Class-D Audio Power Amplifier
ADAU1592
FEATURES
GENERAL DESCRIPTION
Integrated stereo modulator and power stage
0.005% THD + N
101 dB dynamic range
PSRR > 65 dB
The ADAU1592 is a 2-channel, bridge-tied load (BTL)
switching audio power amplifier with an integrated Σ-Δ
modulator.
The modulator accepts an analog input signal and generates
a switching output to drive speakers directly. A digital,
microcontroller-compatible interface provides control of reset,
mute and PGA gain as well as output signals for thermal and
overcurrent error conditions. The output stage can operate
from supply voltages ranging from 9 V to 18 V. The analog
modulator and digital logic operate from a 3.3 V supply.
R
DS-ON < 0.3 Ω (per transistor)
Efficiency > 90% (8 Ω)
EMI-optimized modulator
On/off-mute pop-noise suppression
Short-circuit protection
Overtemperature protection
APPLICATIONS
Flat panel televisions
PC audio systems
Mini-components
FUNCTIONAL BLOCK DIAGRAM
PGA0
PGA1
PVDD
PGA
AINL
A1
A2
OUTL+
PGND
PVDD
B1
B2
OUTL–
SLC_TH
SLICER
PGND
PVDD
LEVEL SHIFT
AND DEAD
TIME CONTROL
Σ-Δ
MODULATOR
C1
C2
OUTR+
PGND
PVDD
AINR
PGA
D1
D2
PGA0
PGA1
OUTR–
PGND
AVDD
fCLK/2
VREF
VOLTAGE
REFERENCE
TEMPERATURE/
OVERCURRENT
PROTECTION
AGND
CLOCK
OSCILLATOR
MODE CONTROL
LOGIC
DVDD
DGND
ADAU1592
XTI XTO MO/ST STDN MUTE ERR OTW
Figure 1.
Rev. 0
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responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
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