Si4706-D50
HIGH-PERFORMANCE FM AND RDS/RBDS RECEIVER
Features
Worldwide FM band support Automatic gain control (AGC)
(76108 MHz)
Integrated FM LNA
Advanced patented RDS/RBDS
Image-rejection mixer
decoding engine
Frequency synthesizer with
Lowest power consumption integrated VCO
Outstanding RDS sensitivity, Low-IF direct conversion with no
synchronization, and reliability
external ceramic filters
Received signal quality indicators
2.7 to 5.5 V supply voltage
Ordering Information:
On-chip tuned resonance for
Dual 1.8 and 2.7 V power supplies
See page 29.
embedded antenna support
Stereo audio out
Multipath detection and mitigation
2
I S Digital audio out
FM Hi-cut control
20-pin 3 x 3 mm QFN package
Pin Assignments
Advanced FM stereo-mono blend
Pb-free/RoHS compliant
Si4706-GM
Applications
(Top View)
Cellular handsets Personal navigation devices (PND)
Portable media devices GPS-enabled handsets and portable
devices
Dedicated data receiver
20 19 18 17
NC 1 16
Description
FMI 2 15 DOUT
The Si4706-D50 FM/RDS/RDBS receiver provides the highest performance and
RFGND 3 14 LOUT
GND
lowest power consumption available for portable devices today. The 100% CMOS
4 PAD 13
LPI ROUT
IC integrates the complete FM and data receiver function from antenna to analog
RST 5 12 GND
or digital audio and data out in a single 3 x 3 mm 20-pin QFN.
6 11 VA
7 8 9 10
Functional Block Diagram
Half-wavelength
Si4706
antenna
This product, its features, and/or its
FMI
ADC DAC
LOUT
architecture is covered by one or
Embedded
antenna LNA
PGA DSP
more of the following patents, as well
LPI
ADC DAC as other patents, pending and
ROUT
RFGND
issued, both foreign and domestic:
AGC
GPO
7,127,217; 7,272,373; 7,272,375;
0/90
DCLK 7,321,324; 7,355,476; 7,426,376;
32.768 kHz
(TYP)
RSSI RDS
7,471,940; 7,339,503; 7,339,504.
RCLK
DOUT
AFC
CONTROL DFS
2.75.5 V
VA
INTERFACE
XTAL
REG
OSC
Rev. 1.0 7/10 Copyright 2010 by Silicon Laboratories Si4706-D50
SEN
SCLK
SDIO
RST
VD
DIGITAL INTERFACE
SEN
NC
SCLK
SDIO GPO1
RCLK GPO2/INT
VD GPO3/DCLK
DFSSi4706-D50
2 Rev. 1.0