Si4822/26/27/40/44 Analog-Tuned Digital Display AM/FM/SW Radio Receiver 

The Si4822/26/27/40/44 is the first analog-tuned digital-display CMOS AM/FM/SW radio receiver IC that integrates the complete receiver function from antenna input to audio output. Working with a host MCU I<sup>2</sup>C-compatible 2-wire control interface, frequencies and stereo/mono information can be displayed on an LCD, while the analog-tune features are kept.

Leveraging Silicon Labs' proven and patented digital low intermediate frequency (low-IF) receiver architecture, the Si4822/26/27/40/44 deliver superior RF performance and interference rejection. The integrated superior control algorithm provides an easy and reliable control interface while eliminating all of the manual tuned external components used in a traditional solution.

For consumer applications that require EN 55020 compliance, use the Si4840/44 family.

 

Features

  • Worldwide FM band support (64–109 MHz)
  • Worldwide AM band support (504–1750 kHz)
  • SW band support (2.3–28.5 MHz) (Si4826/27/44 only)
  • Selectable support for all AM/FM regional bands
  • 2-wire control interface
  • Mono/Stereo and valid station indicator
  • Digital volume support
  • Bass/Treble support
  • Minimal BOM components with no manual alignment
  • Excellent real-world performance
  • Automatic frequency control (AFC)
  • EN55020 compliant
  • Two AAA batteries with 2.0 to 3.6 V supply voltage
  • Wide range of ferrite loop sticks and air loop antenna support
  • 24-pin SSOP package
  • RoHS compliant

Si422/26/27/40/44 Product Matrix

Devices
Part Number Data Sheet Description RDS FM AM SW LW WB TX EN55020
Si4822-A10-CU
FM/AM w Mech Tune/Digital Display No No No No No No No No
Si4826-A10-CU
FM/AM/SW w Mech Tune/Dig Disp No No No No No No No No
Si4827-A10-CS
FM/AM/SW-Wide band w Mech Tune/Dig Disp No No No No No No No No
Si4840-A10-GU
FM/AM w Mech Tune/Dig Disp No No No No No No No No
Si4844-A10-GU
FM/AM/SW w Mech Tune/Dig Disp No No No No No No No No
Si4844-B20-GU
FM/AM/SW-Wide band w Mech Tune/Dig Disp No No No No No No No No
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