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Description: The Si473x-D60 digital CMOS AM/FM radio receiver IC integrates the complete tuner function from antenna input to digital audio output and includes a stereo audio AUXIN ADC input for converting analog audio into standard I2S digital audio, enabling a cost efficient digital audio platform for consumer electronic applications with high TDMA noise immunity, superior radio performance, and high fidelity audio power amplification. When enabling the analog inputs in stereo AUXIN ADC-mode, the Si473x-D60 supports I2S digital audio output only.

Note: We are currently updating our images, they show the older version of the IC.

Features:

  • Wide range of ferrite loop sticks and air loop antennas supported
  • Worldwide FM band support (64–108 MHz)
  • Worldwide AM band support (520–1710 kHz)
  • SW band support (2.3–26.1 MHz)
  • LW band support (153–279 kHz)
  • Advanced AM/FM seek tuning
  • Automatic frequency control (AFC) and gain control (AGC)
  • AM/FM/SW/LW digital tuning with digital FM stereo decoder
  • Programmable de-emphasis
  • Multiplexed stereo audio AUXIN
  • ADC with 85 dB dynamic range
  • Seven selectable AM channel filters
  • Programmable reference clock
  • Adjustable soft mute control
  • RDS/RBDS processor
  • 2-wire and 3-wire control interface
  • Integrated LDO regulator
  • EN55020 compliant
  • Digital audio out
  • Integrated VCO

Documents:

Comments 28 comments

  • “Note: We are currently updating our images, they show the older version of the IC.”

    I can’t wait to see what the new version of the IC looks like.

  • Any updates on breakout board?

  • Seeing that I can’t rely on the image, do you carry the SSOP or the QFN package?

    Is a breakout board coming? Its been awhile.

  • Would it be possible to use these to receive DARC data? Moving the RDS center frequency to 76 kHz would probably be enough, but I dcanät find any info in the datashett about it…

  • +1 for the weather band enabled version of this chip

  • Is there any hope for the SI4736-39 series to allow adding Weather Radio to the above abilities?

    • Why???

      I’d go for the si4743 instead. It does everything the above chip does PLUS weather band as opposed to the SI4736 which drops the short and long wave support. Of course, if you don’t care about those you don’t have to use that functionality. I’d like the chip where we can have EVERYTHING!!

  • Anyone who was looking at the C40 version of this chip (COM-10227), this is the newer revision from the manufacturer. It should be noted that while the C40 version supported SPI, this chip is I2C only.

  • Are you planning on updating the Si4735 Breakout board with this new IC version?

    • yes.

      • Any news about the upgraded SI4735 breakout board (which i’m looking for) ?

        • still in the works. it’s not exactly a drop-in replacement, so we have to redo some things. but we’re working on it.

          • “ it’s not exactly a drop-in replacement, so we have to redo some things.” Other than the loss of SPI and the analogue audio input, what else changed? I’m racking my brain an re-reading the data sheets over and over trying to figure out why i cant talk to the D60. I was talking to the c40 via i2c, but now wire.endTransmission() returns “2” (nack addr). I am about to put the C40 back in and cut my losses.

            • “AN332 - Si47xx Programming Guide - Rev 0.8” in Appendix B, page 317 says the -D60 has a bug when placed in FM receive mode:

              There is a debug feature that remains active in Si4704/05/3x-D60 firmware which can create periodic noise in audio. Silicon Labs recommends you disable this feature by sending the following bytes (shown here in hexadecimal form):

              0x12 0x00 0xFF 0x00 0x00 0x00

              This is equivalent to setting property 0xFF00 to a value of 0x0000.

              It’s a long shot but it might be worth trying.

              • Good to know, thanks for the tip, I was wondering what that noise was. I got it working BTW, it was a mixture of problems. my signal to RST was below 70% of Vd (bad math on my part), so chip never came out of reset. And hence, no response to the power up command.

                • Glad to help. By the way, what board did you solder this chip to? Or did you make your own custom board?

                  • I’ve been working on my own custom board. I’m using a TDA7719 for audio switching and processing, and a Raspberry Pi with a touchscreen for a GUI. I have a working prototype and some new boards are being turned right now that will hopefully be the final revision. I’m willing to share more details and my project files, as long as it is understood that I am not an engineer so my design is far from perfect and this project is far from complete.

                    • You should share them. It would be fun to take a looksy at what you did. Thanks!

          • Is there a way to stay informed of when the SI4735 updated breakout will be? I mean, other than the new product Friday videos? I’m stoked for this update.

            Cheers!

      • Is that necessary? A quick scan of the pinouts from the two datasheets showed that the pinouts are identical. Can I go ahead and use the old boards, or is there something I missed?

        • Never mind, I just realized that the board came with the chip already on it. I suppose you could unsolder the original chip and replace it with the new version, but that seems like a lot of hassle.


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