Description
The Si4684 single-chip digital receiver is one member of a family of 100% CMOS digital radio broadcast receiver ICs from Silicon Labs. The Si468x family offers a complete and cost-effective digital radio solution integrating the RF tuner, baseband and audio processing on a single die. The high level of integration provides significant customer benefits compared to traditional digital radio solutions, including a reduction in system implementation complexity, validation and testing, and improved reliability and manufacturability.
The Si4684 offers VHF Band III (168-240 MHz) reception capability and is fully compliant with ETSI EN 300 401 and ETSI TS 102 563. The Si4688 supports DAB and DAB+ via an integrated source decoder that supports both MPEG Audio Layer 2 (DAB) and HE-AAC V2 (DAB+). The Si4684 supports data services such as Dynamic Labels, Intellitext, Electronic Program Guide (EPG), Slideshow and Journaline® with the appropriate external decoders.
The Si4684 additionally supports worldwide FM radio reception and incorporates a fully integrated decoder for the European Radio Data System (RDS) and the North American Radio Broadcast Data System (RDBS) including all required symbol decoding, block synchronization, error detection, and error correction functions.
For more information, visit the Si468x Digital Radio Receivers web page.

Features
- Worldwide FM band support (76–108 MHz)
- Advanced RDS/RBDS decoder
- DAB, DAB+ Band III support (168–240 MHz)
- Supports WorldDMB Receiver Profiles 1 and 2
- Integrated OFDM channel demodulator
- Integrated de-interleaving SRAM
- I2S digital audio out with ASRC
- Integrated 97 dB stereo audio DAC
- Concurrent I2S/L-R stereo audio out
- Full range of signal quality metrics
- Fully-integrated VCO / PLL / synthesizer
- SPI and I2C host control interfaces
- WLCSP 62-ball, 3.2x3.77x0.59 mm
- QFN 48-pin, 7x7x0.85 mm

Applications
- Mobile phones and tablets
- Clock and tabletop radios
- Stereo boomboxes
- Mini/micro systems
- Docking stations
- Personal navigation devices