.4GHZ SPREAD-SPECTRUM TRANSCEIVER

Numéro de référence RF2938
Description 2.4GHZ SPREAD-SPECTRUM TRANSCEIVER
Fabricant RF Micro Devices 
Logo RF Micro Devices 





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RF2938 fiche technique
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Typical Applications
• Wireless LANs
• Wireless Local Loop
• Secure Communication Links
RF2938
2.4GHZ SPREAD-SPECTRUM TRANSCEIVER
• Inventory Tracking
• Wireless Security
• Digital Cordless Telephones
Product Description
The RF2938 is a monolithic integrated circuit specifically
designed for direct-sequence spread-spectrum systems
operating in the 2.4GHz ISM band. The part includes a
direct conversion from IF receiver, quadrature demodula-
tor, I/Q baseband amplifiers with gain control and RSSI,
on-chip programmable baseband filters, dual data com-
parators. 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 maximum) battery applications are supported by
the part. The part is also designed to be part of a 2.4GHz
chip set consisting of the RF2444 LNA/Mixer and one of
the many RFMD high efficiency GaAs HBT PA’s and a
dual frequency synthesizer.
Optimum Technology Matching® Applied
Si BJT
üSi Bi-CMOS
GaAs HBT
SiGe HBT
GaAs MESFET
Si CMOS
48 47 46 45 44 43 42 41 40 39 38 37
NC 1
36 NC
NC 2
35 NC
PD 3
RX
RX EN 4
TX EN 5
VCC1 6
34 RXQ DATA
33 Q OUT
I
32 RXI DATA
Q
31 I OUT
RX IF IN 7
RX_EN
TX IF IN 8
TX_EN
VCC9 9 TX
TX VGC 10
IF LO 11
VCC8 12
Β2 +45°
-45°
30 VCC4
29 TXQ DATA
I
28 TXQ BP
Q
27 TXI DATA
26 TXI BP
Σ
25 IF1 OUT+
13 14 15 16 17 18 19 20 21 22 23 24
9.00
+ 0.20
0.10 -A-
0.00
9.00
+ 0.10
0.50
4.57
+ 0.10 sq.
0.22
+ 0.05
7° MAX
0° MIN
Exposed pad protrusion
0.0000 to 0.0127 (see note 4).
0.17 MAX.
7.00 1.00
+ 0.10 sq.
+ 0.10
0.60
Dimensions in mm
NOTES:
1. Shaded lead is Pin 1.
+ 0.15
0.10
2. Lead coplanarity - 0.08 with respect to datum "A".
3. Leadframe material: EFTEC 64T copper or equivalent, 0.127 mm (0.005) thick.
4. Solder plating (85/15) on exposed area.
Package Style: TQFP-48 EDF, 9x9
Features
• 45MHz to 500MHz IF Quad Demod
• On-Chip Variable Baseband Filters
• Quadrature Modulator and Upconverter
• 2.7V to 3.6V Operation
• Part of 2.4GHz Radio Chipset
• 2.4GHz PA Driver
Ordering Information
RF2938TR13 2.4GHz Spread-Spectrum Transceiver (Tape & Reel)
RF2938 PCBA Fully Assembled Evaluation Board
11
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
Rev A8 010418
2-1

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