EUA2811
20-W Stereo Digital Audio Power Amplifier

with EQ, 3-Band AGL and 3D

DESCRIPTION
The EUA2811 is a 20-W, digital audio power amplifier
with 4 half-bridged power drivers. The EUA2811 is a slave
device that all clocks are provided by the external sources.
One serial data input allows processing of up to two
discrete audio channels and seamless integration to most
digital audio processors. A bidirectional I2C interface
allows reading or writing to change the internal register
status.
Advanced EMI Suppression Technology enables the use of
inexpensive ferrite bead filters at the outputs while meeting
EMC requirements for system cost reduction.
The EUA2811 also features short-circuit and thermal
protection preventing the device from being damaged
during a fault condition. The EUA2811 is available in
thermally efficient 48-pin TQFP package.
FEATURES
 Audio Input/Output
- Wide Power Supply Voltage: 8 V to 26 V
- Digital Supply: 3.3V
- 20W/ch into an 8-Ω Load from an 18-V Supply
- 40W into an 4-Ω Mono load from an 18-V supply
- Supports 8 kHz - 192 kHz Sample Rates Serial
Audio Input (LJ/RJ/I2S)
- Bidirectional I2C interface
- Slave Address Select Pin
- Support 3-wire I2S Mode (No MCLK Required)
- Support BTL and PBTL Configuration
 Audio Processing
- DC Blocking Filters
- Channel Volume Control 24 dB to mute
- 20 Biquads for Speaker EQ
- Programmable 3-Band Automatic Gain
Limiting (AGL)
- 3D Effects
 Benefits
- EQ: Speaker Equalization Improves Audio
Performance
- DRC: Enables Speaker Protection and Night-Mode
Listening
- Soft Mute
- Auto detect: Automatically Detects Sample-rate
Changes
- Thermal and short circuit protection
 Available in TQFP-48 (EP) Package
 RoHS compliant and 100% lead(Pb)-free
Halogen-Free
APPLICATIONS
 LCD TV
 Low Cost Audio Equipment
 Sound Bar