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SI4745 Arkusz danych(PDF) 1 Page - Silicon Laboratories

Numer części SI4745
Szczegółowy opis  Automotive AM/FM Radio Receiver
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Producent  SILABS [Silicon Laboratories]
Strona internetowa  http://www.silabs.com
Logo SILABS - Silicon Laboratories

SI4745 Arkusz danych(HTML) 1 Page - Silicon Laboratories

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AM/FM Receiver
Copyright © 2008 by Silicon Laboratories
10.23.08
ADC
ADC
Si474x
DSP
DAC
DAC
AMI
VIO
CNTRL
RST
ROUT
LOUT
LDO
VDD
GND
3.0–3.6 V
RDS
GND
FMI
LNA
LNA
DIGITAL
AUDIO
DOUT
DFS
DCLK
AGC
AGC
AFC
WEAK
SIGNAL
CONDITION
QUALITY
DETECTOR
AGC
GPO1-3
Si4740/41/42/43/44/45
Automotive AM/FM Radio Receiver
Description
The Si474x receiver family applies 100% RF CMOS
technology to bring digital low-IF radio technology to the
automotive receiver market. The Si474x receiver family
builds on Silicon Laboratories’ highly successful broadcast
audio radio products, offering design simplicity, unmatched
integration, programmability, and automotive quality and
reliability.
The Si474x receiver family supports world-wide FM bands
from 64–108 MHz and AM bands from 520–1710 kHz. The
Si474x supports AM/FM, weather band, shortwave, and
longwave radio bands. All odd-numbered part numbers in
the family support international RDS/RBDS protocols.
The Si474x family leverages Silicon Laboratories’ patented
digital architecture, delivering superior RF performance
and interference rejection. The proven digital radio
technology provides excellent sensitivity in weak signal
environments, and superb selectivity and inter-modulation
immunity in strong signal environments.
The solution offers programmable AM/FM channel spacing
and filters, auto-calibrated digital tuning, and proven
AM/FM seek functionality based on multiple signal quality
and band parameters. The family offers highly flexible and
advanced
audio
features
such
as
noise
blanking,
programmable soft mute, and multi-path detection and
mitigation.
The Si474x receiver system has a minimal bill of materials
requiring a small amount of board space. The high level of
integration provides a complete, tested broadcast audio
receiver that is ideal for primary automotive radio receivers.
Features
- Worldwide FM band support (64–108 MHz)
- Worldwide AM band support (520–1710 kHz)
- Shortwave, longwave support (Si4742/43/44/45 only)
- Weather band support (Si4742/43 only)
- Received signal quality indicators (RSSI, SNR, adjacent
channel, wideband AM)
- Multipath detection/mitigation
- AM and FM noise blankers (Si4742/43/44/45 only)
- AM and FM programmable seek tuning
- AM and FM programmable soft mute control
- AM and FM adjustable channel bandwidth filters
- FM stereo-mono blending
- FM Hi-Cut control (Si4742/43/44/45 only)
- Digital FM stereo decoder
- RDS/RBDS processor (Si4741/43/45 only)
- Automatic frequency control (AFC)
- Automatic gain control (AGC)
- Image rejection mixer
- Frequency synthesizer with integrated VCO
- Low-IF direct conversion with no ceramic filters
- Analog or digital (I2S) outputs
- 3.0 to 3.6 V supply voltage
- Programmable reference clock
- AECQ-100 certified
• –40 to 85 ºC operation
-
24-pin 4 x 4 mm QFN package
• Pb-free/RoHS compliant
Applications
- OEM automotive radio systems
- After-market automotive radio systems
- Automotive radio modules


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