SI4703

Si4702/03 Broadcast FM Radio Tuner for Portable Applications Description 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. 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. Features - 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 Applications Cellular handsets MP3 players PDAs, Notebook PCs Portable radios Portable navigation Automobile applications Consumer electronics USB FM radios Headphone Cable FMIP RFGND LNA PGA Q ADC I ADC Si4702/03 DAC FILTER DEMOD MPX AUDIO DAC ROUT AGC 32.768 kHz 0 / 90 LOW-IF GPIO GPIO VIO CONTROL INTERFACE RCLK 2.7–5.5 V VA VD TUNE AFC RDS (Si4703) RST SDIO SCLK SEN REG XTAL OSC RSSI FM Tuner Copyright © 2006 by Silicon Laboratories CONTROLLER AMPLIFIER DSP LOUT 8.10.06 Si4702/03 Broadcast FM Radio Tuner for Portable Applications Selected Electrical Specifications Parameter Input Frequency Sensitivity Input IP3 Adjacent Channel Selectivity Alternate Channel Selectivity RCLK Frequency RCLK Frequency Tolerance Audio Output Voltage Audio Band Limits Audio S/N Audio THD Supply Voltage Interface Supply Voltage Ambient Temperature Supply Current Powerdown Current Seek/Tune Time SCLK Frequency Powerup Time fCLK fSCL 3-wire operation 2-wire operation From powerdown VD, VA VIO TA IAD IPD ±1.5 dB Symbol fRF (S+N)/N = 26 dB |f2 – f1| > 1 MHz; f0 = 2 x f1 – f2 AGC disabled ±200 kHz ±400 kHz Test Condition Min 76 — — — — — –200 72 30 — — 2.7 1.5 –20 — — — — — — Typ — 2.5 108 50 70 32.768 — 80 — 63 0.1 — — 25 18 5 — — — — Max 108 — — — — — 200 90 15k — 0.5 5.5 3.6 85 — 15 60 2.5 400 110 Unit MHz µV EMF dBµV EMF dB dB kHz ppm mVrms Hz dB % V V °C mA µA ms/channel MHz kHz ms Pin Assignments GPIO1 GPIO2 GPIO3 NC VA Package Information NC FMIP RFGND GND RST 1 2 3 4 5 6 SEN 20 19 18 17 16 15 GND GND PAD 14 LOUT 13 ROUT 12 GND 7 SCLK 8 SDIO 9 RCLK 10 VIO 11 VD Symbol A A1 b c D D2 e E E2 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 FM Tuner Copyright © 2006 by Silicon Laboratories 8.10.06 Silicon Laboratories and Silicon Labs are trademarks of Silicon Laboratories Inc. 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