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Si4840/44-A10
B R O A D C A S T A N A L O G T UN I N G D I G I TA L D IS PLAY A M/ FM / S W
R A D I O R E C E IV E R
Features
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Worldwide FM band support
(64–109 MHz)
Worldwide AM band support
(504–1750 kHz)
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Minimal BOM components with no
manual alignment
Excellent real-world performance
Automatic frequency control (AFC)
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SW band support (Si4844 only)
(2.3–28.5 MHz)
Selectable support for all AM/FM
regional bands
2-wire control interface
Mono/Stereo and valid station
indicator
Digital volume support
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EN55020 compliant
Two AAA batteries with 2.0 to 3.6 V
supply voltage (T = 25 °C)
Wide range of ferrite loop sticks and
air loop antenna support
24-pin SSOP package
RoHS compliant
Ordering Information:
See page 20.
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Bass/Treble support
Applications
Pin Assignments
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Table and portable radios
Stereos
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Modules for consumer electronics
Entertainment systems
Si4840/44-A10 (SSOP)
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Mini/micro systems
Boom boxes
Clock radios
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Toys, lamps, and any application
needing an AM/FM radio
Mini HiFi
iPhone docking
LNA_EN
IRQ
TUNE1
TUNE2
1
2
3
4
24
23
22
21
LOUT
ROUT
DBYP
VDD2
Description
The Si4840/44 is the first analog-tuned digital-display digital CMOS AM/FM/SW
radio receiver IC that integrates the complete receiver function from antenna input
to audio output. Working with Host MCU (I 2 C-compatible 2-wire control interface),
frequencies, and stereo/mono information can be displayed on LCD, while the
analog-tune features are kept. Leveraging Silicon Laboratories' proven and
patented digital low intermediate frequency (low-IF) receiver architecture, the
BAND
NC
NC
FMI
RFGND
NC
NC
AMI
5
6
7
8
9
10
11
12
20
19
18
17
16
15
14
13
VDD1
XTALI
XTALO
SCLK
SDIO
RST
GND
GND
Si4840/44 deliver superior RF performance and interference rejection. The
superior control algorithm integrated in Si4840/44 provides easy and reliable
control interface while eliminating all the manual tuned external components used
in traditional solution.
Functional Block Diagram
This product, its features, and/or its
architecture is covered by one or more of
the following patents, as well as other
patents, pending and issued, both
foreign and domestic: 7,127,217;
AM
ANT
AMI
RFGND
LNA
ADC
DSP
Si484x
Si4830/34
DAC
LOUT
7,272,373; 7,272,375;
7,355,476; 7,426,376;
7,339,503; 7,339,504.
7,321,324;
7,471,940;
ADC
DAC
ROUT
FM
ANT
FMI
AGC
0/90
TUNE1/2
ADC
XTALI
2.0~3.6V VDD1/2
AFC
REG
XTAL
OSC
CONTROL INTERFACE
BAND
Rev.1.0 8/11
Copyright ? 2011 by Silicon Laboratories
Si4840/44-A10
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相关代理商/技术参数
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