fm tuner copyright ? 2006 by silicon laboratories 8.10.06 vio controller i adc q adc si4702/03 dsp filter demod mpx audio sclk sdio control interface sen dac dac rout lout 0 / 90 low-if rssi tune gpio amplifier gpio rst rfgnd lna fmip afc agc pga rclk reg va vd 32.768 khz 2.7?5.5 v headphone cable rds (SI4703) xtal osc 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 mobi le devices through small size and board area, minimum co mponent count, flexible programmability, and superior, proven performance. si4702/03 software is backwards compatible to existing si4700/01 fm tuner designs and leverages silicon labor atories' 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 t uner ic requiring only 10 mm 2 board space and one external bypass capacitor. the device offers significant programmability. it can be adapted to subjective listening requirement s, 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 digi tal 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 stat ion 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 stat us, data, and block errors. SI4703 software is backwards compat ible to the proven si4701, adopted by leading cell-phone and mp3 manufacturers world-wide. the si4702/03 is based on the s uperior, proven performance of silicon laboratories' aero ar chitecture offering unmatched interference rejection and leading s ensitivity. the device uses the same programming interfac e as the si4700/01 and supports multiple bus-modes. power management is also simplified with an integrated regulator allowing di rect 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 devic e 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 frequen cy control (afc) - automatic gain control (agc) - excellent overload immunity - signal strength measurement - programmable de-emphasis (50/75 s) - adaptive noise suppression - volume control - line-level analog output - 32.768 khz reference clock - rds/rbds processor (SI4703 only) - 2-wire and 3-wire co ntrol 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
fm tuner copyright ? 2006 by silicon laboratories 8.10.06 silicon laboratories and silicon labs are trademarks of silicon laboratories inc. other products or brandnames mentioned her ein are trademarks or registered tr ademarks of their respective holders si4702/03 broadcast fm radio tuner for portable applications parameter symbol test condition min typ max unit input frequency f rf 76 ? 108 mhz sensitivity (s+n)/n = 26 db ? 2.5 ? v emf input ip3 |f 2 ? f 1 | > 1 mhz; f 0 = 2 x f 1 ? f 2 agc disabled ? 108 ? dbv emf adjacent channel selectivity 200 khz ? 50 ? db alternate channel selectivity 400 khz ? 70 ? db rclk frequency ? 32.768 ? khz rclk frequency tolerance ?200 ? 200 ppm audio output voltage 72 80 90 mvrms audio band limits 1.5 db 30 ? 15k hz audio s/n ? 63 ? db audio thd ? 0.1 0.5 % supply voltage v d , v a 2.7 ? 5.5 v interface supply voltage v io 1.5 ? 3.6 v ambient temperature t a ?20 25 85
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