SI4710-B30 Datasheet, PDF (1/40 Pages) Silicon Laboratories – Si4710/11-B30 FM RADIO TRANSMITTER

Si4710/11-B30
Si4710/11-B30 FM RADIO TRANSMITTER
Features
 Integrated receive power
measurement
 Worldwide FM band support
(76–108 MHz)
 Requires only two external
components
 Frequency synthesizer with
integrated VCO
 Digital stereo modulator
 Programmable pre-emphasis
 Analog/digital audio interface
 Audio silence detector
 Programmable reference clock
 RDS/RBDS encoder (Si4711 only)
 PCB loop and stub antenna
support with self-calibrated
capacitor tuning
 Programmable transmit level
 Audio dynamic range control
 Advanced modulation control
 2.7 to 5.5 V supply voltage
 Integrated LDO regulator
 3 x 3 x 0.55 mm 20-pin QFN
Pb-free and RoHS Compliant
 Designed for compatibility with
cellular operation
Applications
 Cellular handsets/hands-free
 MP3 players
 Portable media players
 Wireless speakers/microphone
 Satellite digital audio radios
 Personal computers/notebooks
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
DFS
DIGITAL
Si4710/11
DIN
AUDIO
LIN
ADC
DAC
DSP
RIN
ADC
DAC
Tx
TXO
Ant
L1
RFGND ^{120 nH}
2.7–5.5 V VDD
C1 GND
LDO
GPO
RDS S( i4711 )
CONTROL
INTERFACE
AFC
22 nF
Ordering Information:
See page 32.
Pin Assignments
Si4710/11
(Top View)
NC 1 ^{20 19 18 17} 16
NC 2
15 RIN
RFGND 3
TXO 4
GND
PAD
14 DFS
13 DIN
RST 5
12 GND
6 _{7 8 9 10} 11 VDD
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.
Rev. 1.1 2/08
Copyright © 2008 by Silicon Laboratories
Si4710/11