描述 Description

This is a stereo/mono fully digital audio amplifier with output power which can drive 8Ω/4Ω load with up to 24 V voltage supply. Using I2C digital control interface, AD8258A provides sound processing includes Volume, Bass, Treble, EQ, Mixing and Dynamic Range Control (DRC). Protection circuits are provided to protect AD8258A damage while connection error. It is possible to compose of 2.1 channels with two pieces of AD8258A and 5.1 channels with four pieces.

特性 Features

● 16/18/20/24-bit input with I2S, Left-alignment

and Right-alignment data format

● PSNR & DR(A-weighting)

Loudspeaker: 92dB (PSNR), 89dB (DR) @24V

Headphone: 86dB (PSNR), 86dB (DR)

● Multiple sampling frequencies (Fs)

32kHz / 44.1kHz / 48kHz and

64kHz / 88.2kHz / 96kHz

128kHz/176.4kHz/192kHz

● System clock = 64x, 128x, 192x, 256x, 384x,

512x, 576x, 768x, 1024x Fs

64x~1024x Fs for 32kHz / 44.1kHz / 48kHz

64x~512x Fs for 64kHz / 88.2kHz / 96kHz

64x~256x Fs for 128kHz/176.4kHz/192kHz

● Supply voltage

12V~24V for loudspeaker driver

3.0~3.3V for others

● Loudspeaker output power for 24V

2×28W into 8?@1 THD+N for stereo

2×35W into 8?@10 THD+N for stereo

1x55W into 4?@1 THD+N for mono

1x70W into 4?@10 THD+N for mono

● Headphone power

40mW into 32?@1kHz and 1 THD+N

80mW into 16?@1kHz and 1 THD+N

● Sound processing including：

Bass (+18dB~-12dB, 3dB frequency is 250Hz),

Treble (+18dB~-12dB, 3dB frequency is 7kHz),

5 bands parametric EQ,

Volume control (+24dB~-103dB, 1dB/step) and

Dynamic range control

● Anti-pop design

● Over-temperature protection

● Under-voltage shutdown

● Short-circuit protection

● I2C control interface

● Subwoofer line-out support

Applications

● CD and DVD

● TV audio

● Car audio

● Boom-box

● MP3 docking systems

● Portable / Handheld

● Powered speaker

● Wireless audio

● USB speaker