Si4734/35 Broadcast AM/FM/SW/LW Radio Receiver Description Features The Si4734/35 is the industry's first fully integrated, 100% CMOS AM/FM/SW/LW radio receiver IC. Offering unmatched integration and PCB space savings, the Si4734/35 requires minimal external components and less than 20 mm2 of board area, excluding the antenna inputs. The Si4734/35 AM/FM/SW/LW radio provides the space savings and low power consumption necessary for portable devices while delivering the high performance and design simplicity desired for all AM/FM/SW/LW solutions. Leveraging Silicon Laboratories' proven and patented Si4700/01 FM tuner's digital low intermediate frequency (low-IF) receiver architecture, the Si4734/35 delivers superior RF performance and interference rejection in AM, FM, and short wave and long wave bands. The high integration and complete system production test simplifies design-in, increases system quality, and improves manufacturability. The Si4734/35 is a feature-rich solution including advanced seek algorithms, soft mute, auto-calibrated digital tuning, and FM stereo processing. In addition, the Si4734/35 provides analog or digital audio output and a programmable reference clock. The device supports I2Ccompatible 2-wire control interface, SPI, and a Si4700/01 backwards-compatible 3-wire control interface. The Si4734/35 utilizes digital processing to achieve high fidelity, optimal performance, and design flexibility. The chip provides excellent pilot rejection, selectivity, and unmatched audio performance, and offers both the manufacturer and the end-user extensive programmability and flexibility in the listening experience. The Si4735 incorporates a digital processor for the European Radio Data System (RDS) and the North American Radio Broadcast Data System (RBDS), including all required symbol decoding, block synchronization, error detection, and error correction functions. Using RDS, the Si4735 enables broadcast data such as station identification and song name to be displayed to the user. - Worldwide FM band support (64–108 MHz) Worldwide AM band support(520–1710 kHz) SW band support (2.3–21.85 MHz) LW band support (153–279 KHz) Excellent real-world performance Freq synthesizer with integrated VCO Automatic frequency control (AFC) Automatic gain control (AGC) Integrated LDO regulator Digital FM stereo decoder Programmable de-emphasis Adaptive noise suppression AM/FM/SW/LW digital tuning No manual alignment necessary Adjustable channel filters EN55020 complaint Programmable reference clock Digital volume control Adjustable soft mute control RDS/RBDS processor (Si4735 only) Optional digital audio out (Si4735 only) 2-wire and 3-wire control interface 2.7 to 5.5 V supply voltage Wide range of ferrite loop sticks and air loop antennas supported - 3 x 3 x 0.55 mm 20-pin QFN package - Pb-free/RoHS compliant Applications - Table and portable radios Stereos Mini/micro systems Portable media players Boomboxes Clock radios Modules Entertainment systems Cellular handsets FM/SW ANT Si4734/35 FMI RDS (Si4735) LNA LOW-IF AGC ADC LNA 2.7–5.5 V ADC AFC RCLK LDO AM/FM Receiver ROUT DAC LOUT DSP VDD GND DFS GPO/DCLK CONTROL INTERFACE VIO 1.5–3.6 V RST AGC DOUT DAC SDIO RFGND SEN AMI SCLK AM/LW ANT DIGITAL AUDIO (Si4735) Copyright © 2008 by Silicon Laboratories 4.1.08 Si4734/35 Broadcast AM/FM/SW/LW Radio Receiver Selected FM Electrical Specifications Parameter Symbol Input Frequency fRF Sensitivity headphone matching Sensitivity 50 matching Input IP3 Adjacent Channel Selectivity Alternate Channel Selectivity Audio Frequency Reponse Low Audio Frequency Reponse High Audio Mono S/N Audio THD Audio Output Voltage Supply Voltage* VD, VA Interface Supply Voltage* VIO Powerdown Current* IPD *Note: Applies to both FM and AM modes. Test Condition (S+N)/N = 26 dB (S+N)/N = 26 dB |f2 – f1| > 1 MHz; f0 = 2 x f1 – f2 ±200 kHz ±400 kHz –3 dB –3 dB Min 76 — — — — — — 15 — — 72 2.7 1.5 — Typ — 2.2 1.1 105 50 70 — — 63 0.1 80 — — 10 Max 108 — — — — — 30 — — — 90 5.5 3.6 — Unit MHz µV EMF µV EMF dBµV EMF dB dB Hz kHz dB % mVrms V V µA Min 520 2.3 153 — — — 54 Typ — — — 25 56 0.1 60 Max 1710 21.85 279 — — — 66 Unit kHz MHz kHz µV EMF dB % mVrms Selected AM/SW/LW Electrical Specifications Parameter Input Frequency Symbol fRF Test Condition Medium wave (AM) Short wave (SW) Long wave (LW) (S+N)/N = 26 dB Sensitivity Audio S/N Audio THD Audio Output Voltage GPO2/INT GPO3/DCLK DFS 1 GPO1 NC NC Pin Assignments 20 19 18 17 16 FMI 2 3 x 3 x 0.55 mm, 20-pin QFN Package Information 15 DOUT RFGND 3 14 LOUT GND PAD AMI 4 13 ROUT 6 7 8 9 10 SCLK SDIO RCLK VIO 12 GND SEN RST 5 11 VDD Symbol A A1 b c D D2 e E E2 AM/FM Receiver Millimeters Symbol Min Nom Max 0.50 0.00 0.18 0.27 0.55 0.02 0.25 0.32 3.00 BSC 1.70 0.50 BSC 3.00 BSC 1.70 0.60 0.05 0.30 0.37 1.60 1.60 1.80 f L L1 aaa bbb ccc ddd eee Millimeters Min Nom Max 0.35 0.00 — — — — — 2.53 BSC 0.40 — — — — — — 0.45 0.10 0.10 0.10 0.08 0.10 0.10 1.80 Copyright © 2008 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 4.1.08 Smart. Connected. Energy-Friendly Products Quality Support and Community www.silabs.com/products www.silabs.com/quality community.silabs.com Disclaimer Silicon Laboratories intends to provide customers with the latest, accurate, and in-depth documentation of all peripherals and modules available for system and software implementers using or intending to use the Silicon Laboratories products. Characterization data, available modules and peripherals, memory sizes and memory addresses refer to each specific device, and "Typical" parameters provided can and do vary in different applications. Application examples described herein are for illustrative purposes only. Silicon Laboratories reserves the right to make changes without further notice and limitation to product information, specifications, and descriptions herein, and does not give warranties as to the accuracy or completeness of the included information. Silicon Laboratories shall have no liability for the consequences of use of the information supplied herein. This document does not imply or express copyright licenses granted hereunder to design or fabricate any integrated circuits. The products must not be used within any Life Support System without the specific written consent of Silicon Laboratories. A "Life Support System" is any product or system intended to support or sustain life and/or health, which, if it fails, can be reasonably expected to result in significant personal injury or death. Silicon Laboratories products are generally not intended for military applications. Silicon Laboratories products shall under no circumstances be used in weapons of mass destruction including (but not limited to) nuclear, biological or chemical weapons, or missiles capable of delivering such weapons. Trademark Information Silicon Laboratories Inc., Silicon Laboratories, Silicon Labs, SiLabs and the Silicon Labs logo, CMEMS®, EFM, EFM32, EFR, Energy Micro, Energy Micro logo and combinations thereof, "the world’s most energy friendly microcontrollers", Ember®, EZLink®, EZMac®, EZRadio®, EZRadioPRO®, DSPLL®, ISOmodem ®, Precision32®, ProSLIC®, SiPHY®, USBXpress® and others are trademarks or registered trademarks of Silicon Laboratories Inc. ARM, CORTEX, Cortex-M3 and THUMB are trademarks or registered trademarks of ARM Holdings. Keil is a registered trademark of ARM Limited. All other products or brand names mentioned herein are trademarks of their respective holders. Silicon Laboratories Inc. 400 West Cesar Chavez Austin, TX 78701 USA http://www.silabs.com