DESCRIPTION
The WM8940 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.

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 16
    - BTL speaker drive 0.4W into 8
• Additional MONO Line output
• Multiple analogue or ‘Aux’ inputs, plus analogue 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
• 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)
• 4x4x0.9mm 24 lead QFN package

APPLICATIONS
• Digital still cameras and camcorders
• General purpose mono audio CODEC