DESCRIPTION

· The CS6422 is a single-chip solution enabling full-duplex conversation in speakerphones using echo cancellation and suppression.

· It replaces existing half-duplex speakerphone ICs, significantly improving conversation quality.

· The IC integrates telephone & audio interfaces, two codecs, and an echo-cancelling DSP.

FEATURES

· Full-duplex, hands-free operation with optional Tx Noise Guard.

· Programmable attenuation during double-talk and optional 34 dB microphone preamplifier.

· Dual channel AGC’ed volume controls with mute and dual integrated 80 dB IDR codecs.

· Speech-trained Network and Acoustic Echo Cancellers with Rx and Tx supplementary echo suppression.

· Configurable half-duplex training mode and powerdown mode with a microcontroller interface.

APPLICATIONS

· Modern speakerphones requiring full-duplex operation.

· Systems needing enhanced conversation quality over traditional half-duplex speakerphones.

· Applications requiring integrated echo cancellation and suppression in a single-chip solution.