Single-Chip Audio Subsystem Supports Voice And Digital Audio

Contained within the LM4930 Boomer audio subsystem IC are a stereo I²C digital-to-analog converter, voiceband codec, stereo headphone amp, mono speaker amp, microphone preamp, and sidetone generator, all with I²C control. The 36-bump microSMD device offers three digital interfaces: pulse-code modulation for digital voice data, I²S for digital stereo audio from sources such as MP3, and an I²C interface. The latter sets the mode of operation, volume levels, and other functions. Pricing is $3.95 each in quantities of 1000.