Zarlink Semiconductor has introduced the ZL38002 acoustic echo canceller with enhanced noise reduction delivers superior sound quality for hands-free communications, including car kits, speakerphones, security and intercom systems. The device uses an adaptive algorithm that constantly tracks and reduces background noise while preserving high voice quality. Voice signals are transmitted in both directions, allowing natural two-way conversation, even when signal levels are low. The chip utilizes an advanced non-linear process design supporting full-duplex speech with no switched loss of the signal path. Zarlink’s algorithm design operates during double-talk situations when both callers are speaking at the same time. Programmable noise reduction allows the user to adjust the noise cancellation level to meet system requirements without distorting the audio signal. The acoustic echo canceller integrates other features to ensure high sound quality, including anti-howling detection that identifies instability in the audio path and automatically takes preventative measures to avoid oscillation.

Availability, packaging and price

The ZL38002 device is now available in a 36-pin QSOP (quarter small outline package) and 48-pin TQFP (thin quad flat package) chip measuring 7 mm x 7 mm. Lead-free package options are also available. The chip is supported by an evaluation board, hands-free car kit application board and API software. In quantities of 1,000, the device is priced at US$5.50.