Silabs Si473x数字AM-FM无线电接收方案

Silabs公司的Si473x(Si4736/37/38/39)是首个数字CMOS AM/FM无线电接收器,集成了从天线输入到音频输出的完整的调谐功能,支持NOAA天气频道(162.4–162.55 MHz),世界FM频段(64–108 MHz)和AM频段(520–1710 kHz), AM/FM/WB数字调谐和数字立体声译码器.主要应用在新兴无线电,台式和手提无线电,立体声,密你HiFi和密你/微型系统等.本文介绍Si473x(Si4736/37/38/39)主要特性,功能方框图以及QFN封装和SSOP封装的典型应用电路,材料清单(BOM).

The Si4736/37/38/39 is the first digital CMOS AM/FM radio receiver IC that integrates the complete tuner function from antenna input to audio output.

Si473x主要特性:

NOAA weather band support (162.4–162.55 MHz)

Worldwide FM band support (64–108 MHz)

Worldwide AM band support (520–1710 kHz) (Si4736/37)
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1050 Hz alert tone detection
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Excellent real-world performance
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Freq synthesizer with integrated VCO
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Advanced AM/FM seek tuning

Automatic frequency control (AFC)
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Automatic gain control (AGC)
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Digital FM stereo decoder
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Programmable AVC max gain
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Programmable de-emphasis
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AM/FM/WB digital tuning
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No manual alignment necessary
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Programmable reference clock
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Volume control
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