Products : Portable Audio Amplifiers

 

Further information

WM9081 : Mono DAC with Integrated 2.6W Class AB/D Amplifier

 
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WM9081 Block Diagram zoom

FEATURES

  • High-power, high performance DAC and speaker driver
    - 92dB SNR (‘A-weighted’) in Class D mode
    - 97dB SNR (‘A-weighted’) in Class AB mode
    - <0.05% THD+N @0.5W continuous into 4Ω (Class D)
    - <0.10% THD+N @2W continuous into 4Ω (Class D)
    - 2.6W maximum peak power
  • ReTune Mobile Parametric Equalizer
    - Fully programmable filter coefficients
  • Programmable dynamic range controller
    - Boosts small signals to maximise loudness
    - Protects against battery droop and clipping
  • Speaker common mode boost
    - Maximises power for a given SPKVDD/AVDD ratio
  • Low power FLL
    - Provides all necessary internal clocks
    - 32kHz to 27MHz input frequency
  • All common sample rates from 8kHz to 96kHz supported
  • Standard 2-wire, 3-wire, 4-wire and hardware control modes
  • Data formats: LJ, RJ, I2S, DSP, all with TDM support
  • Thermal shutdown interrupt
  • 4x4 COL package (0.45mm lead pitch)
  • Operating temperature range: -40°C to 85°C

DESCRIPTION

The WM9081 is designed to provide high power output at low distortion levels in space-constrained portable applications.

ReTune Mobile Parametric EQ with fully programmable coefficients is integrated for optimization of speaker characteristics. Programmable dynamic range control is also available for maximizing loudness, protecting speakers from clipping and preventing premature shutdown due to battery droop.

Digital input enables the power drivers to be located close to the speakers in multi-channel systems without the need for troublesome long analogue connections. Location of the power drivers close to the speakers also removes the need for bulky and expensive class D filters and reduces PCB track lengths, minimising emissions. The digital input can also help to minimise crosstalk to the speaker output signal from high gain microphone inputs, enhancing stability and reducing the risk of ‘howling’ during speakerphone operation.

Four control interface addresses and four-channel TDM are supported to allow multiple devices to be configured and driven independently.

The device is controlled via a standard 2-wire, 3-wire, or 4-wire control interface or by hardware control pins.

 

PRICE AND AVAILABILITY

Datasheets

 
 
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