DESCRIPTION
FEATURES
External component requirements are reduced as no separate microphone or headphone amplifiers are required. An integrated video buffer is provided which has programmable gain from 0-6dB, sync-tip clamp and a 3rd order input low pass filter for signal re-construction. 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’. An internal PLL can generate all required audio clocks for the Codec from common reference clock frequencies, such as 12MHz and 13MHz. The WM8980 operates at analogue supply voltages from 2.5V to 3.3V, although the digital core can operate at voltages down to 1.62V to save power. The speaker outputs and OUT3/4 line outputs can run from a 5V supply if increased output power is required.
Wolfson Microelectronics plc
