SI4840-A10 Datasheet, PDF (1/26 Pages) Silicon Laboratories – BROADCAST ANALOG TUNING DIGITAL DISPLAY AM/FM/SW RADIO RECEIVER

Si4840/44-A10
BROADCAST ANALOG TUNING DIGITAL DISPLAY AM/FM/SW
RADIO RECEIVER
Features
 Worldwide FM band support
(64–109 MHz)
 Worldwide AM band support
(504–1750 kHz)
 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
 Bass/Treble support
Applications
 Table and portable radios
 Stereos
 Mini/micro systems
 Boom boxes
 Clock radios
Description
 Minimal BOM components with no
manual alignment
 Excellent real-world performance
 Automatic frequency control (AFC)
 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
 Modules for consumer electronics
 Entertainment systems
 Toys, lamps, and any application
needing an AM/FM radio
 Mini HiFi
 iPhone docking
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 (I²C-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
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
AM
ANT
FM
ANT
AMI
RFGND
FMI
XTALI
2.0~3.6V VDD1/2
LNA
AGC
0/90
AFC
REG
XTAL
OSC
Si4^S8ⁱ⁴3⁸0⁴/^x34
ADC
DAC
LOUT
DSP
ADC
DAC
ROUT
TUNE1/2
ADC
CONTROL INTERFACE
BAND
Ordering Information:
See page 20.
Pin Assignments
Si4840/44-A10 (SSOP)
LNA_EN
1
IRQ
2
TUNE1
3
TUNE2
4
BAND
5
NC
6
NC
7
FMI
8
RFGND
9
NC
10
NC
11
AMI
12
24
LOUT
23
ROUT
22
DBYP
21
VDD2
20
VDD1
19
XTALI
18
XTALO
17
SCLK
16
SDIO
15
RST
14
GND
13
GND
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;
7,272,373; 7,272,375; 7,321,324;
7,355,476; 7,426,376; 7,471,940;
7,339,503; 7,339,504.
Rev.1.0 8/11
Copyright © 2011 by Silicon Laboratories
Si4840/44-A10