DESCRIPTION
The A7023 is a cost-effective 4W-per-channel stereo filter-free Class-D audio amplifier designed with Apexone?ˉs patent pending technologies and architecture.  The chip features very low 0.02%-THD+N, high 94dB-SNR, high 92%-efficiencies and good 73dB-PSRR at 217Hz. Large output power, high efficiencies, low THD+N, high SNR, good PSRR and differential architecture together provide the best immunity to noise for portable and semi-portable devices. Integrated internal mute control function can suppress click pop sound. Additionally, the A7023?ˉs fast startup time, low shutdown current and small package size make the A7023 an ideal choice for both powered speakers and portable devices -- the A7023 can drive speakers as low as 4-Ohm or even lower.

PRODUCT FEATURES

•  2.5V to 6.5V single-supply operation
• 28 steps digital volume control from pure mute to 24dB
• selectable default starting gain of 6, 18 dB
• Low to 0.02% THD+N
• High efficiency : 87% at 2*1W at 8,5V
• Thermal and short-circuit protection
• LED drive integrated for status
• Mute function
• Pb-free SOP20 packages available

APPLICATIONS

• Multimedia speakers,
• Wireless handsets
• Digital photo frames, MP3, PMPs, GPS,
• Notebooks, MIDs, small-sized LCD monitors,
• Digital Camera