SI4703-B17 Datasheet, PDF (1/42 Pages) Silicon Laboratories – Seek tuning

Si4703-B17
BROADCAST FM RADIO TUNER FOR PORTABLE APPLICATIONS
Features
 This data sheet applies to
 Adaptive noise suppression
Si4703 Firmware 17 and greater _{ Volume control}
 Worldwide FM band support
 Line-level analog output
(76–108 MHz)
 Digital low-IF receiver
s _{ Frequency synthesizer with}
n _{integrated VCO}
ig ^{ Seek tuning}
s ^{ Automatic frequency control (AFC)}
 Automatic gain control (AGC)
e _{ Excellent overload immunity}
D _{ Signal strength measurement}
 Programmable de-emphasis
w (50/75 µs)
 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
e _Applications
N _{ Cellular handsets}
r _{ MP3 players}
fo ^{ Portable radios}
Description
 USB FM radio
 PDAs
 Notebook PCs
 Portable navigation
 Automotive
 Consumer electronics
ed ^{The Si4703 integrates the complete tuner function from antenna input to}
stereo audio output for FM broadcast radio reception.
nd _{Functional Block Diagram}
Ordering Information:
See page 35.
Pin Assignments
(Top View)
Si4703-GM
NC 1 20 19 18 17 16
FMIP 2
15 GND
RFGND 3
GND 4
GND
PAD
14 LOUT
13 ROUT
RST 5
12 GND
67
8
9 10 _{11 VD}
e _Headphone
m _Cable
FMIP
om ^{RFGND LNA}
Si4703
I
ADC
DSP
DAC
LOUT
PGA
FILTER
DEMOD
Q
ADC
MPX
AUDIO
DAC
ROUT
ec _AGC
0 / 90
R ^{32.768 kHz}
t ^{RCLK TUNE}
AFC
o _{2.7–5.5 V VA}
N^{VD REG}
XTAL
OSC
LOW-IF GPIO
RDS
RSSI
GPIO
VIO
RST
SDIO
SCLK
SEN
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.
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).