austriamicrosystems Intros AS1702/3/4/5 Power Amplifiers
austriamicrosystems AG (Graz, Austria) introduced its new AS1702/3/4/5 family of 1.6 W single-channel audio power amplifiers, which are suitable as front-ends for battery-powered audio devices, such as MP3 and CD players, mobile phones, PDAs, portable DVD players, and other hand-held, battery-powered devices.
The amplifiers are designed to drive 4 W and 8 W loads and the integrated gain circuitry, and the small size makes them suitable for 2.7 V to 5 V powered devices. Different gain levels for the AS1702/3/4/5 – adjustable gain via external components of 0 dB, 3 dB and 6 dB, respectively – facilitate reduced component designs. A differential input design improves noise and common-mode rejection, while a bridge-tied load design minimizes external component count, while providing power amplification. The integrated shutdown circuitry disables the bias generator and amplifiers, and reduces quiescent current consumption to less than 100nA.
The devices are available in a 10-pin MSOP package, and are pin-compatible with LM4895 (AS1705), TS4994 (AS1702) and MAX9718A/B/C/D. Pricing begins at $0.70 in quantities of 1,000 units.
