Features

16/18/20/24-bits input with I2

S, Left-alignment,

Right-alignment and TDM data format

PSNR & DR(A-weighting)

Loudspeaker: 107dB (PSNR), 108dB (DR)@24V

 Multiple sampling frequencies (Fs)

8kHz, 16kHz, 32kHz/44.1kHz/48kHz and

64kHz/88.2kHz/96kHz

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

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

BCLK system:

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

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

Supply voltage

3.0~3.6V for DVDD

8~26V for PVDD

Supports 2.0CH/Mono configuration

Loudspeaker output power@12V for stereo

8W x 2CH into 8Ω @ 1% THD+N

15W x 2CH into 4Ω @ 1% THD+N

Loudspeaker output power@24V for stereo

25W x 2CH into 8Ω <1% THD+N

Sound processing including：

32 bands parametric speaker EQ

Volume control (+24dB~-103dB, 0.125dB/step)

Dynamic range control

Three Band plus post Dynamic range control

Power Clipping

Programmed 3D surround sound

Channel mixing

Noise gate with hysteresis window

DC-blocking high-pass filter

Pre-scale/post-scale

Post-Boost (+48dB)

I2S output with user programmed gain

(+24dB~mute)

Anti-pop design

Level meter and power meter

I

2

S output with selectable Audio DSP point

Short circuit and over-temperature protection

Supports I2C control without clock

I

2C control interface with selectable device

address

Support hardware and software reset

Internal PLL

LV Under-voltage shutdown and HV Under-voltage

detection

 Over voltage protection

Applications

TV audio

Boom-box, CD and DVD receiver, docking system

Powered speaker

Wireless audio

Description

AD82120 is a digital audio amplifier capable of

driving 25W (BTL) each to a pair of 8Ω load speaker

and 50W (PBTL) to a 4Ω load speaker operating at

24V supply without external heat-sink or fan

requirement with play music. AD82120 provides

advanced audio processing functions, such as volume

control, 32 EQ bands, audio mixing, 3D surround

sound and Dynamic Range Control (DRC). These are

fully programmable via a simple I

2C control interface.

Robust protection circuits are provided to protect

AD82120 from damage due to accidental erroneous

operating condition. The full digital circuit design of

AD82120 is more tolerant to noise and PVT (Process,

Voltage, and Temperature) variation than the analog

class-AB or class-D audio amplifier counterpart

implemented by analog circuit design. AD82120 is pop

free during instantaneous power on/off or mute/shut

down switching because of its robust built-in anti-pop

circuit.