Confidential Rev. 1.0 1/07 Copyright © 2007 by Silicon Laboratories Si4703-B17
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).
N
ot R
ec
omm
ended
for New
D
es
igns
Si4703-B17
BROADCAST FM RADIO TUNER FOR PORTABLE APPLICATIONS
Features
Applications
Description
The Si4703 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
Si4703 Firmware 17 and greater
Worldwide FM band support
(76–108 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
Integrated crystal oscillator
Cellular handsets
MP3 players
Portable radios
USB FM radio
PDAs
Notebook PCs
Portable navigation
Automotive
Consumer electronics
VIO
CONTROLLER
I
ADC
Q
ADC
Si4703
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
XTAL
OSC
Patents pending
Notes:
1. To ensure proper operation and FM
receiver performance, follow the
guidelines in “AN231: Si4700/01/02/03
Headphone and Antenna Interface.”
Silicon Laboratories will evaluate
schematics and layouts for qualified
customers.
2. Place Si4703 as close as possible to
antenna jack and keep the FMIP trace
as short as possible.
Ordering Information:
See page 35.
Pin Assignments
(Top View)
Si4703-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
Si4703-B17
2 Confidential Rev. 1.0
N
ot R
ecom
m
ende
d for N
ew D
esi
gns
Si4703-B17
Confidential Rev. 1.0 3
TABLE OF CONTENTS
Section Page
1. Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
2. Typical Application Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
3. Bill of Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
4. Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
4.1. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
4.2. FM Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
4.3. General Purpose I/O Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
4.4. RDS/RBDS Processor and Functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
4.5. Stereo Audio Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
4.6. Tuning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
4.7. Reference Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
4.8. Control Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
4.9. Reset, Powerup, and Powerdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
4.10. Audio Output Summation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
4.11. Initialization Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
4.12. Programming Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
5. Register Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
6. Register Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
7. Pin Descriptions: Si4703-GM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
8. Ordering Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
9. Package Markings (Top Marks) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
9.1. Si4703 Top Mark . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
9.2. Top Mark Explanation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
10. Package Outline: Si4703-GM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
11. PCB Land Pattern: Si4703-GM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
Additional Reference Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

SI4703-B17-GM

Mfr. #:
Manufacturer:
Silicon Labs
Description:
Tuners FM receiver with RDS
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet