SI4704-D50 Datasheet, PDF (1/34 Pages) Silicon Laboratories – BROADCAST FM RADIO RECEIVER FOR CONSUMER

Si4704/05-D50
BROADCAST FM RADIO RECEIVER FOR CONSUMER
ELECTRONICS
Features
 Worldwide FM band support
(64–108 MHz)
 RDS/RBDS decoding engine
(Si4705 only)
 Lowest power consumption
 Received signal quality indicators
 On-chip tuned resonance for
embedded antenna support
 Multipath detection and mitigation
 FM Hi-cut control
 Advanced FM stereo-mono blend
 Advanced audio processing
 Not EN 55020 compliant*
 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
*Note: *For consumer electronics applications that require EN 55020 compliance,
use Si4704/05-D60.
Ordering Information:
See page 27.
Pin Assignments
Si4704/05-GM
(Top View)
Applications
 Cellular handsets
 Portable media devices
 Dedicated data receiver
 Personal navigation devices (PND)
 GPS-enabled handsets and portable
devices
Description
The Si4704/05-D50 FM/RDS/RDBS receivers provide 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.
Functional Block Diagram
FM Antenna
FMI
RFGND
LPI
32.768 kHz _(TYP)
RCLK
2.7–5.5 V ^VA
LNA
AGC
AFC
REG
0/90
XTAL
OSC
Si4704/05
ADC
DAC
PGA
DSP
ADC
DAC
LOUT
ROUT
RSSI
RDS
(Si4705)
CONTROL
INTERFACE
GPO
DCLK
DOUT
DFS
NC 1 ^{20 19 18 17} 16
FMI 2
15 DOUT
RFGND 3
LPI 4
GND
PAD
14 LOUT
13 ROUT
RST 5
12 GND
6 _{7 8 9 10} 11 VA
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.
Rev. 1.0 12/10
Copyright © 2010 by Silicon Laboratories
Si4704/05-D50