Si4712 Datasheet | Silicon Labs

Features Integrated receive power measurement Worldwide FM band support (76- 108 MHz) Requires only two external ponents Frequency synthesizer with integrated VCO Digital stereo modulator Programmable pre-emphasis Analog/digital audio interface Audio silence detector Programmable reference clock RDS/RBDS encoder (Si4713 only) PCB loop and stub antenna support with self-calibrated capacitor tuning Programmable transmit level Audio dynamic range control Advanced modulation control 2.7 to 5.5 V supply voltage Integrated LDO regulator 3 x 3 x 0.55 mm 20-pin QFN Pb-free and Ro HS pliant Designed for patibility with cellular operation Applications Cellular handsets/hands-free MP3 players Portable media players Wireless speakers/microphone Satellite digital audio radios Personal puters/notebooks Description The Si4712/13-B30 integrates the plete transmit functions for standards-pliant unlicensed FM broadcast stereo transmission. The chip also allows integrated receive power scanning to identify low signal power FM channels. Users must ply with local regulations on radio frequency (RF) transmission. Functional Block Diagram Si4712/13 Ordering Information: See page 34. Pin Assignments Si4712/13-B30 (Top View) NC GPO1 GPO2/INT GPO3/DCLK LIN NC 1 20 19 18 17 16 NC 2 15 RIN RFGND 3 TXO 4 GND PAD 14 DFS 13 DIN RST 5 12 GND 6 7 8 9 10 11 VDD SEN SCLK SDIO RCLK Tx Ant TXO L1 120 n H RFGND PEAK DETECT DIGITAL AUDIO DSP DAC ADC DAC ADC DIN DFS LIN RIN Patents pending Note: To ensure proper operation and performance, follow the guidelines in “AN383: Universal Antenna Selection and Layout Guidelines.” Silicon Laboratories will evaluate schematics and layouts for qualified customers. VDD 2.7- 5.5 V CONTROL INTERFACE GPO RDS...