AK4954A Description
The AK4954A is a low power consumption 32-bit stereo CODEC with a microphone, a headphone and a speaker amplifiers. The input circuits include a microphone amplif ier and an ALC (Automatic Level Control) circuit, and the output circuits include a cap-less headphone amplifier and a speaker amplifier. It is suitable for portable application with recording/playback function.
AK4954A Key Features
- Two Low Noise Microphone Power Supplies
- Stereo Single-ended input with three Selectors
- Low Noise Microphone Amplifier (+26dB/+20dB/+13dB/+6dB/0dB)
- Digital ALC (Automatic Level Control) (Setting Range: +36dB ∼ -52.5dB, 0.375dB Step)
- ADC Performance: S/(N+D): 88dB, DR, S/N: 97dB (Microphone Amplifier =+20dB) S/(N+D): 88dB, DR, S/N: 100dB (Microphone Am
- Two Types of Decimation Filters
- Overflow Detection
- Wind-noise Reduction Filter
- Stereo Separation Emphasis Circuit
- 5-band Notch Filter