Description
The Si4736/37/38/39 is the first digital CMOS AM/FM/WB radio receiver IC that integrates the complete tuner function from antenna input to audio output.
5.5 V
VDD GND
LNA AGC
LNA AGC LDO
Si473x
RDS (Si4737/
39)
LOW-IF
DIGITAL AUDIO (Si4737/
39)
DOUT DFS GPO/DCLK
ADC DAC DSP
ADC DAC
ROUT LOUT
AFC
CONT
Features
- NOAA weather band support (162.4.
- No manual alignment necessary
162.55 MHz).
- Programmable reference clock.
- Worldwide FM band support.
- Volume control
(76.
- 108 MHz).
- Programmable soft mute control.
- Worldwide AM band support.
- Programmable de-emphasis
(520.
- 1710 kHz) (Si4736/37 only).
- RDS/RBDS processor (Si4737/39.
- 1050 Hz alert tone detection
only).
- Excellent real-world performance.
- Optional digital a.