Anpac Semiconductor Ltd.

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AP1089 - Active Filtering Noise Cancellation Headphone Amplifier

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General Descriptions :

The AP1089 is a stereo headphone amplifier with active noise cancellation. It is capable of delivering 80mW average power into 8Ω BTL loads with 0.08% THD+N. The device operates from 2.5V to 4.5V.

The active filtering noise cancellation is designed to reduce the far-field ambient noise from the headphones. Up to 25dB of far-field ambient noise can be reduced with properly configured and +/-0.5dB matched microphones.

The AP1089 consumes only 2.8mA of supply current during operation. It provides superior power saving over DSP solutions which typically consume five times more power.

Key Specifications :

  • Far Field Noise Suppression (Electrical) 35dB (typ)
  • Supply current 2.8mA (typ)
  • Standby current 0.02uA (typ)
  • Signal to Noise Ratio (20Hz to 20kHz) 66dB (typ)
  • Total Harmonic Distortion + Noise (Vin=100mVpp) 0.08% (typ)
  • High PSRR @ 217Hz (headphone) 75dB (typ)
  • High PSRR @ 217Hz (microphone) 95dB (typ)


Features :

  • Active noise cancellation up to 35dB (Electrical)
  • Ultra low power consumption
  • Space-saving package (5x5mm QFN, 40 leads)
  • Low external component count and costs
  • High audio quality
  • Excellent RF immunity
  • Differential inputs and outputs
  • Adjustable microphone gain
  • Selectable microphone mute and headphone mute
  • Power-saving shutdown mode
  • Amplify ambient audio signal selection

Applications :

  • High-end headphones and headsets
  • Multi drivers headsets
  • Consumer devices headphones and earphones
  • Multimedia players
  • Ear-aid devices