Rev. 0.6 7/09 Copyright © 2009 by Silicon Laboratories Si4702/03-D30
This information applies to a product under development. Its characteristics and specifications are subject to change without notice.
Silicon Laboratories Confidential. Information contained herein is covered under non-disclosure agreement (NDA).
Si4702/03-D30
BROADCAST FM RADIO TUNER FOR PORTABLE APPLICATIONS
Features
Applications
Description
The Si4702/03 integrates the complete tuner function from antenna input
to stereo audio output for FM broadcast radio reception.
Functional Block Diagram
This data sheet applies to
Si4702/03-D Firmware 30 and
greater
Worldwide FM band support
(64–108 MHz)
Digital low-IF receiver
Frequency synthesizer with
integrated VCO
Seek tuning
Automatic frequency control (AFC)
Automatic gain control (AGC)
Excellent overload immunity
Signal strength measurement
Programmable de-emphasis
(50/75 µs)
Adaptive noise suppression
Volume control
Line-level analog output
32.768 kHz reference clock
2-wire and 3-wire control
interface
2.7 to 5.5 V supply voltage
Integrated LDO regulator
allows direct connection to
battery
3 x 3 mm 20-pin QFN package
Pb-free/RoHS compliant
RDS/RBDS Processor (Si4703)
Integrated crystal oscillator
Cellular handsets
MP3 players
Portable radios
USB FM radio
PDAs
Notebook PCs
Portable navigation
Consumer electronics
VIO
CONTROLLER
I
ADC
Q
ADC
Si4702/03
DSP
FILTER
DEMOD
MPX
AUDIO
SCLK
SDIO
CONTROL
INTERFACE
SEN
DAC
DAC
ROUT
LOUT
0 / 90 LOW-IF
RSSI
TUNE
GPIO
AMPLIFIER
GPIO
RST
RFGND
LNA
FMIP
AFC
AGC
PGA
RCLK
REG
VA
VD
32.768 kHz
2.7–5.5 V
Headphone
Cable
RDS
(Si4703)
XTAL
OSC
U.S. and International
Patents Pending
Abbreviated U.S. patent list:
7272375, 7127217, 7272373,
7272374, 7321324, 7339503,
7339504, 7355476, 7426376,
7436252, 7471940
Ordering Information:
See page 38.
Pin Assignments
(Top View)
Si4702/03-GM
GND
PAD
1
GPIO1
RCLK
GND
LOUT
ROUT
RST
NC
GND
SDIO
SCLK
GND
FMIP
RFGND
GPIO2
V
D
NC
GPIO3
V
IO
SEN
V
A
2
5
4
3
6
15
12
13
14
7 1098
11
17181920 16
Si4702/03-D30
2 Rev. 0.6
Si4702/03-D30
Rev. 0.6 3
TABLE OF CONTENTS
Section Page
1. Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
2. Typical Application Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
3. Bill of Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
4. Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
4.1. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
4.2. FM Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
4.3. General Purpose I/O Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
4.4. RDS/RBDS Processor and Functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
4.5. Stereo Audio Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
4.6. Tuning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
4.7. Reference Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
4.8. Control Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
4.9. Reset, Powerup, and Powerdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
4.10. Audio Output Summation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
4.11. Initialization Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
4.12. Programming Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
5. Register Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
6. Register Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
7. Pin Descriptions: Si4702/03-D30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
8. Ordering Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
9. Package Markings (Top Marks) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
9.1. Si4702 Top Mark . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
9.2. Si4703 Top Mark . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
9.3. Top Mark Explanation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
10. Package Outline: Si4702/03-D30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
11. PCB Land Pattern: Si4702/03-D30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
Additional Reference Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44

SI4703-D30-GM

Mfr. #:
Manufacturer:
Silicon Labs
Description:
RF RCVR FM 76MHZ-108MHZ 20QFN
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

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