SI47920 Datasheet, PDF (1/3 Pages) Silicon Laboratories – High-Performance Automotive AM/FM Radio Receiver

Si47920/21
High-Performance Automotive AM/FM Radio Receiver and
HD Radio™ 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)
- On-chip soft-decision RDS/RDBS demodulator/decoder
- AM/FM:
- Comprehensive AM/FM signal processing firmware
- Integrated active FM buffer for background/data
tuners
- Analog FM phase diversity with two, three or four
tuners (Si47921 Only)
- Fully integrated AGC for AM and FM inputs
- HD Radio (Si47921 Only):
- Digital I/Q interface to HD Radio Processor
- AM/FM HD Radio IBOC blend
- Fast FM HD Radio band scan
- Audio:
- HiFi2-EP Audio-DSP with 288 kB for program and
data memory
- Seven analog audio inputs
- Four analog audio outputs
- Five digital audio ports (I²S)
- Up to 24 synchronous or asynchronous sample 
rate converters
- Multi-channel audio reference
- design
- Frequency synthesizer with fully
- integrated PLL-VCO
- Integrated clock oscillator
- 1.8 V or 3.3 V digital power supply
- 3.3 V analog and 1.8 V digital
- power supplies
- QFN 84-pin, 12x12x0.85 mm
- Pb-free/RoHS compliant
- AEC-Q100 qualified
Description
The Si47920/21 integrates AM/FM radio receiver with
audio processing. The analog AM/FM receiver sets a new
standard for automotive broadcast reception. The
integrated audio processing sub-system enables to
synchronize, process, aggregate and distribute all digital
and analog audio signals in the head-unit.
The Si47920/21 is the most integrated monolithic IC in the
industry with the smallest external bill of materials.
Si47920/21 based systems can scale from low-cost single
tuner AM/FM radio to highest performance systems with
multiple tuners and multiple antennas, enabling the radio
suppliers to reuse their R&D across multiple product lines,
all with a common software API. The Si47920/21 meets
rigorous automotive quality standards.
Applications
- Automotive OEM infotainment systems
- Aftermarket car radio systems
CLKO
XTALO
XTALI
FMI
FMO
AMVAG
AMI
AGC
AGC
LNA
LNA
Power
supplies
Audio
Input
Port 0
Audio
Input
Port 1
Audio
Input
Port 2
Data
RAM
Program
RAM
Audio HUB +
Audio DSP
(Hi-Fi2 EP)
Audio
Output
Port 0
Audio
Output
Port 1
IF AGC
ADC
ADC
Radio DSP
ARM
Cortex M3
DOUT0
DCLK0
DFS0
DOUT1
DCLK1
DFS1
DEBUGP
DEBUGN
ISFSP
ISFSN
ZIFIOUT
ZIFCLK
ZIFQOUT
ZIFFS
Flash
Interface
SPI/I²C
7:4 Mux
Si47920/21
Copyright © 2015 by Silicon Laboratories
3.12.2015