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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

Analog ANC solution

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


Type Description Language
Software Driver source v0.9.3 English
Software Soundcard driver English
Software Cat Box SW 2v0 English

Technical Documents

Type Description Language
Datasheet Document version 1.10 English

Environmental Documents

Type Description Language
Material Declaration Form MDF_188720012_AS3421-EQFP English

Other Information

Type Description Language
Factsheet Stereo Bluetooth ANC Headphone Speaker Driver English
Other Product Document AS3421EvalKit Image English

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