AM/FM receivers deliver superior RF performance while reducing system cost

AM/FM receivers deliver superior RF performance while reducing system cost

The Si477x AM/FM receivers are claimed to provide industry-leading RF performance and exceptional configurability while reducing system cost and complexity for consumer audio/video receivers, FM receiver monitors, and pro-audio receivers. The Si477x family includes two feature-rich, single-chip devices: the Si4770, a global multiband AM/FM receiver, and the Si4777, an AM/FM receiver supporting HD Radio tuner functionality. The company claims that its highly integrated AM/FM receiver design improves robustness and delivers superior audio quality in all reception conditions while reducing system cost and complexity.

The Si477x family offers unsurpassed RF sensitivity (–3.5 dBµV), adjacent and alternate channel selectivity, linearity and audio fidelity through advanced DSP algorithms. The receivers can tune to signals down to 0.67 µV, picking up stations up to 100 miles away.

They integrate a highly linear RF front end and sophisticated RF and IF automatic gain control (AGC) coupled with a state-of-the-art dynamic bandwidth control algorithm. The Si477x also offer best-in-class selectivity of 65 dB at ±100 kHz and 72 dB at ±200 kHz frequency offset from the desired station.

The Si477x receivers also feature an on-chip “prosumer” FM channel equalizer designed to eliminate multipath fading and deliver optimal performance under complex multipath interference conditions present in urban settings. (ea/10,000; Si4770, $5.26; Si4777 $6.31; Si4770-A-EVB evaluation board, $500; Si4770Module-A-EVB,$150. available now)

By Christina Nickolas

Silicon Laboratories , Austin , TX
Information 512-416-8500
www.silabs.com