Si4702/03 Broadcast FM Radio Tuner for Portable Applications Description Features The Si4702/03 extends Silicon Laboratories Si4700 FM tuner family, and further increases the ease and attractiveness of adding FM radio reception to mobile devices through small size and board area, minimum component count, flexible programmability, and superior, proven performance. Si4702/03 software is backwards compatible to existing Si4700/01 FM tuner designs and leverages Silicon Laboratories' highly successful and patented Si4700/01 FM tuner. The Si4702/03 benefits from proven digital integration and 100% CMOS process technology, resulting in a completely integrated solution. It is the industry's smallest footprint FM tuner IC requiring only 10 mm2 board space and one external bypass capacitor. - Worldwide FM band support (76–108 MHz) - 3x3 mm 20-pin QFN package - Pb-free/RoHS compliant - Digital low-IF receiver - Frequency synthesizer with integrated VCO - Seek tuning - Automatic frequency control (AFC) - Automatic gain control (AGC) - Excellent overload immunity - Signal strength measurement - Programmable de-emphasis (50/75 µs) - Adaptive noise suppression - Volume control - Line-level analog output - 32.768 kHz reference clock - RDS/RBDS processor (Si4703 only) - 2-wire and 3-wire control interface - 2.7 to 5.5 V supply voltage - Integrated LDO regulator allows direct connection to battery The device offers significant programmability. It can be adapted to subjective listening requirements, and it allows adjustability in important parameters such as seek/tune, allowing the Si4702/03 to outperform other solutions by finding more valid stations and not stopping on frequencies that do not have a radio station. The Si4703 incorporates a digital processor for the European Radio Data System (RDS) and the US Radio Broadcast Data System (RBDS) including all required symbol decoding, block synchronization, error detection, and error correction functions. RDS enables data such as station identification and song name to be displayed to the user. The Si4703 offers a detailed RDS view and a standard view, allowing adopters to selectively choose granularity of RDS status, data, and block errors. Si4703 software is backwards compatible to the proven Si4701, adopted by leading cell-phone and MP3 manufacturers world-wide. The Si4702/03 is based on the superior, proven performance of Silicon Laboratories' Aero architecture offering unmatched interference rejection and leading sensitivity. The device uses the same programming interface as the Si4700/01 and supports multiple bus-modes. Power management is also simplified with an integrated regulator allowing direct connection to a 2.7 to 5.5 V battery. The Si4702/03 device’s high level of integration and complete FM system production testing increases quality to manufacturers, improves device yields, and simplifies device manufacturing and final testing. Applications - Cellular handsets MP3 players PDAs, Notebook PCs Portable radios Portable navigation Automobile applications Consumer electronics USB FM radios RFGND LNA PGA Q ADC AGC 0 / 90 DSP FILTER DEMOD MPX AUDIO LOW-IF DAC DAC GPIO 32.768 kHz REG XTAL OSC RDS (Si4703) RSSI CONTROL INTERFACE AFC TUNE VA VD FM Tuner ROUT GPIO VIO RCLK 2.7–5.5 V LOUT Copyright © 2006 by Silicon Laboratories RST SDIO SCLK SEN CONTROLLER I ADC FMIP AMPLIFIER Si4702/03 Headphone Cable 8.10.06 Si4702/03 Broadcast FM Radio Tuner for Portable Applications Selected Electrical Specifications Parameter Symbol Input Frequency Test Condition Min fRF Typ Max Unit 76 — 108 MHz Sensitivity (S+N)/N = 26 dB — 2.5 — µV EMF Input IP3 |f2 – f1| > 1 MHz; f0 = 2 x f1 – f2 AGC disabled — 108 — dBµV EMF Adjacent Channel Selectivity ±200 kHz — 50 — dB Alternate Channel Selectivity ±400 kHz — 70 — dB — 32.768 — kHz –200 — 200 ppm 72 80 90 mVrms RCLK Frequency RCLK Frequency Tolerance Audio Output Voltage Audio Band Limits 30 — 15k Hz Audio S/N ±1.5 dB — 63 — dB Audio THD — 0.1 0.5 % 2.7 — 5.5 V Supply Voltage VD, VA Interface Supply Voltage VIO 1.5 — 3.6 V Ambient Temperature TA –20 25 85 °C Supply Current IAD — 18 — mA Powerdown Current IPD — 5 15 µA Seek/Tune Time SCLK Frequency fCLK fSCL Powerup Time — — 60 ms/channel 3-wire operation — — 2.5 MHz 2-wire operation — — 400 kHz From powerdown — — 110 ms Package Information 5 VA RST GPIO3 4 17 16 15 GND 14 LOUT GND PAD 13 ROUT 12 GND 6 7 8 9 10 VIO GND GPIO2 3 18 RCLK RFGND GPIO1 2 19 SDIO FMIP 20 SCLK 1 SEN NC NC Pin Assignments 11 VD Symbol A A1 b c D D2 e E E2 FM Tuner Min 0.50 0.00 0.18 0.27 1.65 1.60 Millimeters Nom 0.55 0.02 0.25 0.32 3.00 BSC 1.70 0.50 BSC 3.00 BSC 1.70 Symbol Max 0.60 0.05 0.30 0.37 1.75 Min f L L1 aaa bbb ccc ddd eee 0.35 0.00 — — — — — Millimeters Nom 2.53 BSC 0.40 — — — — — — Max 0.45 0.10 0.10 0.10 0.08 0.10 0.10 1.80 Copyright © 2006 by Silicon Laboratories Silicon Laboratories and Silicon Labs are trademarks of Silicon Laboratories Inc. Other products or brandnames mentioned herein are trademarks or registered trademarks of their respective holders 8.10.06