Description
The Si4710/11 is the industry's first 100% CMOS FM
transmitter single chip IC. The device leverages
Silicon Labs’ highly successful and proven Si4700/01
FM receiver, and offers unmatched integration and
performance allowing FM transmit to be added to any
portable device by using a single chip. As with the
Si4700/01, the Si4710/11 offers industry leading size,
performance, low power consumption, and ease of
use.
The Si4710/11’s digital integration reduces the
required external components of traditional offerings,
resulting in a solution requiring only an external
inductor and bypass capacitor, and PCB space of
approximately 15 mm
manufacturing, improved quality, easy design-in, and
software programmability are key advantages of the
Si4710/11.
The Si4711 supports the European Radio Data
System (RDS) and the US Radio Broadcast Data
System (RBDS) standards including all the symbol
encoding, block synchronization, and error correction
functions. Using this feature, the Si4711 enables data
such as artist name and song title to be transmitted
to an RDS/RBDS receiver.
Users are responsible for adjusting their system’s
radiated power levels to comply with local regulations
on RF transmission (FCC, ETSI, ARIB, etc.).
FM Tuner
2.7–5.5 V
22 nF
C1
GND
DFS
VDD
DIN
RIN
LIN
2
. High reliability in device
LDO
RDS ( S i4711 )
ADC
ADC
FM Radio Transmitter for Portable Applications
Copyright © 2008 by Silicon Laboratories
GPO
DIGITAL
AUDIO
DSP
INTERFACE
CONTROL
Features
- Worldwide FM band support
- Requires only two external components
- Frequency synthesizer with integrated VCO
- Digital stereo modulator
- Programmable pre-emphasis
- Analog/digital audio interface
- Programmable reference clock
- RDS/RBDS transmit encoder (Si4711 only)
- PCB loop antenna support with self calibrated
- Programmable transmit level
- Programmable modulation
- 2.7 to 5.5 V supply voltage
- Digital gain compression
- Integrated LDO regulator
- 3 x 3 x 0.55 mm 20-pin QFN
Applications
- Cellular handsets/hands-free
- MP3 players
- Portable audio/video players
- Wireless speakers/microphone
- Satellite digital audio radios
- Personal computers/notebooks
DAC
DAC
(76–108 MHz) for transmit
(50/75 µs)
capacitor tuning
-
Pb-free and RoHS Compliant
Si4710/11
AFC
Si4710/11
TXO
RFGND
120 nH
L1
4.3.08
Tx
Ant