Si4706-D50
HIGH-PERFORMANCE FM AND RDS/RBDS RECEIVER
Features
Worldwide FM band support
(76–108 MHz)
Advanced patented RDS/RBDS
decoding engine
Lowest power consumption
Outstanding RDS sensitivity,
synchronization, and reliability
Received signal quality indicators
On-chip tuned resonance for
embedded antenna support
Multipath detection and mitigation
FM Hi-cut control
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
Dual 1.8 and 2.7 V power supplies
Stereo audio out
I2S Digital audio out
20-pin 3 x 3 mm QFN package
Pb-free/RoHS compliant
Ordering Information:
See page 29.
Pin Assignments
Advanced FM stereo-mono blend
Si4706-GM
(Top View)
Applications
Cellular handsets
Portable media devices
Dedicated data receiver
Personal navigation devices (PND)
GPS-enabled handsets and portable
devices
20 19 18 17
NC
FMI
1
16
Description
2
15 DOUT
14 LOUT
13 ROUT
12 GND
11 VA
The Si4706-D50 FM/RDS/RDBS receiver provides the highest performance and
lowest power consumption available for portable devices today. The 100% CMOS
IC integrates the complete FM and data receiver function from antenna to analog
or digital audio and data out in a single 3 x 3 mm 20-pin QFN.
RFGND
LPI
3
4
5
GND
PAD
RST
6
7
8
9
10
Functional Block Diagram
Half-wavelength
antenna
Si4706
This product, its features, and/or its
architecture is covered by one or
more of the following patents, as well
as other patents, pending and
issued, both foreign and domestic:
7,127,217; 7,272,373; 7,272,375;
7,321,324; 7,355,476; 7,426,376;
7,471,940; 7,339,503; 7,339,504.
FMI
ADC
ADC
DAC
LOUT
ROUT
Embedded
antenna
LNA
AGC
PGA
DSP
LPI
DAC
RFGND
GPO
0/90
DCLK
DOUT
DFS
32.768 kHz
(TYP)
RCLK
RSSI
RDS
AFC
REG
CONTROL
INTERFACE
2.7–5.5 V
VA
XTAL
OSC
Rev. 1.0 7/10
Copyright © 2010 by Silicon Laboratories
Si4706-D50