ams AG - global leader in the design and manufacture of high performance analog ICs (integrated circuits)

AS3421 Active Noise Cancellation

Low power ambient noise cancellation speaker driver

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Integrated Active Noise Cancellation solution addressing feedforward architecture for Stereo wireless headsets, suitable for music, video or mobile use.

Key Features

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

Key Benefits

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

Product Facts

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, 32Ohm) [dB] >100, <0.1%
ANC performance [dB] >25
Supply voltage [V] 1.0 to 1.8
Package QFN-24 (4x4)

Additional Information


The devices are ideal for wireless devices like stereo Bluetooth headsets as well as stereo wireless headsets.