Si4730/31 AM/FM Radio Receivers


The Si4730/31 ICs are the industry's first fully integrated, 100% CMOS AM/FM radio receivers. The Si4730/31 AM/FM radio ICs provide the space savings and low-power consumption necessary for portable devices while delivering the high performance and design simplicity desired for all AM/FM solutions.

The Si473x-D60 devices are the industry’s first integrated AM/FM tuners with an AUXIN ADC. The Si473x-D60 tuners offer unparalleled integration, audio quality and performance for consumer audio applications that require low power dissipation, minimal board area and exceptional audio processing.

Offering unmatched integration and PCB space savings, the Si4730/31 ICs require only two external components and less than 15 mm² of board area. The Si473x-D60 tuners offer a stereo analog input and internal ADCs multiplexed with the radio tuner front-end to support auxiliary analog system inputs without the need for additional external ADCs.



  • Worldwide FM band support (76–108 MHz)
  • Worldwide AM band support (520–1710 kHz)
  • AM/FM digital tuning
  • Few external components required
  • No manual alignment required
  • Adjustable AM channel filters
  • Advanced AM/FM seek tuning

Si4730/31 Product Matrix

Part Number Data Sheet Description Tuning Method Display Method Mono/Stereo RDS FM AM SW LW WB TX EN55020
FM/AM Receiver Digital Digital Stereo No Yes Yes No No No No Yes
FM/AM Receiver w RDS Digital Digital Stereo Yes Yes Yes No No No No Yes
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