WM8991 Datasheet | Wolfson Microelectronics

DESCRIPTION The WM8991 is a highly integrated ultra-low power hi-fi codec designed for handsets rich in multimedia features such as mobile TV, digital audio playback and gaming. Ultra-low power and low noise interfaces to many other audio ponents in the system are provided. A powerful 1W speaker driver can operate in class D or AB modes, providing total flexibility to the system designer. Low leakage, high PSRR and pop/click suppression enable direct battery connection for the speaker supply. A very highly flexible input configuration supports multiple microphone or line inputs (mono or stereo, single-ended or differential). Four headphone drivers support fully differential headset drive, providing excellent crosstalk performance and bass response, maximising stereo effects, and allowing the removal of large and expensive headphone capacitors. Stereo 24-bit sigma-delta ADCs and DACs provide hi-fi quality audio record and playback, with a flexible digital audio interface supporting most monly-used clocking schemes. An integrated low power PLL, an alternative DAC interface and TDM support provide additional flexibility. The WM8991 is supplied in very small and thin 5x5mm 65-ball BGA package, ideal for use in portable systems. FEATURES DAC SNR 99d B (‘A’ weighted), THD -84d B at 48k Hz, 3.3V ADC SNR 94d B (‘A’ weighted), THD -82d B at 48k Hz, 3.3V Microphone interface (Up to four differential microphones) 1W Speaker driver - 1W into 8Ω BTL speaker at <0.1% THD - 80d B PSRR @217Hz - <1u A leakage with direct battery connection - Software-selectable class D or AB mode - Filterless connection supported - Pop/Click suppression Headphone / ear speaker drivers - 40m W output power into 16Ω at 3.3V - Fully differential and capless modes supported - Pop/Click suppression 4 Mono or stereo differential line outputs Powerful GPIO functions Ultra-low power consumption - 8.3m W analogue voice call - 13.7m W DAC playback to headphones On-chip PLL provides flexible clocking scheme...