SI4705-C40

Si4704/05-C40 B ROADCAST F M R ADIO R ECEIVER FOR C ON SUMER E LECTRONICS Features (64–108 MHz) Integrated antenna support EN55020 compliant Excellent real-world performance Freq synthesizer with integrated VCO Advanced FM seek tuning Automatic frequency control (AFC) Automatic gain control (AGC) Digital FM stereo decoder Minimal BOM Programmable de-emphasis            Adjustable soft mute control  RDS/RBDS processor (Si4705)  Optional digital audio out (Si4705)  2-wire and 3-wire control interface  Integrated LDO regulator  Signal quality measurements  2.7 to 5.5 V supply voltage  3x3 mm 20-pin QFN package  RoHS compliant ew LOUT ROUT GPO DCLK DOUT DFS Applications      rN d Table and portable radios Stereos Mini/micro systems CD/DVD players Boom boxes GPO3/DCLK VIO  GPO2/INT GPO1 de NC 1 FMI 2 RFGND 3 LPI 4 RST 5 6 SEN 20 19 18 17 16 15 DOUT Description The Si4704/05 integrates all functions required for an advanced broadcast FM radio receiver, from antenna input to stereo audio output. m en GND PAD 7 SCLK 8 SDIO 9 RCLK Functional Block Diagram FM Antenna FMI 10 11 VDD om Si4704/05 ADC PGA ADC DSP DAC DAC RFGND LNA ot 0/90 RSSI AFC RDS (Si4705) N 32.768 kHz RCLK VDD 2.7–5.5 V REG XTAL OSC SEN CONTROL INTERFACE SDIO Rev. 1.0 12/09 Copyright © 2009 by Silicon Laboratories VIO 1.85-3.6 V SCLK RST DIGITAL INTERFACE (Si4705) LPI AGC This product, its features, and/or its architecture is covered by one or more o...