Automotive AM/FM Tuner

Copyright © 2010 by Silicon Laboratories

11.16.10

LNA

REG

ROUT

LOUT/MPXOUT

INTB

RSTB

VIO

RFGND

AMI

FMI

FMO

RFREG

FMXI

FMAGC1

FMAGC2

Si475x

0°/90°

IF PKD

LNA

RDS

CNTRL

CIK

Gen

RF PKD

RF PKD

RF PKD

Si475x-A10

High Performance Automotive AM/FM Radio Receiver

Description

The Si475x radio receiver family employs RF CMOS

technology to bring outstanding radio receiver performance

and automotive quality to the automotive infotainment

industry. The Si475x family supports worldwide FM, AM,

shortwave, longwave, and weatherband radio reception.

The Si475x receiver system specifies a minimal bill of

materials,

resulting

in

a

very

small

board

space

requirement, making the solution ideal for any automotive

application from single tuner radios to multiple tuner radios

addressing companion TMC/AF reception/scanning.

The monolithic IC incorporates a digital signal processor

and

microcontroller,

leveraging

Silicon

Laboratories

patented

and

proven

low-IF

architecture,

delivering

superior RF performance and interference rejection, as

well as excellent sensitivity in weak signal environments

and superb selectivity and inter-modulation immunity in

strong signal environments. The device performs signal

conditioning with dynamic AM/FM channel bandwidth

control, a comprehensive set of weak signal processing

engines, auto-calibrated digital tuning, and proven AM/FM

seek functionality based on multiple signal quality and

band

parameters.

The

device

offers

world-class

performance for complete Radio Data Service (RDS)

decoding, synchronization, error detection and correction.

The device is also completely configurable, allowing raw

RDS data if so desired.

The part provides an integrated clock oscillator or accepts

interface.

Features

interference, frequency offset, adjacent channel strength

varactor banks

Applications