RF2908 데이터 시트보기 (PDF) - RF Micro Devices
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RF2908 Datasheet PDF : 18 Pages
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11
Typical Applications
• Digital Cordless Telephones
• Secure Communication Links
• Wireless LANs
RF2908
915MHZ SPREAD SPECTRUM RECEIVER WITH
PLL FREQUENCY SYNTHESIZER
• Inventory Tracking
• Wireless Security
• Battery Powered Applications
Product Description
The RF2908 is a monolithic integrated circuit specifically
designed for direct-sequence spread-spectrum systems
operating in the 902MHz to 928MHz ISM band. The part
includes a direct conversion receiver, quadrature demod-
ulator, dual IF amplifiers with gain control and RSSI, on-
chip programmable baseband filters, dual data compara-
tors, and a serially programmable 86-channel PLL fre-
quency synthesizer. Two cell or regulated three cell (3.6V
maximum) battery applications are supported by the part.
The part is also designed to operate in compliance with
FCC Part 15.247. The device is provided in 48-lead plas-
tic LQFP packaging.
Optimum Technology Matching® Applied
Si BJT
üSi Bi-CMOS
GaAs HBT
SiGe HBT
GaAs MESFET
Si CMOS
LNA IN 6
MOUT Q± IN Q±
1,2 47,48
LNA
IF Amp
Q Data Amp
39 Q DATA
+45°
-45°
RSSI
Gain Control
42 IF OUT Q
19 IF OUT I
PLL
Freq. Synth.
23
24
Ref
IF Amp
11,12 13,14
MOUT I± IN I±
21 I DATA
I Data Amp
Refer to the Detailed Functional Block Diagram for description of full functionality
.362
.346
.362
.346
.280
.272
.011
.057
.007
.053
.280
.272
7°MAX
0°MIN
.006
.002
.020
.031 .007
.021 MAX
Package Style: LQFP-48
Features
• FCC Part 15.247 Compliant
• Direct Conversion Receiver
• On-Chip 86 Channel Frequency
Synthesizer
• On-Chip Selectable IF Bandwidths
• 2.7V to 3.6V Operation
Ordering Information
RF2908
915MHz Spread Spectrum Receiver with PLL Fre-
quency Synthesizer
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 C1 010904
11-85
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