Si4700/01 Broadcast FM Radio Tuner for Portable Applications Description Features The Si4700 is the industry's first FM radio tuner IC to leverage digital integration and 100% CMOS process technology, resulting in a completely integrated solution that requires only one external supply bypass capacitor and less than 20 mm2 of board space. Offering unmatched integration, the Si4700 allows FM radio reception to be added to a variety of portable devices where board space, performance, low power consumption, and ease of use are essential. Leveraging Silicon Laboratories' proven Aero(R) digital low intermediate frequency (low-IF) receiver architecture and frequency synthesizer technology, the Si4700 delivers superior RF performance and interference rejection. Digital signal processing is utilized to provide optimum sound quality with varying reception conditions. The high integration and complete system production test simplifies design-in, increases quality, and improves manufacturing. The Si4700 also uses a streamlined programming model, which further reduces product development time. Power management is also simplified with an integrated regulator allowing direct connection to a 2.7 to 5.5 V battery. The Si4701 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. Using this feature, the Si4701 enables data such as station identification and song name to be displayed to the user. - Worldwide FM band support (76-108 MHz) 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 s) Adaptive noise suppression Volume control Line-level analog output 32.768 kHz reference clock RDS/RBDS processor (Si4701 only) 2-wire and 3-wire control interface 2.7 to 5.5 V supply voltage Integrated LDO regulator allows direct connection to battery - 4x4 mm 24-pin QFN package - Lead-free/RoHS compliant Applications - Cellular handsets MP3 players PDAs, Notebook PCs Portable radios USB FM radio FMIP PGA FMIN Q ADC AGC 0 / 90 DSP FILTER DEMOD MPX AUDIO LOW-IF DAC DAC GPIO 32.768 kHz AFC REG RSSI Copyright (c) 2005 by Silicon Laboratories CONTROL INTERFACE TUNE RDS (Si4701) VA VD FM Tuner ROUT GPIO VIO RCLK 2.7 - 5.5 V LOUT RST SDIO SCLK SEN CONTROLLER I ADC AMPLIFIER Si4700/01 Headphone Cable 5.23.06 Si4700/01 Broadcast FM Radio Tuner for Portable Applications Selected Electrical Specifications Parameter Symbol Input Frequency Test Condition Min fRF Sensitivity Typ Max Unit 76 -- 108 MHz (S+N)/N = 26 dB -- 2.5 3.5 V EMF f = 2 kHz, RDS BLER = 5% -- 15 -- V EMF |f2 - f1| > 1 MHz; f0 = 2 x f1 - f2 AGC disabled -- 108 -- dBV Adjacent Channel Selectivity 200 kHz 35 50 -- dB Alternate Channel Selectivity 400 kHz 60 70 -- dB RDS Sensitivity Input IP3 RCLK Frequency RCLK Frequency Tolerance Audio Output Voltage Audio Band Limits 0 to -3 dB -- 32.768 -- kHz -200 -- 200 ppm 72 80 90 mVrms 30 -- 15k Hz Audio S/N 63 Audio THD dB -- 0.1 0.5 % VD, VA 2.7 -- 5.5 V VIO 1.5 -- 3.6 V Ambient Temperature TA -20 25 85 C Supply Current IAD -- 17.6 -- mA Powerdown Current IPD -- 4 20 A -- -- 60 ms/channel Supply Voltage Interface Supply Voltage Seek Time SCLK Frequency fCLK 3-wire operation 0 -- 2.5 MHz fSCL 2-wire operation 0 -- 400 kHz From powerdown -- -- 110 ms Powerup Time Package Information GND NC NC GPIO1 GPIO2 GPIO3 Pin Assignments 24 23 22 21 20 19 GND 1 18 VA FMIP 2 17 GND RFGND 3 16 LOUT GND PAD FMIN 4 15 ROUT GND 5 14 GND 8 9 10 11 12 SEN SCLK SDIO RCLK VIO 13 VD 7 RST GND 6 Symbol A A1 b D, E D2, E2 e FM Tuner Min 0.80 0.00 0.18 2.20 Millimeters Nom 0.85 0.02 0.25 4.00 BSC 2.30 0.50 BSC Symbol Max 0.90 0.05 0.30 2.40 L L1 aaa bbb ccc ddd Min 0.30 0.03 -- -- -- -- Millimeters Nom 0.40 0.05 -- -- -- -- Copyright (c) 2005 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 Max 0.50 0.08 0.10 0.10 0.08 0.10 5.23.06