AS1706 Audio Amplifier IC

Description

The AS1701 and AS1706 are 1.6W bridged audio power amplifiers that provide excellent circuit reliability, providing a very low-cost solution by eliminating external components when used with 2.7V to 5.5V powered circuits. The devices have superb total harmonic distortion (THD) at highpower output and excellent power supply rejection with 4Ω and 8Ω loads. Integrated over-temperature and over-current protection circuitry switch the devices off in case of an output short-circuit.

A digital input allows the devices to automatically switch into shutdown mode. Click- and pop suppression circuitry reduces audible clicks and pops during power-up and shutdown. The gain (AV) of the devices is controlled using external resistors. The AS1701/AS1706 are pin compatible with the LM4891 and the MAX9716.

The AS1701/AS1706 are available in an 8-pin MSOP package.

Key Features

• 1.6W Output Power
• 2.7V to 5.5V (VDD) Single-Supply Operation
• 65dB PSRR @ 217Hz
• THD+N: 1.6W into 4Ohm at 1%
• No Output Coupling Capacitors Required
• External Gain Configuration Capability
• 10nA Low-Power Shutdown Mode (AS1701 Active-High, AS1706 Active-Low)
• Click and Pop Suppression
• Pin-Compatible with National Semiconductor LM4891 and Maxim MAX9716
• Over-Temperature and Over-Current Protection
• Operating Temperature Range: -40°C to +85°C
• 8-pin MSOP Package

Applications

The AS1701/AS1706 are ideal as audio front-ends for battery powered audio devices such as MP3 and CD players, mobile phones, PDAs, portable DVD players, External portable Speakers, Baby Phones, Walkie-Talkies and any other hand-held battery-powered device.

The AS1701/AS1706 are also a great match for audio output in Medical and Industrial Devices or White Goods.

Block Diagram