ADAU1592ACPZ-RL Analog Devices Inc, ADAU1592ACPZ-RL Datasheet - Page 20

• Manufacturer Part Number: ADAU1592ACPZ-RL
• Description: 18W Int Stereo Switching Audio Power Amp
• Manufacturer: Analog Devices Inc
• Type: Class Dr

Specifications of ADAU1592ACPZ-RL

• Output Type: 2-Channel (Stereo)
• Max Output Power X Channels @ Load: 24W x 2 @ 4 Ohm
• Voltage - Supply: 9 V ~ 18 V
• Features: Depop, Mute, Short-Circuit and Thermal Protection, Standby
• Mounting Type: Surface Mount
• Package / Case: 48-LFCSP
• Operational Class: Class-D
• Audio Amplifier Output Configuration: 2-Channel Stereo
• Output Power (typ): 24x2@4OhmW
• Audio Amplifier Function: Speaker
• Total Harmonic Distortion: 0.005@6Ohm@1W%
• Single Supply Voltage (typ): Not RequiredV
• Dual Supply Voltage (typ): 3.3/15V
• Power Supply Requirement: Triple
• Rail/rail I/o Type: No
• Power Supply Rejection Ratio: 65dB
• Single Supply Voltage (min): Not RequiredV
• Single Supply Voltage (max): Not RequiredV
• Dual Supply Voltage (min): 3/9V
• Dual Supply Voltage (max): 3.6/18V
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 48
• Package Type: LFCSP EP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ADAU1592
capacitors must be placed very close to their respective pins
with direct connection. This is important for reliable and safe
operation of the device. One additional 1 μF capacitor in parallel
to the 100 nF capacitor is also recommended. A bulk bypass
capacitor of 470 μF is also recommended to remove the low
frequency ripple due to load current.
Similarly, one 100 nF capacitor is recommended between each
DVDD/DGND and AVDD/AGND. These capacitors also must
be placed close to their respective pins with direct connection.
EXTERNAL PROTECTION FOR PVDD > 15 V
As the PVDD supply voltage approaches 15 V and above,
the available headroom with maximum PVDD is reduced.
As with any switching amplifier, the outputs swing to full rail
and the amount of overshoot due to parasitic elements of the
package/board is significant. Therefore, for reliable and safe
operation, it is recommended that external protection circuits
be added for applications that require supply voltages >15 V.
The use of an RC snubber or a Schottky diode on the outputs
should be considered.
The RC snubber should be connected between the OUTx+ pin
and the OUTx− pin for each channel. The typical recommended
values are 10 Ω and 680 pF. Also, both components must be
placed close to the output pins. For two channels, two resistors
and two capacitors are needed.
If Schottky diodes are preferred, the diodes must be from each
OUTx−/OUTx+ pin to PVDD/PGND. Therefore, a total of
eight diodes is required for two channels. The Schottky diodes
must be placed close to the output pins to be effective.
Rev. A | Page 20 of 24
CLOCK
The ADAU1592 uses 24.576 MHz for the master clock, which is
512 × f
the clock.
Option 1: Using a Quartz Crystal
A quartz crystal of 24.576 MHz frequency can be connected
between the XTI and XTO pins using two load capacitors
suitable for the crystal oscillation mode.
Option 2: Using a Ceramic Resonator
The ADAU1592 can also be used with ceramic resonators
similar to crystal by using the XTI and XTO pins.
Option 3: Using an External Clock
The ADAU1592 can be provided with an external clock of
24.576 MHz at the XTI pin. The logic level for the clock input
should be in the range of 3.3 V and 50% typical duty cycle.
For systems using multiple ADAU1592s, it is recommended to
use only one clock source if the ADAU1592s share the same
power supply to prevent the beat frequencies of asynchronous
clocks from appearing in the audio band.
Multiple ADAU1592s can be connected in a daisy chain by
providing or generating a master clock from one ADAU1592
and subsequently connecting its XTO output to the XTI input
of the next ADAU1592, and so on. However, using a simple logic
buffer from the XTO pin of one ADAU1592 to the XTI pin of the
next ADAU1592 is recommended. Because the clock output is
now buffered, it can be connected to the XTI inputs of the
remaining ADAU1592s, depending on the fanout capability of
the logic buffer used.
S
(f
S
= 48 kHz). There are several options for providing