SI4707-B20-GMR Silicon Labs

Si4707-B20 WEATHER BAND AND SAME DATA RECEIVER Features Weather band support WB digital tuning Low-IF direct conversion with no (162.4162.55 MHz) external ceramic filters SAME processor Programmable reference clock Excellent SAME sensitivity Volume control Byte-wise data quality metrics Receive signal quality indicators Advanced error correction (RSSI and SNR) 1050 Hz alert tone detection 2-wire and 3-wire control interface Excellent real-world performance Ordering Information: Integrated LDO regulator Freq synthesizer with integrated VCO See page 21. 2.7 to 5.5 V supply voltage Automatic frequency control (AFC) Firmware upgradeable Automatic gain control (AGC) 3 x 3 x 0.55 mm 20-pin QFN package Adaptive noise suppression Pin Assignments Pb-free/RoHS compliant Si4707-B20-GM Applications (Top View) Emergency radios Boom boxes Table and portable radios Cellular handsets Stereos Modules Mini/micro systems Clock radios Portable media players Mini HiFi 20 19 18 17 NC 1 16 Description FMI 2 15 NP2 RFGND 3 14 LOUT GND The Si4707 is the first digital CMOS weather band and SAME decoder receiver IC to integrate the complete tuner and decoder functionality from antenna input to PAD NP1 4 13 ROUT audio and/or data output. RST 5 12 GND 6 11 VDD 7 8 9 10 Functional Block Diagram Weather Band Si4707 Antenna ADC DAC LOUT FMI Patents pending LNA PGA DSP RFGND Notes: 1. To ensure proper operation and ADC DAC ROUT receiver performance, follow the AGC guidelines in AN383: Si47xx 0/90 Antenna, Schematic, Layout, and Design Guidelines. Skyworks will 32.768 kHz RSSI / SAME GPO GPO evaluate schematics and layouts for SNR RCLK AFC qualified customers. 2. Place Si4707 as close as possible to CONTROL 2.75.5 V VDD antenna jack and keep the FMI INTERFACE XTAL REG traces as short as possible. 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 5, 2021 SEN SCLK SDIO RST VIO SEN NC SCLK SDIO GPO1 RCLK GPO2/INT VIO GPO3 NP3Si4707-B20 TABLE OF CONTENTS Section Page 1. Electrical Specifications .3 2. Typical Application Schematic .11 3. Bill of Materials 12 4. Functional Description .13 4.1. Overview 13 4.2. Block Diagram Description 14 4.3. Weather Band Receiver 14 4.4. DAC 14 4.5. SAME Processor 14 4.6. Tuning 15 4.7. Reference Clock 15 4.8. Control Interface 15 4.9. GPO Outputs .17 4.10. Firmware Upgrades .17 4.11. Reset, Powerup, and Powerdown 17 4.12. Programming with Commands 17 5. Commands and Properties 18 6. Pin Descriptions: Si4707-B20 20 7. Ordering Guide 21 8. Package Markings (Top Marks) .22 8.1. Top Mark 22 8.2. Top Mark Explanation 22 9. Package Outline: Si4707 QFN 23 10. PCB Land Pattern: Si4707 QFN 24 11. Additional Reference Resources 26 Document Change List .27 Contact Information 28 2 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 5, 2021