SI47911 Datasheet, PDF (1/3 Pages) Silicon Laboratories – High-Performance Automotive AM/FM Radio Receiver

Si47911/12
High-Performance Automotive AM/FM Radio Receiver and
HD Radio™/DAB/DAB+/DMB/DRM Tuner with Audio System
Features
- Worldwide FM band support (64–108 MHz)
- Worldwide AM band support (520–1710 kHz)
- LW band support (144–288 kHz)
- SW band support (2.3–30 MHz)
- DAB/DAB+/DMB support (170–240 MHz, 
1452–1492 MHz) (Si47912 only)
- NOAA Weather Band support
- On-chip soft-decision RDS/RDBS demodulator/decoder
- AM/FM:
- Comprehensive AM/FM signal processing firmware
- Integrated active AM/FM buffers for background/data
tuners
- Analog FM phase diversity with two, three or four 
tuners
- Fully integrated AGC for AM and FM inputs
- HD Radio:
- Digital I/Q interface to HD Radio Processor
- HD Radio MRC with two, three, or four tuners
- AM/FM HD Radio IBOC blend
- Fast FM HD Radio band scan
- AEQ-Q100 qualified'
Description
The Si47911/12 integrates global radio receiver with audio
processing. The analog AM/FM receiver sets a new standard
for automotive broadcast reception. The integrated audio
processing sub-system provides a complete solution to
synchronize, process, aggregate and distribute digital and
analog audio signals in the head-unit.
The Si47911/12 is the most integrated monolithic IC in the
industry with the smallest external bill of materials. Si47911/12
based systems can scale from low-cost single tuner AM/FM
radio to the highest performance systems with multiple tuners
and multiple antennas, enabling radio suppliers to reuse R&D
across multiple product lines, all with a common software API.
The Si47911/12 meets rigorous automotive quality standards.
- DAB/DAB+/DMB (Si47912 only):
- Digital I/Q interface to DAB/DAB+/DMB processor
- DAB/DAB+/DMB MRC with two, three, or four tuners
- Integrated active Band III/L-band buffers for 
background/data tuners
- Fast DAB/DAB+/DMB band scan
- Fully integrated AGC for Band III and L-Band inputs
- Audio:
- HiFi2-EP Audio-DSP with 288 kB for program and data
memory
- Seven analog audio inputs
- Six analog audio outputs
- Seven digital audio ports (I²S) with TDM support
- Up to 24 synchronous or asynchronous sample rate
converters
- Frequency synthesizer with fully integrated PLL-VCO
- Integrated clock oscillator
- 1.8 V or 3.3 V digital IO power supplies
- 3.3 V analog power supply and 1.8 V digital power 
supply
- QFN 84-pin, 12x12x0.85 mm
- Pb-free/RoHS compliant
Applications
- Automotive OEM infotainment systems
- Aftermarket car radio systems
CLKO
XTALO
XTALI
LBI
LBO
AGC
LNA
B3I/WXI
B3O
AGC
LNA
FMI
FMO
AMVAG
AMI
AMO
AGC
AGC
LNA
LNA
Power
supplies
Audio
Input
Port 0
Audio
Input
Port 1
Audio
Input
Port 2
Audio
Input
Port 3
Program
RAM
Audio HUB +
Audio DSP
(Hi-Fi2 EP)
Data
RAM
IF AGC
ADC
ADC
Radio DSP
ARM
Cortex M3
Audio
Input
Port 4
Audio
Output
Port 0
Audio
Output
Port 1
DIN4
DICLK4
DIFS4
DOUT0
DCLK0
DFS0
DOUT1
DCLK1
DFS1
DEBUGP
DEBUGN
ISFSP
ISFSN
ZIFIOUT
ZIFCLK
ZIFQOUT
ZIFFS
Flash
Interface
SPI/I²C
7:5 Mux
Si47911/12
Copyright © 2015 by Silicon Laboratories
3.12.2015