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.