WM8758B Datasheet | Wolfson Microelectronics

DESCRIPTION FEATURES 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 ponent requirements are reduced as no separate microphone or headphone amplifiers are required. Headphone and line mon feedback improves crosstalk and noise performance. Advanced on-chip digital signal processing includes a 5-band equaliser, a mixed signal Automatic Level Control for the microphone or line input through the ADC as well as a purely digital limiter function for record or playback. Additional digital filtering options are available in the ADC path, to cater for application filtering such as ‘wind noise reduction’ and notch filter. The WM8758B digital audio interface can operate in master or slave mode with an integrated PLL. The WM8758B operates at analogue supply voltages from 2.5V to 3.3V, although the digital supply voltages can operate at voltages down to 1.71V to save power. Additional power management control enables individual sections of the chip to be powered down under software control. Stereo CODEC: - DAC SNR 100d B, THD -86d B (‘A’ weighted @ 48k Hz) - ADC SNR 92.5d B, THD -75d B (‘A’ weighted @ 48k Hz) - Headphone Driver - 40m W 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 mon 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 (k Hz): 8, 11.025, 12, 16, 22.05, 24, 32, 44.1, 48 -...