SI4706 Datasheet, PDF (1/3 Pages) List of Unclassifed Manufacturers – Introducing High-Performance FM RDS Data Receiver ICs

Si4706
High-Performance FM RDS/RBDS Data Receiver
Description
The Si4706 is a 100% CMOS receiver integrated
circuit (IC), offering the full receive functionality from
antenna to RDS/RBDS data for use as a dedicated
data receiver. It is an ideal RDS/RBDS data receiver
for Traffic Message Channel (TMC) and Open Data
Applications (ODA) applications frequently used in
conjunction with GPS functionality. It offers a fully-
integrated decoder for the European RDS* and the
North American RBDS. It includes demodulation,
symbol decoding, advanced error correction, detailed
visibility to block-error rates (BLER), and decoder
reliability, synchronization status, and times. The
Si4706 provides complete, decoded, and error-
corrected RDS groups, up to 25 groups at a time in
four 16-bit registers.
The Si4706 incorporates a high performance RDS
decoder based on patented methodologies and
delivers excellent RDS sensitivity performance,
synchronization to RDS at high BLER levels, and
RDS data decoding with superior decoder reliability.
The Si4706 draws on Silicon Laboratories' broadcast
audio and corresponding patent portfolio using a
digital low intermediate frequency (low-IF) receiver
architecture proven by over 100 million broadcast
audio receivers shipped worldwide. The low-IF
architecture allows the Si4706 to deliver superior
performance while integrating the great majority of
external components required by competing
solutions.
The Si4706 is the first FM radio receiver integrated
circuit to support an embedded antenna, which can
be integrated into the enclosure or PCB of a portable
device. For portable navigation devices, the Si4706
embedded antenna feature permits integration of the
traffic messaging antenna into the enclosure of the
portable device and eliminates the need for external
antenna cables.
The Si4706 is feature-rich, providing both highly
automated performance, according to Silicon
Laboratories' recommended settings, and extensive
programmability and flexibility for customized system
performance.
*Note: The term “RDS” will be used to mean “RDS/
RDBS” throughout this document.
Features
- Worldwide FM band support 
(76–108 MHz)
- Advanced RDS decoding engine
- Unmatched RDS sensitivity
- Leading RDS synchronization metrics
- Highly reliable RDS decode
- RDS reception with FM mono broadcast
- Received signal quality indicators
- Supports integrated antenna
- Automatic gain control (AGC)
- Integrated FM LNA
- Image-rejection mixer
- Frequency synthesizer with integrated VCO
- Low-IF direct conversion with no external ceramic
filters
- 2.7 to 5.5 V supply voltage
- Programmable reference clock
- 20-pin 3 x 3 mm QFN package
- Pb-free/RoHS compliant
- Stereo audio OUT
- I²S Digital audio OUT
Applications
- Personal navigation devices (PND)
- Dedicated data receiver
- GPS-enabled portable devices
Headphone
Cable
FMI
RFGND
Integrated
Antenna
LPI
32.768 kHz _(TYP)
RCLK
2.7–5.5 V VDD
LNA
AGC
0/90
AFC
REG
XTAL
OSC
ADC
PGA
DSP
ADC
RSSI RDS
CONTROL
INTERFACE
Si4706
DAC
LOUT
DAC
ROUT
GPO
DCLK
DOUT
DFS
FM Data Receiver
Copyright © 2008 by Silicon Laboratories
03.17.08