DESCRIPTION
The WM8731 is a low power stereo CODEC with an integrated headphone driver. It offers the user the unique ability to independently program the ADC and DAC sample rates from a single clock source. The WM8731 is designed specifically for portable MP3 audio and speech players and recorders. The WM8731 is also ideal for MD, CD-RW machines and DAT recorders.

FEATURES
• Audio Performance
    − 97dB SNR (‘A’ weighted @ 48kHz) ADC
    − 100dB SNR (‘A’ weighted @ 48kHz) DAC
    − 1.42 – 3.6V Digital Supply Operation
    − 2.7 – 3.6V Analogue Supply Operation
• ADC and DAC Sampling Frequency: 8kHz – 96kHz
• Selectable ADC High Pass Filter
• 2 or 3-Wire MPU Serial Control Interface
• Programmable Audio Data Interface Modes
    − I2S, Left, Right Justified or DSP
    − 16/20/24/32 bit Word Lengths
    − Master or Slave Clocking Mode
• Stereo Audio Inputs and Outputs
• Microphone Input and Electret Bias with Side Tone Mixer
• Input and Output Volume and Mute Controls
• Highly Efficient Headphone Driver
• Playback Mode Power Consumption < 18mW
• Analogue Pass Through Power Consumption < 9mW
• 28-Pin SSOP Package

APPLICATIONS
• Portable MP3 Players and Recorders
• CD and Minidisc Recorders