NAU8224 Datasheet, PDF (1/27 Pages) List of Unclassifed Manufacturers – 3.1W Stereo Filter-Free Class-D Audio Amplifier with 2 wire interface gain control

NAU8224
3.1W Stereo Filter-Free Class-D Audio Amplifier
with 2 wire interface gain control
1 Description
The NAU8224 is a stereo high efficiency filter-free Class-D audio amplifier, which is capable of driving a 4Ω load with
up to 3.1W output power. This device provides chip enable pin with extremely low standby current and fast start-up time
of 3.4ms. The NAU8224 features a highly flexible 2 wire interface with many useful gain settings. The gain can be
selected from 24dB to -62dB (plus mute) by using 2 wire interface and GS pin.
The NAU8224 is ideal for the portable applications of battery drive, as it has advanced features like 87dB PSRR, 91%
efficiency, ultra low quiescent current (i.e. 2.1mA at 3.7V for 2 channels) and superior EMI performance. It has the
ability to configure the inputs in either single-ended or differential mode. NAU8224 is available in Miniature QFN-20
package.
Key Features
Low Quiescent Current:
• 2.1mA at 3.7V for 2 channels
• 3.2mA at 5V for 2 channels
Gain Setting with 2 wire interface and GS pin
• 24dB to -62dB (plus mute)
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
NAU8224 Datasheet Rev 1.0
Figure 1: NAU8224Block Diagram
Page 1 of 27
Aug, 2012