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RF Micro Devices - 8MHZ DUAL BASEBAND AGC WITH PROGRAMMABLE LOW PASS FILTERING

Numéro de référence RF2670
Description 8MHZ DUAL BASEBAND AGC WITH PROGRAMMABLE LOW PASS FILTERING
Fabricant RF Micro Devices 
Logo RF Micro Devices 





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RF2670 fiche technique
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Typical Applications
• Digital Cordless Telephones
• Secure Communication Links
• Wireless LANs
RF2670
8MHZ DUAL BASEBAND AGC WITH
PROGRAMMABLE LOW PASS FILTERING
• Inventory Tracking
• Wireless Security
• Battery Powered Applications
Product Description
The RF2670 is a monolithic integrated circuit specifically
designed for direct conversion to baseband QPSK receiv-
ers. The part provides dual baseband amplifiers with a
70dB gain range (single pin analog input) and separate I
and Q RSSI. On-chip programmable baseband filters are
incorporated into each amplifier providing 1MHz, 2MHz,
4MHz, or 8MHz bandwidth with a 5-pole Bessel
response. I and Q output are available in digital or analog
form. The data comparators use a self generated DC ref-
erence to track DC offsets in the received signal. The
analog outputs have a 500mVpp swing with approxi-
mately 1.7V DC offset. A 2.0V reference voltage is also
available for A/D converters changing DC bias.
Optimum Technology Matching® Applied
Si BJT
üSi Bi-CMOS
GaAs HBT
SiGe HBT
GaAs MESFET
Si CMOS
IN Q+ 23
IN Q- 24
PD 11
BW SEL2 14
BW SEL1 13
IN I+ 2
IN I- 1
20 5
0-25 dB
DC
Bias
0-20 dB
-12-+12
17dB
6 dB
8
15 Q DATA
18 IF OUT Q
21 DCFB Q
10 RSSI I
17 VREF
16 RSSI Q
19 VGC
9 I DATA
7 IF OUT I
4 DCFB I
Functional Block Diagram
.157
.150
1
.344
.337
.033
.012
.008
.025
.010
.004
.244
.228
8°MAX
0°MIN
.069
.053
.050 .010
.016 .008
Package Style: SSOP-24
Features
• I/Q Baseband Receivers
• 10dB to 80dB Gain Range
• Digital and Analog Outputs
• On-Chip Selectable IF Bandwidths
• Reference Voltage for A/D Converter
• 2.7V to 3.6V Operation
Ordering Information
RF2670
RF2670PCBA
8MHz Dual Baseband AGC with Programmable Low
Pass Filtering
Fully Assembled Eval Board.
RF Micro Devices, Inc.
7625 Thorndike Road
Greensboro, NC 27409, USA
Tel (336) 664 1233
Fax (336) 664 0454
http://www.rfmd.com
10
Rev A4 010820
10-45

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