Portable Audio

Part No. WAU8822
Datasheet  WAU8822.pdf
Description The WAU8822 is a low power, high quality stereo CODEC designed for portable and general purpose applications. In addition to precision 24-bits stereo ADCs and DACs, this device integrates many additional functions to simplify implementation of full audio systems with very low parts count. The WAU8822 includes eight analog inputs, including a low-noise differential stereo microphone input, and analog output drivers for loudspeaker, headphones, and a high-current stereo line output. Outputs can be flexibly configured for single ended or differential operation.

Advanced on-chip digital signal processing includes a 5-band equalizer, 3-D spatialization, mixed-signal Automatic Level Control (ALC/limiter), and DAC output path automute and dynamic range compression (DRC). The ADC path also includes a parametric notch filter and high pass filters for input signal conditioning, including wind noise reduction. An internal fractional-N PLL can seamlessly support any audio clock rate from 8kHz through 48kHz using any available clock from 8MHz through 33MHz.

The WAU8822 operates with analog supply voltages from 2.5V to 3.6V, and the digital core can operate as low as 1.7V to minimize power. The speaker outputs and stereo line outputs can run from a 5V supply for increased output. The WAU8822 is specified for operation from -40 ° C to +85 ° C, and is available with full automotive AEC-Q100 & TS16949 qualification. It is packaged in a space-saving 32-lead QFN package.

For additional information about our new WAU8822 Stereo Audio CODEC, please Contact Sales
Features 24-bit high performance stereo CODEC with digital signal processing
  • Audio DAC: 94dB SNR and -84dB THD
  • Audio ADC: 90dB SNR and -80dB THD
  • Advanced integrated signal processing feature set
    - 5-band equalizer
    - mixed-signal Automatic Level Control (ALC / Limiter)
    - parametric notch filter
    - programmable high pass filter
    - output Dynamic Range Compression (DRC / Limiter) with Automute, Softmute
    - zero crossing detection, automute, softmute, digital ADC-to-DAC passthrough
    - optional A-Law or u-Law companding for telephony
  • Support s any sample rate from 8kHz through 48kHz with 64x or 128x oversampling
Analog Inputs and Outputs
  • Low distortion BTL Speaker Driver 1.0W into 8Ω @ 5V
  • Stereo Headset Driver, 40mW into 16Ω @ 3.3V
  • High current stereo line output driver, 40mW into 16Ω @ 3.3V
  • Outputs flexibly configurable for up to two differential output pairs
  • Low noise, high gain stereo differential microphone amplifier
  • Low noise programmable microphone bias supply voltage
  • Two additional stereo line level input pairs (four additional analog inputs)
Interfaces
  • I2S or PCM audio bus support with all commonly used variations
  • 2-wire protocol compatible with I2C, with register readback capability
  • 3-wire/4-wire SPI control interface, with register readback capability
Low Power, Low Voltage
  • Analog Supply: 2.5V to 3.6V
  • Speaker/Line Power Supply: 2.5V to 5V
  • Digital Supply: 1.7V to 3.6V
Additional features
  • Fractional-N PLL can generate any audio clock from common system clocks
  • Powerful and flexible analog mixing, routing, selection, and bypass features
  • Industrial temperature range: –40 ° C to +85 ° C
  • Fully qualified for automotive applications: AEC-Q100 & TS16949
  • PCM Time Slot Assignment for shared audio bus and multiplexing
Diagram  
Package 32-QFN
Other Files N/A
Development Tools Evaluation Board with advanced GUI user interface
Others N/A

Contact us: Audio@nuvoton.com