WM8731 - Wolfson Microelectronics plc

WM8731 Portable Internet Audio CODEC

The WM8731 or WM8731L (WM8731/L) are low power stereo CODECs with an integrated headphone driver. The WM8731/L 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. Stereo line and mono microphone level audio inputs are provided, along with a mute function, program.

Features

including volume controls, mutes, de-emphasis and extensive power management facilities. The device is available in a small 28lead SSOP package or the smaller 28 lead quad flat leadless package (QFN). BLOCK DIAGRAM FEATURES
 Highly Efficient Headphone Driver
 Audio Performance - ADC SNR 90dB (‘A’ weighted) at 3.3V, 85dB at 1.8V - DAC SNR 100dB (‘A’ weighted) at 3.3V, 95dB at 1.8V
 Low Power - Playback only 22mW, 8mW (‘L’ Variant) - Analogue Pass Through 12mW, 3.5mW (‘L’ variant) - 1.42
  – 3.6V Digital Supply Operation - 2.7
  – 3.6V Analogue Supply Operation - 1.8
  – 3.6V Analogue Supply Opera.