Si4704/05 Enhanced Broadcast FM Radio Receiver for Portable Applications Skyworks broadcast offerings including FM transmit, Description The Si4704/05 enhanced FM receiver is the most AM/FM/SW receive, weather band receive and SAME advanced portable solution available today offering decode, and unparalleled RDS data receivers. The embedded antenna support, digital audio out, worldwide complete solution, including a minimal BOM, requires less 2 FM band support, and highly flexible, mature, and proven than 15 mm board area, or less than half that of other FM functionality in a simple API. The Si4704/05 competing solutions. The Si4705 incorporates Skyworks incorporates Skyworks tuned-resonance antenna proven and widely adopted RDS processor, including technology for crystal clear FM reception in wire-free worldwide compliance, all symbol decoding, error device enclosures. Skyworks internationally patented detection, error correction, and other RDS functions. The tuned-resonance technology allows embedded FM Si4705 RDS functionality is unmatched in the industry for antennas such as PCB traces, loops, stubs, or other performance, on-chip processing, and worldwide adoption. devices to perform exceptionally well, enabling devices Features with integrated Bluetooth to receive FM transmissions - Worldwide FM band support (64~108 MHz) without an external FM antenna, and transmit the FM - Supports integrated antenna content to Bluetooth-enabled headsets. This is the best, - Digital low-IF receiver most cost-effective solution to enable wire-free FM - Excellent real-world performance reception. - Frequency synthesizer with integrated VCO The Si4705 also offers digital audio out for FM recording. - Seek tuning Content recorded over the Si4705 can be shared with - Automatic frequency control (AFC) friends or played at a later time in MP3 format. The content - Automatic gain control (AGC) can also be tagged with RDS information, allowing song name and artist labels to be displayed as is done with MP3 - Integrated LDO regulator meta data. Using the digital audio out, the Si4705 can also - Minimal BOM reduce total system power consumption by avoiding - Adjustable seek parameters unnecessary ADC/DAC conversions between the FM - Adjustable mono/stereo blend receiver and the host processor. - Adjustable soft mute The Si4704/05 truly supports worldwide FM bands, starting - RDS/RBDS decoder(Si4705 only) at 64 MHz for Eastern European countries and extending - Optional digital audio output (Si4705 only) all the way to 108 MHz for the rest of the world. The device - Programmable de-emphasis(50/75us) supports channel spacing down to 10 kHz, and includes - Programmable reference clock input advanced, proven seek functionality. All the Skyworks - Signal quality measurement proven FM receiver expertise is incorporated in the - 3 x 3 x 0.55 mm 20-pin Pb-free QFN package Si4704/05, gained through thousands of designs with almost every OEM and ODM in the world and over 100 Applications million devices shipped. - Cellular handsets - MP3 players The Si4704/05 leverage Skyworks internationally patented and proven digital low-IF architecture, offering proven - Portable media players functionality in a simple and mature API. The device is - Personal computers offered in a highly reliable, ultra-small 3 x 3 x 0.55 mm 20- - Portable navigation devices pin QFN and is layout compatible with the full suite of - Consumer electronics Headphone Cable Si4704/05 ADC DAC FMI LOUT LNA PGA DSP RFGND ADC DAC ROUT AGC GPO LPI 0/90 DCLK 32.768 kHz RDS RSSI (Si4705) RCLK DOUT AFC CONTROL DFS 2.75.5 V VDD INTERFACE XTAL REG OSC Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice September 13, 2021 SEN SCLK SDIO RST VIO DIGITAL INTERFACE (Si4705)Si4704/05 Enhanced Broadcast FM Radio Receiver for Portable Applications Selected Electrical Specifications Parameter Symbol Test Condition Min Typ Max Unit Input Frequency f 64 108 MHz RF Sensitivity (76108 MHz) (S+N)/N = 26 dB 1.1 V EMF Input IP3 f f > 1 MHz f = 2 x f f 105 dBV EMF 2 1 0 1 2 AGC disabled Adjacent Channel Selectivity 200 kHz 50 dB Alternate Channel Selectivity 400 kHz 70 dB RCLK Frequency 32.768 kHz RCLK Frequency Tolerance 100 100 ppm Audio Output Voltage 72 80 90 mVrms Audio Mono S/N 55 63 dB Audio THD 0.1 0.5 % , V 2.7 5.5 V Supply Voltage V D A Interface Supply Voltage V 1.5 3.6 V IO Ambient Temperature T 20 25 85 C A Supply Current I 19.2 mA AD Powerdown Current I 10 12 A PD Seek/Tune Time 80 ms/channel SCLK Frequency f 3-wire operation 2.5 MHz CLK f 2-wire operation 400 kHz SCL Powerup Time From powerdown 110 ms Package Information Pin Assignments 20 19 18 17 NC 1 16 FMI 2 15 DOUT RFGND 3 14 LOUT GND LPI 4 PAD 13 ROUT RST 5 12 GND 6 11 VDD 7 8 9 10 Symbol Millimeters Symbol Millimeters Min Nom Max Min Nom Max A 0.50 0.55 0.60 f 2.53 BSC A1 0.00 0.02 0.05 L 0.35 0.40 0.45 b 0.18 0.25 0.30 L1 0.00 0.10 c 0.27 0.32 0.37 aaa 0.10 D 3.00 BSC bbb 0.10 D2 1.60 1.70 1.80 ccc 0.08 e 0.50 BSC ddd 0.10 E 3.00 BSC eee 0.10 E2 1.60 1.70 1.80 Notes: 1. All dimensions are shown in millimeters unless otherwise noted. 2. Dimensioning and tolerancing per ANSI Y14.5M-1994. Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice September 13, 2021 SEN NC SCLK SDIO GPO1 RCLK GPO2/INT VIO GPO3/DCLK DFS