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)
1050 Hz alert tone detection
Excellent real-world performance
Freq synthesizer with integrated VCO
Advanced AM/FM seek tuning
Automatic frequency control (AFC)
Automatic gain control (AGC)
Digital FM stereo decoder
Programmable AVC max gain
Programmable de-emphasis
AM/FM/WB digital tuning
No manual alignment necessary
Programmable reference clock
Volume control
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