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3.8FM Radio (Si4703)
Figure.3-8 Si4703 FUNCTIONAL BLOCK DIAGRAM
Features
This data sheet applies to Si4702/03 Firmware 15 and greater
Worldwide FM band support (76–108 MHz)
Digital low-IF receiver
Frequency synthesizer with integrated VCO
Seek tuning
Automatic frequency control (AFC)
Automatic gain control (AGC)
Excellent overload immunity
Signal strength measurement
Programmable de-emphasis (50/75 µs)
Adaptive noise suppression
Volume control
Line-level analog output
32.768 kHz reference clock
2-wire and 3-wire control interface
2.7 to 5.5 V supply voltage
Integrated LDO regulator allows direct connection to battery
3 x 3 mm 20-pin QFN package
– Lead-free/RoHS compliant
RDS/RBDS Processor (Si4703)
30
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