​Si4707 Weather Band Radio Receiver ICs

The Si4707 IC is the industry's first weather band (WB) radio receiver to include a specific area message encoding (SAME) processor. Offering unmatched integration and PCB space savings, the Si4707 requires only one external component and less than 15 mm² of board area.

Available in a tiny 3 mm x 3 mm QFN package, it eliminates the need for a front-end tuner IC, external ADC, DSP, RAM and numerous discrete components found in traditional SAME weather band radios.

The Si4707 weather band receiver provides the space savings and low-power consumption necessary for portable devices while delivering the high performance and design simplicity desired for all weather alert radios.

Leveraging Silicon Labs' proven and patented Si4700/01 FM tuner's digital low intermediate frequency (low-IF) receiver architecture, the Si4707 delivers superior RF performance combined with sophisticated digital processing to yield best-in-class audio quality and SAME data sensitivity.

The high integration and complete system production test simplifies design in, increases system quality and improves manufacturability.

Features

• Weather band support (162.4-162.55 MHz)

• SAME processor

• 1050 Hz alert tone detection

• Frequency synthesizer with integrated VCO

• WB digital tuning

• Programmable reference clock

• 2.7 to 5.5 V supply voltage