DESCRIPTION

The WM8758B is a low power, high quality stereo CODEC designed for portable applications such as MP3 audio player.

The device integrates preamps for stereo differential mics, and drivers for headphone and differential or stereo line output. External component requirements are reduced as no separate microphone or headphone amplifiers are required. Headphone and line common feedback improves crosstalk and noise performance.

FEATURES

Stereo CODEC:

• DAC SNR 100dB, THD -86dB (‘A’ weighted @ 48kHz)

• ADC SNR 92.5dB, THD -75dB (‘A’ weighted @ 48kHz)

• Headphone Driver

• 40mW per channel output power into 16 / 3.3V AVDD2

• Line output

Mic Preamps:

• Stereo Differential or mono microphone Interfaces

• Programmable preamp gain

• Psuedo differential inputs with common mode rejection

• Programmable ALC / Noise Gate in ADC path

• Low-noise bias supplied for electret microphones

Other Features:

• Enhanced 3-D function for improved stereo separation

• Digital playback limiter

• 5-band Equaliser (record or playback)

• Programmable ADC High Pass Filter (wind noise reduction)

• Programmable ADC Notch Filter

• PLL supporting various clocks between 8MHz-50MHz

• Sample rates supported (kHz): 8, 11.025, 12, 16, 22.05, 24, 32, 44.1, 48

• Low power, low voltage

• 2.5V to 3.6V analogue supplies

• 1.71V to 3.6V digital supplies

• 5x5mm 32-lead QFN package

APPLICATIONS

• Portable audio player