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
