austriamicrosystems announces new Active Noise Cancelling ICs for improved hearing in both Bluetooth and wired mono headsets
The AS3400 and AS3420 feature lowest power & best audio quality for wired and wireless headsets, respectively
The Active Noise Cancelling IC AS3420 is a fully differential ANC speaker driver IC specifically designed to connect directly to common SoCs for mono Bluetooth applications. It can also be used with other types of wireless headsets. The fully analog implementation reduces ambient background noise and achieves the lowest power and the best received voice quality. The AS3420 Bluetooth speaker driver can be used in both feed-forward and feedback configurations. The device allows for the development of simple low-order filters as well as complex multiple-order filters, thanks to the integrated low noise amplifiers. In addition, the microphone input features a fully differential lownoise amplifier, adjustable gain over 128 steps, and OTP (one time programmable) ROM for factory setting of gain.
Complementing the ANC IC AS3420, the AS3400 is a low-power ANC speaker driver designed to reduce ambient background noise in wired headsets and improve the quality of conversations or listening to music. Like the AS3420, the AS3400 can be configured for feedback or feed-forward operation. Both receive path ICs deliver up to 30 dB of noise reduction, provide click- and pop-less operation at start-up and during mode switching. They also include highly efficient, low THD (total harmonic distortion) headphone amplifiers -- 0.1% and 0.03% for the AS3420 and AS3400, respectively. Both driver ICs draw just 3.8 mA at 1.5 V and less than 1 ?A quiescent current in mono mode.
"How many times do you say 'Could you repeat that please, I didn't quite understand you'", commented Oliver Jones, austriamicrosystems' Marketing Manager for Audio products. "People want to stay in touch, no matter where they are. Active Noise Cancelling significantly improves listening quality even in mono applications. Solutions that implement the ANC function digitally via software enhancements require more power and do not achieve the same performance. That approach simply increases the sound volume in loud environments and, under certain conditions, distorts the caller's voice."
austriamicrosystems' AS3400 is housed in a 4 x 4 mm QFN24 package; the ANC IC AS3420 comes in a QFN20 4 x 4 mm package. Both speaker driver ICs operate with a 1.0 to 1.8 V supply and are specified over a -20 to +85°C temperature range.
Price and availability
The ANC ICs AS3400 and AS3420 are available now and are priced at $2.10 and $1.95, respectively, in 1000-piece quantities. A demo board is also available to speed development time. For more information on the new Active Noise Cancelling ICs AS3400/20 and the demo board, please visit http://www.austriamicrosystems.com/audio/ANC
austriamicrosystems is a leading designer and manufacturer of high performance analog ICs, combining almost 30 years of analog design know-how with state-of-the-art manufacturing and test facilities and production partnerships. austriamicrosystems leverages its expertise in low power and high accuracy to provide industry-leading standard and customized analog products. Operating worldwide with more than 1,200 employees, austriamicrosystems focuses on the areas of power management, sensors & sensor interfaces and mobile infotainment in its markets Consumer & Communications, Industry & Medical and Automotive. Through the combination with TAOS, a world leader in advanced light sensors, austriamicrosystems has expanded its innovative sensor offering for growth markets such as mobile devices. austriamicrosystems is listed on the SIX Swiss Exchange in Zurich (ticker: AMS). For more information, please visit www.austriamicrosystems.com
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