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SI4707-B20 Datasheet(PDF) 1 Page - Silicon Laboratories

Part # SI4707-B20
Description  WEATHER BAND AND SAME DATA RECEIVER
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Manufacturer  SILABS [Silicon Laboratories]
Direct Link  http://www.silabs.com
Logo SILABS - Silicon Laboratories

SI4707-B20 Datasheet(HTML) 1 Page - Silicon Laboratories

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Rev. 0.8 6/08
Copyright © 2008 by Silicon Laboratories
Si4707-B20
This information applies to a product under development. Its characteristics and specifications are subject to change without notice.
Si4707-B20
WEATHER B AND AND SAME D ATA R ECEIVER
Features
Applications
Description
The Si4707 is the first digital CMOS weather band and SAME decoder receiver IC
to integrate the complete tuner and decoder functionality from antenna input to
audio and/or data output.
Functional Block Diagram
Weather band support
(162.4–162.55 MHz)
SAME processor

Excellent SAME sensitivity

Byte-wise data quality metrics

Advanced error correction
1050 Hz alert tone detection
Excellent real-world performance
Freq synthesizer with integrated VCO
Automatic frequency control (AFC)
Automatic gain control (AGC)
Adaptive noise suppression
WB digital tuning
Low-IF direct conversion with no
external ceramic filters
Programmable reference clock
Volume control
Receive signal quality indicators
(RSSI and SNR)
2-wire and 3-wire control interface
Integrated LDO regulator
2.7 to 5.5 V supply voltage
Firmware upgradeable
3 x 3 x 0.55 mm 20-pin QFN package
Pb-free/RoHS compliant
Emergency radios
Table and portable radios
Stereos
Mini/micro systems
Portable media players
Boom boxes
Cellular handsets
Modules
Clock radios
Mini HiFi
ADC
ADC
Si4707
DSP
DAC
DAC
ROUT
LOUT
AFC
GPO
RFGND
LNA
FMI
AGC
PGA
RCLK
REG
VDD
2.7–5.5 V
Weather Band
Antenna
XTAL
OSC
32.768 kHz
0/90
CONTROL
INTERFACE
RSSI /
SNR
SAME
GPO
Patents pending
Notes:
1.
To ensure proper operation and
receiver performance, follow the
guidelines in “AN383: Si47xx
Antenna, Schematic, Layout, and
Design Guidelines.” Silicon
Laboratories will evaluate
schematics and layouts for qualified
customers.
2.
Place Si4707 as close as possible to
antenna jack and keep the FMI
traces as short as possible.
Ordering Information:
See page 22.
Pin Assignments
GND
PAD
1
2
3
17
18
19
20
11
12
13
14
6
7
8
9
4
5
16
10
15 NP2
LOUT
ROUT
GND
RST
NC
NP1
VDD
FMI
RFGND
Si4707-B20-GM
(Top View)


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