描述 Description

The AK4951 is a low power 24-bit stereo CODEC with a microphone, headphone and speaker amplifiers. The AK4951 supports sampling frequency from 8kHz to 48kHz. It is suitable for a wide range of application from speech signal processing for narrowband, wideband and super wideband to sound signal processing for audio band. The input circuits include a microphone amplifier, an automatic wind noise reduction filter of the proprietary algorithms and a high performance digital ALC (automatic level control) circuit, therefore the AK4951 can record with high-quality sound regardless of whether indoors or outdoors. In addition, the output circuits include a cap-less headphone amplifier with a negative voltage generated by charge pump circuit and a speaker amplifier with 1W output power. It is suitable for various products as well as portable applications with recording/playback function.  
The AK4951 are available in a small 32-pin QFN (4mm x 4mm, 0.4mm pitch: AK4951AEN) and a 32-pin BGA (3.5mm x 3.5mm, 0.5mm pitch: AK4951EG) packages saving mounting area on the board.
 
 · Applications: IP Cameras, Digital Cameras, IC Recorders, Tablets, Wireless Headphones, Headsets