Rev. 1.1 2/08
Copyright ?2008 by Silicon Laboratories
Si4710/11
Si4710/11-B30
Si4710/11-B30 FM RADIO TRANSMITTER
Features
Applications
Description
The Si4710/11 integrates the complete transmit functions for standards-
compliant unlicensed FM broadcast stereo transmission. Users must
comply with local regulations on radio frequency (RF) transmission.
Functional Block Diagram
n  Integrated receive power
measurement
n   Worldwide FM band support
(76108 MHz)
n   Requires only two external
components
n   Frequency synthesizer with
integrated VCO
n   Digital stereo modulator
n   Programmable pre-emphasis
n   Analog/digital audio interface
n   Audio silence detector
n   Programmable reference clock
n   RDS/RBDS encoder (Si4711 only)
n   PCB loop and stub antenna
support with self-calibrated
capacitor tuning
n   Programmable transmit level
n   Audio dynamic range control
n   Advanced modulation control
n   2.7 to 5.5 V supply voltage
n   Integrated LDO regulator
n   3 x 3 x 0.55 mm 20-pin QFN
l Pb-free and RoHS Compliant
n   Designed for compatibility with
cellular operation
n   Cellular handsets/hands-free
n   MP3 players
n   Portable media players
n   Wireless speakers/microphone
n   Satellite digital audio radios
n   Personal computers/notebooks
ADC
ADC
Si4710/11
DSP
DAC
DAC
CONTROL
INTERFACE
GPO
RDS (Si4711 )
LDO
VDD
GND
2.75.5 V
C1
22 nF
LIN
RIN
Tx
Ant
TXO
DIN
DFS
AFC
L1
120 nH
RFGND
DIGITAL
AUDIO
Patents pending
Note:  To ensure proper operation and
performance, follow the guide-
lines    in    AN383:    Universal
Antenna Selection and Layout
Guidelines. Silicon Laboratories
will evaluate schematics and lay-
outs for qualified customers.
Ordering Information:
See page 32.
Pin Assignments
GND
PAD
1
2
3
17
18
19
20
11
12
13
14
6
7
8
9
4
5
16
10
15
RIN
DFS
DIN
GND
RST
NC
TXO
VDD
NC
RFGND
Si4710/11
(Top View)