SI4820-A10 Datasheet, PDF (1/20 Pages) Silicon Laboratories – BROADCAST MECHANICAL TUNING AM/FM/SW RADIO RECEIVER

Si4820/24-A10
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 (Si4824 only)
(5.6–22 MHz)
 No manual alignment necessary
 Mono audio output
 Selectable support AM/FM/SW
regional bands
Applications
 Table and portable radios
 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
 Direct volume control
 Not EN55020 compliant*
*Note: For consumer applications that
require EN 55020 compliance,
use Si4831/35-B.
 Modules
 Clock radios
 Mini HiFi
 Entertainment systems
The Si4820/24-A10 is the entry level mechanical-tuned digital CMOS AM/FM/SW
radio receiver IC that integrates the complete receiver function from antenna input
to audio output. The Si4820/24-A10 extends Silicon Laboratories multi-band tuner
family, and further increases the ease and attractiveness of design radio reception
to audio devices through small size and board area, minimum component count,
and superior, proven performance. The Si4820/24-A10 is drop-in replaceable to
the existing Si4831/35 tuner, requires a simple application circuit, and removes
any requirements for manually tuning components during the manufacturing
process. It 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
ANT
AMI
RFGND
FMI
XTALI
2.0~3.6V VDD1/2
LNA
AGC
0/90
AFC
REG
XTAL
OSC
Si4^S8ⁱ⁴3⁸²0⁰/^/23⁴4
ADC
DSP
DAC
AOUT
ADC
ADC
CONTROL INTERFACE
TUNE1/2
BAND
Ordering Information:
See page 14.
Pin Assignments
Si4820/24-A10 (SSOP)
LNA_EN
1
NC
2
TUNE1
3
TUNE2
4
BAND
5
NC
6
NC
7
FMI
8
RFGND
9
NC
10
NC
11
AMI
12
24
AOUT
23
NC
22
DBYP
21
VDD2
20
VDD1
19
XTALI
18
XTALO
17
VOL-
16
VOL+
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 11/11
Copyright © 2011 by Silicon Laboratories
Si4820/24-A10