Audio Amplifiers from austriamicrosystems are pin-compatible with National and Maxim

The AS 1701/06 family of single-channel audio amplifiers from austriamicrosystems are available in 8-pin MSOP package and are pin-compatible with National’s LM4890 and Maxim’s MAX9716.

According to austriamicrosystems, the amplifiers offer higher output power (1.6W) at comparable distortion levels, or lower distortion levels at comparable output power than similar products. The AS1701 and AS1706 are targeted for use in audio front-ends for battery powered audio devices, such as MP3, CD and DVD players, mobile phones, PDAs, portable speakers and other handheld battery-powered devices.

The AS1701/06 family contains a bridge-tied load (BTL) output stage to differentially drive 4 Ohm and 8 Ohm speakers. The amplifiers offer low distortion with 0.05% THD+N at 1W output power into an 8 Ohm load. At THD+N of 1% they deliver 1.6W output power into a 4-Ohm load or 1.2W into an 8 Ohm load. Due to the wide input supply range of 2.7-5.5V the amplifiers can be used for 3V systems as well delivering 600mW continuous output power into 4 Ohm. With a low power-supply rejection ratio (PSRR) the AS1701/06 can be used without a linear regulator even with a noisy digital supply. Gain levels can be adjusted via external components offering utmost flexibility for system design.

These amplifiers include an integrated shutdown circuitry that disables the bias generator and amplifiers, and reduces quiescent current consumption to less than 10nA. The power down mode can be entered via digital control signal. Click-and-pop suppression circuitry reduces audible clicks and pops during power-up and shutdown.