ZL38002

www.DataSheet4U.com ZL38002 Digital Echo Canceller for Hands Free Communication Data Sheet Features 112 ms acoustic echo canceller Up to 12 dB of noise reduction Works with low cost voice codec. ITU-T G.711 or signed mag µ/A-Law, or linear 2’s compliment Each port may operate independently in companded format or linear format Advanced NLP design - full duplex speech with no switched loss on audio paths Fast re-convergence time: tracks changing echo environment quickly Adaptation algorithm converges even during Double-Talk Designed for exceptional performance in high background noise environments Provides protection against narrow-band signal divergence Howling prevention stops uncontrolled oscillation in high loop gain conditions Programmable offset nulling of all PCM channels Serial micro-controller interface Idle channel noise suppression ST-BUS, GCI, or variable-rate SSI PCM interfaces Limiter ADV NLP January 2007 Ordering Information ZL38002QDG ZL38002QDG1 ZL38002DGE1 ZL38002DGF1 48 48 36 36 TQFP Trays TQFP* Trays QSOP* Tubes, Bake & Drypack QSOP* Tape & Reel, Bake & Drypack *Pb Free Matte Tin -40 ° C to 85 ° C Pin Pin Pin Pin User gain control provided for speaker path (-24 dB to +21 dB in 3 dB steps) Adjustable gain pads from -24 dB to +21 dB at Xin, Sin and Sout to compensate for different system requirements AGC on speaker path Handles up to -6 dB acoustic echo return loss (with the appropriate gain pad settings) Trans...