Audio amplifier pair brings high-quality sound to the masses

Edinburgh, UK—Wolfson Microelectronics is offering two cost-effective audio amplifiers—the WM9090 and WM9010—that provide high quality audio and low power consumption for optimal audio playback time due to highly efficient headphone and speaker drivers.

Both devices are packaged in tiny CSP packages, resulting in an ultra small PCB footprint and require minimal external components to reduce bill of materials (BOM) cost.

The WM9090 is an audio subsystem IC and features a mono Class D speaker driver, Class G capless headphone amplifier, automatic gain control and two pairs of differential analog inputs, all delivered in a small 20-ball 2.5 x 2.0 mm CSP package.

The WM9090's on-chip mono Class D speaker amplifier delivers 750 mW into an 8 Ohm speaker at less than 1% THD+N, when powered by a 3.7 V battery supply. Wolfson's new Automatic Gain Control circuit enhances the loudspeaker-mode playback experience by preventing signal clipping and limiting speaker distortion, while maximizing the available speaker output power.

Available in a tiny 12-ball 1.8 x 1.3 mm CSP package, the WM9010 is a highly efficient Class G capless headphone amplifier, which is powered from a single 1.8 V supply and offers longer playback time over many other Class G headphone amplifiers, according to the company. Wolfson attributes this to its low quiescent power consumption and an input signal envelope detector, which enhances efficiency by tracking the signal level and dynamically adjusting the headphone amplifier power supply circuitry.

Pricing: In 10K quantities, the WM9090 is $0.50 and the WM9010, $0.35 each.
Availability: Production quantities of the WM9090 are available now; samples of the WM9010 are available now.
Datasheets: WM9090 and WM9010.

Wolfson Microelectronics, www.wolfsonmicro.com