Mono DAC

Wolfson Microelectronics has announced the WM9081, a single-chip mono DAC and speaker amplifier, suitable for delivering optimum sound pressure levels and maximum intelligibility from low-cost speakers, typically used in portable navigation devices, mobile handsets, digital radios and conference speakerphones.

The device benefits from an integrated high-efficiency 2.6 W switchable class AB/D speaker amplifier, dynamic range controller and five-band parametric equaliser.

The DAC achieves audio performance of 92 dB SNR in Class D mode and 1% THD+N at 2.4 W output power into 4 Ω speaker loads.

It integrates the equaliser with fully programmable coefficients allowing speaker frequency response compensation and music profiles to be defined by the user.

Programmable dynamic range control is integrated to help boost low-level signals to maximise volume for improved intelligibility. The device features a limiter designed to prevent audio signal clipping and distortion.

The DAC supports four control interface addresses and four-channel TDM to allow multiple devices to be configured and driven independently. Controlling the device is done via a standard two-, three- or four-wire control interface or by hardware control pins.