Si4704/05-D50 BROADCAST FM RADIO RECEIVER FOR CONSUMER ELECTRONICS Features Worldwide FM band support Automatic gain control (AGC) (64108 MHz) Integrated FM LNA RDS/RBDS decoding engine Image-rejection mixer (Si4705 only) Frequency synthesizer with Lowest power consumption integrated VCO Received signal quality indicators Low-IF direct conversion with no On-chip tuned resonance for external ceramic filters embedded antenna support 2.7 to 5.5 V supply voltage Ordering Information: Multipath detection and mitigation Dual 1.8 and 2.7 V power supplies See page 26. FM Hi-cut control Stereo audio out 2 Advanced FM stereo-mono blend I S Digital audio out Advanced audio processing 20-pin 3 x 3 mm QFN package Pin Assignments Not EN 55020 compliant* Pb-free/RoHS compliant Si4704/05-GM *Note: *For consumer electronics applications that require EN 55020 compliance, (Top View) use Si4704/05-D60. Applications Cellular handsets Personal navigation devices (PND) 20 19 18 17 NC 1 16 Portable media devices GPS-enabled handsets and portable FMI 2 15 DOUT devices Dedicated data receiver RFGND 3 14 LOUT GND PAD LPI 4 13 ROUT Description RST 5 12 GND The Si4704/05-D50 FM/RDS/RDBS receivers provide the highest performance 6 11 VA 7 8 9 10 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 This product, its features, and/or its architecture is covered by one or FM Antenna more of the following patents, as well Si4704/05 as other patents, pending and ADC DAC FMI LOUT issued, both foreign and domestic: LNA PGA DSP RFGND 7,127,217 7,272,373 7,272,375 ADC DAC ROUT 7,321,324 7,355,476 7,426,376 AGC GPO 7,471,940 7,339,503 7,339,504. LPI 0/90 DCLK RDS 32.768 kHz (TYP) RSSI (Si4705) RCLK DOUT AFC CONTROL DFS VA 2.75.5 V INTERFACE XTAL REG OSC Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com Rev. 1.0 Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice November 1, 2021 SEN SCLK SDIO RST VD 1.623.6 V DIGITAL INTERFACE SEN NC SCLK SDIO GPO1 RCLK GPO2/INT VD GPO3/DCLK DFSSi4704/05-D50 TABLE OF CONTENTS Section Page 1. Electrical Specifications .3 2. Typical Application Schematic .14 3. Bill of Materials 15 4. Functional Description .16 4.1. Overview 16 4.2. FM Receiver .17 4.3. Stereo Audio Processing 17 4.4. Received Signal Qualifiers 17 4.5. De-emphasis .18 4.6. Volume Control .18 4.7. Stereo DAC 18 4.8. Soft Mute 18 4.9. FM Hi-Cut Control .18 4.10. Tuning .18 4.11. Seek 18 4.12. Digital Audio Interface .19 4.13. Embedded Antenna Support 21 4.14. RDS Decoder (Si4705 Only) 21 4.15. Reference Clock .21 4.16. Control Interface .22 4.17. GPO Outputs 23 4.18. Reset, Powerup, and Powerdown 23 4.19. Programming with Commands 23 5. Commands and Properties 24 6. Pin Descriptions: Si4704/05-GM 25 7. Ordering Guide 26 8. Package Markings .27 8.1. Si4704 Top Mark 27 8.2. Si4705 Top Mark 27 8.3. Top Mark Explanation 27 9. Package Outline: Si4704/05 28 10. PCB Land Pattern: Si4704/05 .29 11. Additional Reference Resources 31 Document Change List: .32 Contact Information 33 Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 2 Rev. 1.0 Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice November 1, 2021