Si4790x Automotive Tuners


The Silicon Labs Si4790x analog AM/FM receiver and digital radio tuner family sets a new standard for automotive broadcast reception.   Meeting rigorous automotive quality standards, our Si4790x automotive tuners are the most integrated monolithic ICs in the industry with the smallest external bill of materials. Using a common software API, designers can reuse their R&D across multiple product lines. Our automotive tuners can scale from low cost single tuner AM/FM radios to high performance systems with multiple tuners and multiple antennas. 



  • Worldwide FM band support (64–108 MHz)
  • Worldwide AM band support (520–1710 kHz)
  • LW band support (144–288 kHz)DAB/DAB+/DMB support (Si47902 only) (170–240 MHz)
  • SW band support (2.3–30 MHz)
  • NOAA Weather band support
  • On-chip soft-decision RDS/RDBS demodulator/decoder
  • Two analog audio outputs
  • Two digital audio ports (I2S)
  • Integrated clock oscillator
  • 1.8 V or 3.3 V digital IO power supplies
  • 3.3 V analog power supply and 1.8 V digital power supply
  • QFN 48-pin, 7 x 7 x 0.85 mm
  • Pb-free/RoHS compliant
  • AEC-Q100 qualified (A-grade parts)


  • Comprehensive AM/FM signalprocessing firmware
  • Integrated active AM/FM buffers
  • Fully integrated AGC

DRM30/DRM+ (Si47902 and Si47907)

  • DRM detect
  • Digital I/Q interface to DRM processor
  • Fully integrated AGC

DAB/DAB+/DMB (Si47902 only)

  • Digital I/Q interface to DAB/DAB+/DMB processor
  • Integrated active Band III buffer
  • Fast DAB/DAB+/DMB band scan
  • Fully integrated AGC for Band III

HD Radio (Si47901 and Si47902)

  • Digital I/Q interface to HD Radio Processor
  • Fast FM HD Radio band scan

Si4790x Product Matrix

Part Number Data Short FM AM SW LW WB RDS DRM30/DRM+ HD Radio DAB/DAB+ FM Diversity Audio System
Yes Yes Yes Yes Yes Yes No Yes No No No
Yes Yes Yes Yes Yes Yes Yes Yes Yes No No
Yes Yes Yes Yes No Yes Yes No No No No
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