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AK4954A - 32bit Stereo CODEC

General 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.

Key Features

  • 1. Recording Function.
  • 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 Amplifier =0dB).
  • Two Types of Decimation Filters.
  • Ov.

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Other Datasheets by AKM (Asahi Kasei Microdevices)

Part Number Description
AK4950 24bit Stereo CODEC
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AK4951A 24bit Stereo CODEC
AK4953A 24bit Stereo CODEC
AK4955 24bit Stereo CODEC

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
[AK4954A] AK4954A 32-bit Stereo CODEC with MIC/HP/SPK-AMP GENERAL 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. The integrated charge pump circuit generates a negative voltage and removes the output AC coupling capacitors. The speaker amplifier has a wide operating voltage range, which is from 0.9V to 5.5V, enabling a direct drive to batteries. The AK4954A is available in a small 32-pin QFN (4x4mm 0.