DESCRIPTION

· The NAU8224 is a stereo, high-efficiency, filter-free Class-D audio amplifier capable of driving a 4Ω load with up to 3.1W output power.

· It features a chip enable pin with extremely low standby current and a fast start-up time of 3.4ms.

· The device offers a flexible 2-wire interface with gain settings ranging from 24dB to -62dB (plus mute).

· Ideal for portable battery-driven applications, it boasts 87dB PSRR, 91% efficiency, ultra-low quiescent current (2.1mA at 3.7V for 2 channels), and superior EMI performance.

· Inputs can be configured in either single-ended or differential mode.

· Available in a Miniature QFN-20 package.

FEATURES

· Low Quiescent Current: 2.1mA at 3.7V for 2 channels, 3.2mA at 5V for 2 channels.

· Gain Setting: 24dB to -62dB (plus mute) via 2-wire interface and GS pin.

· Powerful Stereo Class-D Amplifier: 2ch x 3.1W (4Ω @ 5V, 10% THD+N), 2ch x 1.26W (4Ω @ 3.7V, 1% THD+N), 2ch x 1.76W (8Ω @ 5V, 10% THD+N), 2ch x 0.76W (8Ω @ 3.7V, 1% THD+N).

· Low Output Noise: 20 µV RMS @ 0dB gain.

· 87dB PSRR @217Hz.

· Low Current Shutdown Mode.

· Click-and-Pop Suppression.

APPLICATIONS

· Notebooks / Tablet PCs.

· Personal Media Players / Portable TVs.

· MP3 Players.

· Portable Game Players.

· Digital Camcorders.