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WM8758B

Wolfson Microelectronics
Part Number WM8758B
Manufacturer Wolfson Microelectronics
Published Dec 23, 2014
Description Stereo CODEC
Detailed Description w WM8758B Stereo CODEC with Headphone Driver and Line Out DESCRIPTION FEATURES The WM8758B is a low power, high qua...
Datasheet PDF File WM8758B PDF File

WM8758B
WM8758B


Overview
w WM8758B Stereo CODEC with Headphone Driver and Line Out 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 component requirements are reduced as no separate microphone or headphone amplifiers are required.
Headphone and line common 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 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 r...


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