AM/FM/SW Receiver

Copyright © 2011 by Silicon Laboratories

6.13.2011

Si4840/44

Broadcast Analog Tuning Digital Display AM/FM/SW Radio Receiver

Description

The Si4840/44 is the first analog-tuned digital-display

(ATDD) CMOS AM/FM/SW radio receiver IC that integrates

the complete receiver function from antenna input to audio

output. The Si4840/44 implements Silicon Labs' proven

low-IF digital architecture, providing an easy and reliable

control interface while eliminating all the manual tuned

external components used in traditional solutions. The

architecture also provides the industry's leading receiver

performance, with excellent sensitivity and selectivity in all

supported

bands.

The

Si4840/44

uses

a

simple

potentiometer to provide an analog-tuning interface, and

outputs the highly-accurate tuned frequency to a

control interface. The device supports industry-leading

features for band selection, Bass/Treble boost, European

EN 55020/22 and U.S. FCC compliance, and advanced

audio conditioning for all signal environments to remove

pops, clicks, and abrasive static. The device also supports

interrupts for valid tuned frequencies and stereo/mono

signal quality. These features provide a superb and highly

reliable user experience. Like other successful audio

products from Silicon Labs, the Si4840/44 offers

unmatched integration and PCB space savings with

minimum external components and small board area on a

single side PCB. The high integration and complete system

production test simplifies design-in, increases system

quality, and improves manufacturability. The receiver has

very low power consumption, runs off two AAA batteries,

and delivers the performance benefits of high performance

digital radio effect with digital display to the legacy analog-

tuned radio market.

Features

Applications

radio

Si4830/34

ADC

ADC

DSP

DAC

DAC

ROUT

LOUT

AFC

Si484x

RFGND

LNA

AMI

AGC

REG

VDD1/2

2.0~3.6V

XTAL

OSC

FMI

0/90

AM

ANT

FM

ANT

CONTROL

INTERFACE

TUNE1/2

BAND

XTALI

ADC