DESCRIPTION

The WM8941 is a low power, high quality mono CODEC designed for portable applications such as digital still cameras or camcorders.

The device integrates support for a differential or single ended mic, and includes drivers for speakers or headphone, and mono line output. External component requirements are reduced as no separate microphone or headphone amplifiers are required. A high performance, low power current-mode video buffer provides inherent short circuit protection.

FEATURES

• Mono CODEC:

• Audio sample rates:8, 11.025, 16, 22.05, 24, 32, 44.1, 48kHz

• DAC SNR 98dB, THD -84dB (‘A’-weighted @ 8 – 48ks/s)

• ADC SNR 94dB, THD -80dB (‘A’-weighted @ 8 – 48ks/s)

• On-chip Headphone/Speaker Driver

- 40mW output power into 16Ω

- BTL speaker drive 0.4W into 8Ω

• Additional MONO Line output

• Multiple analog or ‘Aux’ inputs, plus analog bypass path

• Mic Preamps :

• Differential or single end Microphone Interface

- Programmable preamp gain

- Pseudo differential inputs with common mode rejection

- Programmable ALC / Noise Gate in ADC path

• Low-noise bias supplied for electret microphones

OTHER FEATURES

• Integrated video buffer with LPF and clamp.

• Digital Playback Limiter

• Programmable high pass filter (wind noise reduction)

• 4 notch filters (narrowband noise suppression)

• On-chip PLL

• Low power, low voltage

- 2.5V to 3.6V (digital: 1.71V to 3.6V)

• 4x4x0.75mm 28 lead QFN package

APPLICATIONS

• Digital still cameras and camcorders

• General purpose mono audio CODEC with video buffer