Anpac Semiconductor Ltd.

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AP1088 -Headphone Amplifier with Active Noise Cancellation

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General Descriptions :

The AP1088 is a differential input and differential output mono headphone amplifier. It is capable of delivering 40mW average power into 8Ω BTL loads with 0.08% THD+N. The device operates from 2.5V to 5V.

The active 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 a properly configured and +/-0.5dB matched microphones.

The AP1088 consumes only 1.8mA 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 1.8mA (typ)
  • Standby current 0.1uA (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)

(microphone) 95dB (typ)



Features :


  • Active noise cancellation up to 35dB
  • Ultra low power consumption
  • Space-saving package (5mmx5mm 28 QFN)
  • Low external component count and costs
  • High audio quality
  • Excellent RF immunity
  • Differential inputs and outputs
  • Adjustable 3dB to 39dB 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