Si4682-A10
Single-Chip, FM/HD Radio Receiver
Description

Features

The Si4682 single-chip digital receiver is one member of a
family of 100% CMOS digital radio broadcast receiver ICs
from Silicon Labs. The Si468x family offers a complete and
cost-effective digital radio solution integrating the RF tuner,
baseband and audio processing on a single die. The high
level of integration provides significant customer benefits
compared to traditional digital radio solutions including a
reduction in system implementation complexity, validation
and testing, and improved reliability and manufacturability.
The Si4682 is compatible with the iBiquity Digital and
NRSC-5 standards for FM In-Band-On-Channel (IBOC)
digital radio broadcasting, integrating digital channel
demodulation and decoding functions, along with audio
decoding and IBOC analog-digital blend. The Si4682 is
capable of tuning HD Radio™ reception to cover additional
FM frequencies for future IBOC adoption outside of North
America. The Si4682 additionally supports IBOC
multicasting, as well as the full-range of HD Radio data
services, such as PSD (Program Service Data), Artist
Experience, iTunes® Tagging, Bookmark and real-time
traffic, with the appropriate external decoders.
The Si4682 additionally supports worldwide FM radio
reception and incorporates a fully integrated decoder for
the European Radio Data System (RDS) and the North
American Radio Broadcast Data System (RDBS) including
all required symbol decoding, block synchronization, error
detection, and error correction functions.
For more information, visit the Si468x Digital Radio
Receivers web page.

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Worldwide FM band support (76–108 MHz)
Advanced RDS/RBDS decoder
FM HD Radio™ support
Integrated IBOC blend
Advanced seek functionality
Advanced audio DSP processing
I2S digital audio out with ASRC
Integrated 97 dB stereo audio DAC
Concurrent I2S/L-R stereo audio out
Full range of signal quality metrics
Fully-integrated VCO / PLL / synthesizer
SPI and I2C host control interfaces
WLCSP 62-ball, 3.2x3.77x0.59 mm
QFN 48-pin, 7x7x0.85 mm

Applications
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Mobile phones and tablets
Clock and tabletop radios
Stereo boomboxes
Mini/micro systems
Docking stations
Personal navigation devices

Si4682-A10
RFREF
VHFI

ADC
LNA

DAC

LOUT

DAC

ROUT

I2S

DCLK
DFS
DOUT

Control

SCLK
SSB
MISO
MOSI

DSP
ADC

Copyright © 2013 by Silicon Laboratories

RSTB

FLASH
Interface

NVMOSI
NVMISO

VMEM

VCORE

VA

VIO
Digital Radio Receiver

XTALO

CLK
Gen

LDOs

NVSCLK
NVSSB

VHF SW

XTALI

VHFSW

RDS

INTB

AGC

05.07.2013