SI4712 Datasheet, PDF (1/3 Pages) Silicon Laboratories – FM Radio Transmitter with Receive Power Scan

Si4712/13
FM Radio Transmitter with Receive Power Scan
Description
The Si4712/13 is the industry's first 100% CMOS FM
radio transmitter with an integrated receiver to
measure receive signal strength. 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 Si4712/13 offers
industry leading size, performance, low power
consumption, and ease of use.
The Si4712/13’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
Si4712/13.
The Si4713 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 Si4713 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.).
Features
- Integrated receiver for receive power measurement
- 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 (Si4713 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
Si4712/13
Tx
Ant
TXO
L1
120 nH _RFGND
PEAK
DETECT
DIGITAL
DIN
AUDIO
DFS
DSP
DAC
ADC
LIN
DAC
ADC
RIN
VDD 2.7–5.5 V
AFC
CONTROL
INTERFACE
GPO
RDS (Si4713)
LDO
GND C1
22 nF