Broadcast audio ICs streamline design of wheel-tuned radios

Broadcast audio ICs streamline design of wheel-tuned radios

The Si484x multi-band radio receiver IC solution will modernize wheel-tuned radio products with digital displays.Based on a patented low-IF digital architecture, the receivers are claimed to offer unmatched integration in CMOS, reducing radio component count by more than 70%.

Competitive solutions use frequency counter ICs to approximate the tuned frequency of traditional analog ICs. With this approach, the actual tuned frequency could be significantly different from the displayed frequency, leading to a frustrating tuning experience for radio users. The Si484x family addresses these challenges by providing precise mechanical tuning that enables radio users to hear the exact channel that is being displayed.

The Si484x receivers deliver unsurpassed RF performance in the worldwide AM/FM/SW bands, as well as audio features that are unmatched by competing radio ICs. The receivers’ automatically tuned RF front-end circuitry adjusts to reject noise and amplify the target signal for exceptional sensitivity in weak signal conditions. The ICs also enable display indicators for valid stations, mono/stereo signals and tuned frequency. Housed in 24-pin SSOP pacakges, they also include digital volume control, soft mute and bass/treble audio control.(From $1.81 ea/10,000 — available now.)

By Christina Nickolas

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