Si4701-A Overview
USB FM radio PDAs Notebook PCs The Si4701 integrates the plete tuner function from antenna input to stereo audio output for FM broadcast radio reception. Functional Block Diagram AMPLIFIER Headphone Cable FMIP FMIN LNA Si4701 I ADC DSP DAC LOUT PGA FILTER DEMOD Q ADC MPX AUDIO DAC ROUT 32.768 kHz RCLK 2.7 - 5.5 V VA VD AGC TUNE REG 0 / 90 AFC LOW-IF GPIO RDS RSSI CONTROL INTERFACE GPIO VIO RST SDIO SCLK SEN CONTROLLER Ordering Information: See page 26. Pin Assignments (Top View) Notes: 1. FM Receiver performance is subject 4.1. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Si4701-A Key Features
- 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
