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RF2670 Datasheet

  • RF2670

  • 8MHZ DUAL BASEBAND AGC WITH PROGRAMMABLE LOW PASS FILTERING

  • 12頁(yè)

  • RFMD

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RF2670
10
Typical Applications
鈥?Digital Cordless Telephones
鈥?Secure Communication Links
鈥?Wireless LANs
鈥?Inventory Tracking
鈥?Wireless Security
鈥?Battery Powered Applications
8MHZ DUAL BASEBAND AGC WITH
PROGRAMMABLE LOW PASS FILTERING
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.
1
.157
.150
.033
.010
.004
.344
.337
.012
.008
.025
.244
.228
8擄MAX
0擄MIN
.069
.053
.050
.016
.010
.008
Optimum Technology Matching廬 Applied
Package Style: SSOP-24
10
IF AMPLIERS
眉
Si Bi-CMOS
Si BJT
GaAs HBT
SiGe HBT
GaAs MESFET
Si CMOS
Features
鈥?I/Q Baseband Receivers
鈥?10dB to 80dB Gain Range
VCC1
20
IN Q+
IN Q-
23
24
0-25 dB
0-20 dB
-12-+12
17dB
VCC2
鈥?Digital and Analog Outputs
15 Q DATA
18 IF OUT Q
21 DCFB Q
5
VCC3
8
鈥?On-Chip Selectable IF Bandwidths
鈥?Reference Voltage for A/D Converter
鈥?2.7V to 3.6V Operation
6 dB
PD
BW SEL2
BW SEL1
11
14
13
DC
Bias
10 RSSI I
17 VREF
16 RSSI Q
19 VGC
IN I+
IN I-
2
1
9 I DATA
7 IF OUT I
4 DCFB I
Ordering Information
RF2670
RF2670PCBA
8MHz Dual Baseband AGC with Programmable Low
Pass Filtering
Fully Assembled Eval Board.
Tel (336) 664 1233
Fax (336) 664 0454
http://www.rfmd.com
Functional Block Diagram
RF Micro Devices, Inc.
7625 Thorndike Road
Greensboro, NC 27409, USA
Rev A4 010820
10-45

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