SI4831-B30-GU Datasheet, PDF (1/20 Pages) Silicon Laboratories – BROADCAST MECHANICAL TUNING AM/FM/SW RADIO RECEIVER

Si4831/35-B30
BROADCAST MECHANICAL TUNING AM/FM/SW RADIO RECEIVER
Features
 Worldwide FM band support
(64–109 MHz)
 Worldwide AM band support
(504–1750 kHz)
 SW band support (Si4835 only)
(5.6–22 MHz)
 Excellent real-world performance
 EN55020-compliant
 No manual alignment necessary
 Flexible band selections
Applications
 Table and portable radios
 Stereos
 Mini/micro systems
 CD/DVD players
 Boom boxes
Description
 Automatic frequency control (AFC)
 Integrated LDO regulator
 2.0 to 3.6 V supply voltage
 Wide range of ferrite loop sticks and air
loop antennas supported
 24-pin SSOP
 RoHS-compliant
 Supports station and stereo LED
indicators
 Direct volume control
 Bass and treble tone control
 Modules
 Clock radios
 Mini HiFi
 Entertainment systems
The Si4831/35-B30 is the 2nd generation mechanical-tuned digital CMOS
AM/FM/SW radio receiver IC that integrates the complete receiver function from
antenna input to audio output. Like other successful audio products from Silicon
Labs, Si4831/35-B30 offers unmatched integration and PCB space savings with
minimum external components and a small board area. The Si4831/35-B30
requires a simple application circuit and removes any requirements for manually
tuning components during the manufacturing process. The Si4831/35-B30 is a
very simple product to design, manufacture, and support across multiple product
lines. The receiver has very low power consumption, runs off two AAA batteries,
and delivers the performance benefits of digital tuning to the analog radio market.
Functional Block Diagram
AM
ANT
FM/SW
ANT
AMI
RFGND
FMI
LNA
AGC
0/90
XTALI
2.0~3.6V VDD1/2
AFC
REG
XTAL
OSC
S^Si4ⁱ⁴8⁸3³0^1//³3⁵4
ADC
DAC
LOUT
DSP
ADC
DAC
ROUT
ADC
CONTROL
INTERFACE
TUNE 1/2
BAND
Ordering Information:
See page 13.
Pin Assignments
Si4831/35-B30 (SSOP)
STEREO 1
STATION 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
VOL-/BASS
16 VOL+/TREBLE
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 1/11
Copyright © 2011 by Silicon Laboratories
Si4831/35-B30