Document
Si4730/31/34/35-D60
BROADCAST AM/FM/SW/LW RADIO RECEIVER
RCLK SEN
SCLK SDIO RST
Features
Worldwide FM band support
Seven selectable AM channel filters
(64–108 MHz)
AM/FM/SW/LW digital tuning
Worldwide AM band support
EN55020 compliant
(520–1710 kHz)
No manual alignment necessary
SW band support (Si4734/35)
Programmable reference clock
(2.3–26.1 MHz)
Adjustable soft mute control
LW band support (Si4734/35)
RDS/RBDS processor (Si4731/35)
(153–279 kHz)
Digital audio out
Excellent real-world performance 2-wire and 3-wire control interface
Integrated VCO
Integrated LDO regulator
Advanced AM/FM seek tuning
Wide range of ferrite loop sticks and
Automatic frequency control (AFC)
air loop antennas supported
Automatic gain control (AGC)
QFN and SSOP packages
Digital FM stereo decoder
RoHS compliant
Programmable de-emphasis
Advanced Audio Processing
Applications
Table and portable radios Mini/micro systems CD/DVD and Blu-ray players Stereo boom boxes
Description
Modules for consumer electronics Clock radios Mini HiFi and docking stations Entertainment systems
The Si473x-D60 digital CMOS AM/FM radio receiver IC integrates the complete broadcast tuner and receiver function from antenna input to digital audio output. The device leverages the Silicon Labs broadcast proven digital low-IF architecture, enabling a cost-effective, digital audio platform for consumer electronic applications with high TDMA noise immunity, superior radio performance, and high fidelity audio power amplification.
Functional Block Diagram
FM / SW ANT
FMI
AM / LW ANT
AMI RFGND
2.7~5.5 V (QFN) 2.0~5.5 V (SSOP) VA
+ GND
LNA AGC
LNA AGC LDO
Mux Mux
Si473x-D60
RDS (S i4 7 3 1 /
35)
LOW -IF
D IG ITA L A U D IO
DOUT DFS G P O /D C L K
ADC
DAC
DSP
ADC
DAC
ROUT LOUT
AFC
CONTROL IN T E R F A C E
VD 1.62 - 3.6 V
Ordering Information: See page 31.
Pin Assignments
Si473x-D60 (QFN)
NC GPO1 GPO2/[INT] GPO3/[DCLK] DFS
NC 1 20 19 18 17 16
FMI 2
15 DOUT
RFGND 3 AMI 4
GND PAD
14 LOUT/[DFS] 13 ROUT/[DOUT]
RST 5
12 GND
6 7 8 9 10 11 VA
SEN SCLK SDIO RCLK
VD
Si473x-D60(SSOP)
DOUT DFS
GPO3/[DCLK] GPO2/[INT] GPO1 NC NC FMI RFGND NC NC AMI
1 2 3 4 5 6 7 8 9 10 11 12
24 LOUT/[DFS] 23 ROUT/[DOUT] 22 DBYP 21 VA 20 VD 19 RCLK 18 SDIO 17 SCLK 16 SEN 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. 1.2 8/13
Copyright © 2013 by Silicon Laboratories
Si473x-D60
Si4730/31/34/35-D60
2 Rev. 1.2
TABLE OF CONTENTS
Si4730/31/34/35-D60
Section
Page
1. Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
2. Typical Application Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 2.1. QFN Typical Application Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 2.2. SSOP Typical Application Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3. Bill of Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 3.1. QFN/SSOP Bill of Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4. Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 4.1. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 4.2. Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 4.3. FM Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22 4.4. AM Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22 4.5. SW Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 4.6. LW Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22 4.7. Digital Audio Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 4.8. Stereo Audio Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 4.9. Received Signal Qualifiers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 4.10. Volume Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 4.11. Stereo DAC . . . . . ..