Silicon Laboratories SI4730 User Manual

Broadcast am/fm radio receiver, Description, Features

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AM/FM Receiver

Copyright © 2010 by Silicon Laboratories

9.17.10

ADC

Si473x-D60

DSP

DAC

LOUT

ROUT

AFC

GPO/DCLK

LDO

VA

2.7~5.5 V (QFN)
2.0~5.5 V (SSOP)

RDS

(Si4731)

AMI

VD
1.62 - 3.6 V

SE

N

CONTROL

INTERFACE

SCLK

LNA

AGC

LNA

AGC

GND

ADC

M u x

M u x

DAC

LOW -IF

SDIO

RST

DIGITAL

AUDIO

DFS

DOUT

LIN

RIN

RC

LK

AM / LW

ANT

RFGND

FMI

FM / SW

ANT

+

Si4730/31-D60

Broadcast AM/FM Radio Receiver

Description

The Si4730/31 is the industry's first fully integrated, 100%
CMOS AM/FM radio receiver IC. The Si4730/31-D60 AM/
FM radio delivers excellent performance and is simple to
design-in. Available in a small 3 x 3 mm QFN package, the
Si4730/31 offers unmatched integration and PCB space
savings with a minimal number of external components
and no factory tuned components.

Leveraging Silicon Laboratories' proven and patented
digital receiver architecture, the Si4730/31 delivers
superior RF performance and interference rejection in both
AM and FM bands. The high integration and complete
system production test simplifies design-in, increases
system quality, and improves manufacturability.

The Si4730/31 solution includes advanced seek
algorithms, multipath detection and mitigation, adjustable
soft mute, FM hi-cut control, smart tune, and FM stereo
processing. In addition, the Si4730/31 provides an auxiliary
input to support a full digital system architecture.

The Si4730/31 utilizes digital processing to achieve high
fidelity, optimal performance, and design flexibility. The
chip provides excellent pilot rejection, selectivity, and
unmatched audio performance, and offers both the
manufacturer and the end-user extensive programmability
and flexibility in listening experience.

The Si4731-D60 incorporates an advanced digital
processor for the European Radio Data System (RDS) and
the North American Radio Broadcast Data System (RBDS)
including all required symbol decoding, block
synchronization, error detection, and error correction
functions. Using this feature, the Si4731 enables broadcast
data such as station identification and song name to be
displayed to the end user.

Features

-

Worldwide FM band support (64–108 MHz)

-

Worldwide AM band support (520–1710 kHz)

-

AM/FM digital tuning

-

EN55020 compliant

-

FM multipath detection and mitigation

-

FM hi-cut control

-

Advanced stereo blend

-

AUXIN stereo ADC

-

No manual alignment required

-

Seven selectable AM channel filters

-

Advanced AM/FM seek tuning

-

Programmable AVC max gain

-

Frequency synthesizer with integrated VCO

-

Automatic frequency control (AFC)

-

Programmable de-emphasis

-

Digital FM stereo decoder

-

Integrated LDO regulator

-

Wide range of ferrite and air loop antennas supported

-

Advanced FM RDS/RBDS processor

-

QFN and SSOP Pb-free/RoHS compliant package

Applications

-

Audio video receivers

-

Mini/micro systems

-

Home theater systems

-

Docking stations

-

Blu-ray / DVD players

-

Table / clock radios

-

Boomboxes

Pin Assignments

GND
PAD

1

2

3

17

18

19

20

11

12

13

14

6

7

8

9

4

5

16

10

15

GP

O

2/

IN

T

VIO

DIN

LOUT/DFS

ROUT/DOUT

GND

RST

NC

AMI

RCL

K

SD

IO

VDD

FMI

RFGND

GP

O

3/

D

C

LK

NC

GP

O

1

DF

S

SC

LK

SEN

Si473x (QFN)

Si473x (SSOP)

LOUT/[DFS]

ROUT/[DOUT]

DBYP

VD

GPO2/[INT]

GPO3/[DCLK]

DOUT/[RIN]

DFS/[LIN]

1

2

3

4

5

6

7

8

9

10

11

12

GPO1

VA

SDIO

NC

NC

RCLK

SEN

FMI

RFGND

SCLK

GND

NC

NC

RST

GND

AMI

24

23

22

21

20

19

18

17

16

15

14

13

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