Highly integrated active noise reduction solution (Austrian Microelectronics)

Austriamicrosystems has released two AS3501 and AS3502 products in its high-performance audio range. These innovative ICs help the design of active noise reduction solutions at the receiving end for superior system performance and low power consumption.

This article refers to the address: http://

The AS3501 is a highly integrated, cost-competitive solution for feedforward noise reduction; the AS3502 is a solution for feedback active noise reduction. In a feedback active noise reduction system, the microphone is built into the headphones. Inside the place near the horn. Powered from a single 1.0V to 1.8V supply, the two ICs combine an absolute headphone amplifier with a flexible noise reduction structure that typically reduces the number of original devices by 60% compared to most integrated solutions on the market. User-definable internal register settings enable different configurations, providing a differentiated and flexible design for a broad portfolio.

Both devices work independently and the stand-alone mode of operation is suitable for accessory design. It also works in embedded mode for integration in music players and other portable multimedia devices. The highly integrated design reduces board area by at least 50% compared to competing solutions. The optimized system architecture provides excellent power performance and significantly extends user battery life.

Oliver Jones, Marketing Manager of the Austrian Microelectronics Audio Division, said: "In the course of a business trip or on the way to and from work, you can experience the impact of environmental noise on listening to music or making phone calls. Austrian Microelectronics AS3501 and AS3502 active noise reduction solutions By effectively reducing external noise, the dynamic range of the sound played through the headphones is significantly improved, which means that the clarity of the call and listening to the music is improved without having to excessively increase the volume. In fact, you may even need to turn down the volume. There is no compromise between the sound quality and noise reduction features of our solutions, combining superior system performance, simplified manufacturing and innovative features, and low power consumption for portable, high-quality audio applications."

The AS3501 and AS3502 drive up to 34mW in single-ended mode and over 100mW in bridged conditions when driving a 16Ω speaker from a 1.5V supply. Both devices achieve active noise reduction while maintaining excellent sound quality, ensuring signal-to-noise ratio (SNR) >100dB and total harmonic distortion (THD) <0.1%. Existing active noise reduction solutions often generate artificial noise when activated, and the AS3501 and AS3502 can solve this problem well and have a competitive advantage. In addition, the patented innovative calibration solution eliminates the need for manual intervention during manufacturing, improving field reliability and avoiding the challenges typically found in today's best-in-class solutions.

The AS3501 is available in a 24-lead 4x4mm QFN package and the AS3502 is available in a 32-pin 5x5mm QFN package. Both devices are suitable for operating temperatures from -20°C to +70°C.

Touch Panel

Touch Panel,Touch Screen Panel,Infrared Touch Screen

Guangzhou Baiyun Shijing Quanchutong Electronic Factory , http://www.gztouchpanel.com

Posted on