austriamicrosystems Launches Highly Integrated Ambient Noise Cancelling Speaker Drivers

Dramatically improves listening quality in mobile accessories with minimal impact on power

In a move contrary to the trend to increasing digitalisation, austriamicrosystems has launched two Active Noise Cancelling (ANC) ICs for mobile accessories such as headphones using fully analogue designs. The AS3410 and AS3430 provide industry’s lowest BOM cost and low power consumption through a high level of functional integration through reducing low frequency noise on the receive path.

The AS3410 ANC IC is ideally suited for feed-forward topology enabling small, cost-effective solutions targeting on-ear and in-ear devices. The AS3430 addresses feedback topologies resulting in end products with superior noise cancelling capabilities but with a more complex design. Both devices include; mic pre-amps, filter op amps, true ground headphone amp, mic gain calibration, LED driver, volume control and an assisted hearing mode. These features enable PCB space savings of up to 50% as compared to discrete implementations.

The AS3410 and AS3430 Active Noise Cancellation ICs provide a level of performance unmatched by competitive solutions with more than 20 dB noise reduction achievable and SNR of more than100 dB and THD of 0.1%. Running off a single AAA battery these devices support operating life of more than 100 hours, making them well suited for headsets for mobile phones, music players, netbooks and eTablets.

“With an extensive set of development tools and comprehensive documentation, these new ANC products enable rapid prototyping and system optimization, simplifying development and reducing time to market,“ said Oliver Jones, austriamicrosystems’ Marketing Manager for Audio products. “In addition, this expansion to our existing Active Noise Cancelling portfolio simplifies the production process for headsets due to the integrated calibration feature and reprogrammability.“

The AS3410 is available in a 24-pin 4x4 mm QFN package and is priced at $2.55 for 1000 piece quantities. The AS3430 is housed in a 32-pin 5x5 mm QFN package and is priced at $4.55 for 1000 piece quantities. Both operate from a 1.0 to 1.8 V supply over a temperature range of -20 to +85 °C.

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