SI4706-C30-GM Silicon Laboratories Inc, SI4706-C30-GM Datasheet - Page 17

• Manufacturer Part Number: SI4706-C30-GM
• Description: IC FM RADIO TUNER 20-QFN
• Manufacturer: Silicon Laboratories Inc
• Series: -r

Specifications of SI4706-C30-GM

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

4. Functional Description
4.1. Overview
The Si4706-C30 offers advanced audio processing plus
advanced RDS processing in a very small, 100%
CMOS receiver integrated circuit. The device provides
both analog and digital audio out, and a highly flexible
RDS pre-processor and 100 block RDS buffer. It is an
ideal product for handsets and portable devices seeking
to optimize both sound and data receiver performance.
For
unprecedented in portable devices. For RDS data
applications such as song-tagging, meta-data, traffic
message channel, or other open data applications, the
advanced and patented R(B)DS decoding engine offers
outstanding data synchronization and integrity. The
RDS engine includes demodulation, symbol decoding,
advanced error correction, detailed visibility to block-
error rates (BLER), advanced decoder reliability, and
synchronization status. The Si4706 provides complete,
decoded and error-corrected RDS groups (100 blocks),
up to 25 groups at a time. The Si4706 offers several
modes of operation for various applications which
require more or less visibility to the RDS status and
group data.
*Note: The term “RDS” will be used to mean “RDS/RBDS”
sound,
throughout the document.
32.768 kHz
2.7–5.5 V
the
Half-wavelength
antenna
advanced
Integrated
antenna
RFGND
RCLK
(TYP)
VDD
FMI
LPI
audio
Figure 9. Functional Block Diagram
LNA
AGC
REG
AFC
processing
XTAL
OSC
0/90
Rev. 1.0
is
PGA
The Si4706 receiver draws on Silicon Laboratories’
broadcast audio know-how and patent portfolio, using a
digital low intermediate frequency (low-IF) receiver
architecture proven by hundreds of millions of Silicon
Laboratories’
worldwide.
Silicon Labs has shipped 1/2 billion broadcast audio
receivers worldwide using this architecture. 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 digital integration reduces the required
external components of traditional offerings, resulting in
a solution requiring only an external bypass capacitor
and occupying board space of approximately 15 mm
The Si4706 is the first FM radio receiver IC to support
embedded antenna technology, allowing the FM
antenna to be integrated into the enclosure or PCB of a
portable device. For portable navigation devices, the
Si4706 embedded antenna feature permits integration
of the FM antenna into the enclosure of the device and
eliminates the need for external antenna cables. Refer
to “AN383: Si47XX Antenna, Schematic, Layout, And
Design Guidelines” for antenna design guidelines.
RSSI
ADC
ADC
INTERFACE
CONTROL
RDS
broadcast
DSP
DAC
DAC
Si4706
audio
Si4706-C30
receivers
LOUT
ROUT
GPO
DCLK
DOUT
DFS
shipped
2
.
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