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AS3421 Active Noise Cancellation

Low power ambient noise cancellation speaker driver


  • >25dB noise reduction achievable
  • High quality audio chain
  • Fully electronic calibration
  • Differential line inputs
  • 1.0V - 1.8V supply


  • Superior performance
  • Pure, unadulterated audio
  • No manual intervention during production
  • Seamless connection to BT SoC's
  • Optimised system efficiency

Product parameters

Function Receive path
Topology Feedforward
Output Type Stereo SE
Max. Output Power (BTL, 1.8V, 32 Ohm) [mW] 32 SE: 35
SNR, THD (SE, 34mW, 32 Ohm) [dB] >100, <0.1%
ANC Performance [dB] >25
Supply Voltage [V] 1.0 to 1.8
Package QFN-24 (4x4)

General Description

Integrated active noise cancellation solution addressing feedforward architecture for stereo wireless headsets, suitable for music, video or mobile use.

This product suits for the following applications:

  • Stereo Bluetooth headsets
  • Stereo wireless headsets


Title Category Headline Buy
AS3421EvalKit Application Board Evaluation Kit for AS3421


Name Type Description Language Software Driver source v0.9.3 English

Technical Documents

Name Type Description Version Language
AS3421_22_DS000194_1-00.pdf Datasheet Document version 1.10 1-00 English
AS3421_AS3422_FS000195_1-00.pdf Factsheet Stereo Bluetooth ANC Headphone Speaker Driver 1-00 English
AS3421_PD000343_1-00.png Other Product Document AS3421EvalKit Image 1-00 English

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