General Description

The AS1702 - AS1705 are single-channel differential audio power-amplifiers designed to drive 4 and 8Ω loads. The integrated gain circuitry of these amplifiers and their small size make them ideal for 2.7- to 5V-powered portable audio devices. The differential input design improves noise rejection and provides common-mode rejection. A bridge-tied load (BTL) design minimizes external component count, while providing high-fidelity audio power amplification.

Key Features

2.7 to 5.5V (VCC) Single-Supply Operation

THD+N: 1.8W into 4Ω at 1% (per Channel)

Differential Input

Adjustable Gain Option (AS1702)

Internal Fixed Gain to Reduce External Component Count (AS1703, AS1704, AS1705)

<100nA Low-Power Shutdown Mode

Click and Pop Suppression

Pin-Compatible to National Semiconductor LM4895 (AS1705) and Maxim MAX9718A/B/C/D

Operating Temperature Range: -40 to +85ºC

Package Types

  - 10-pin MSOP

  - 10-pin DFN

Applications

The devices are ideal as audio front-ends for battery powered audio devices such as MP3 and CD players, mobile phones, PDAs, portable DVD players, and any other hand-held battery-powered device.