SI4710 Datasheet, PDF (1/2 Pages) Silicon Laboratories – FM Radio Transmitter for Portable Applications

Si4710/11
FM Radio Transmitter for Portable Applications
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 mm². High reliability in device
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) 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 to adjust their system’s
radiated power levels to comply with local regulations
on RF transmission (FCC, ETSI, ARIB, etc.).
Features
- Worldwide FM band support
(76–108 MHz) for transmit
- Requires only two external components
- Frequency synthesizer with integrated VCO
- Digital stereo modulator
- Programmable pre-emphasis
(50/75 µs)
- Analog/digital audio interface
- Programmable reference clock
- RDS/RBDS transmit encoder (Si4711 only)
- PCB loop antenna support with self calibrated
capacitor tuning
- 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
- Pb-free and RoHS Compliant
Applications
- Cellular handsets/hands-free
- MP3 players
- Portable audio/video players
- Wireless speakers/microphone
- Satellite digital audio radios
- Personal computers/notebooks
DFS
DIGITAL
DIN
AUDIO
LIN
ADC
DAC
DSP
RIN
ADC
DAC
2. 7– 5.5 V _VDD
C1 GND
22 nF
LDO
GPO
RDS (Si4711)
CONTROL
INTERFACE
Si471x
Tx
TXO
Ant
L1
120 nH
RFGND
AFC
FM Tuner
Copyright © 2007 by Silicon Laboratories
1.8.07