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MAX98365 Evaluation Systems
Evaluates: MAX98365A/MAX98365B/
MAX98365C/MAX98365D
Quick Start Guide
Required Equipment
●
MAX98365 EV system
• MAX98365 development board (DEV board)
• Audio Interface Board III (AUDINT3 board)
• Micro-USB cable
●
DC power supply (3V to 14V, 3A)
● 4Ω to 8Ω speaker
●
PC with Windows
®
7 or Windows 10 with available
USB port
●
USB audio source (e.g., Windows Media Player
®
or
iTunes
®
)
Reference Material
●
MAX98365 IC data sheet
Procedure
The MAX98365 and AUDINT3 boards are fully assembled
and tested. Follow the steps below to set up the EV sys-
tem for device evaluation.
Note:
In the following sections, software-related items are
identified by bolding. Text in
bold
refers to items directly
from the evaluation software. Text in
bold and under-
lined
refers to items from the Windows operating system.
AUDINT3 Board Setup:
1) Connect the MAX98365 DEV board (3 row J1 con-
nector) to the AUDINT3 board (3 row J1 connector).
To avoid damage, it is important to make sure the
connectors of the two boards are properly aligned.
The bottom row of both J1 connectors should be
lined up so the standoffs on the corners of the
AUDINT3 and DEV board are level.
2) With the audio source disabled, connect the Micro-
USB cable from your computer to the USB port (J2)
on the AUDINT3 board. The AUDINT3 board pro-
vides the BCLK and LRCLK signals as well as the
power for VDDIO, sourcing 1.8V to the DEV board
through the J1 connector.
3)
The multi-color LED D1 initially flashes blue, and
then should change to slow flashing magenta when
the computer successfully registers the AUDINT3 as
a USB audio playback device.
DEV Board Setup:
1) Connect the AUDINT3 VDD jumper. Place one shunt
on jumper J13 across pins labeled 1.8V and VDD.
This allows the AUDINT3 to provide 1.8V to the VDD
pin on MAX98365.
2)
Configure I
2
S channel jumper. Place triple shunt on
jumper J5, DAI C for mono-mix. Remove any shunts
from J4, J3, and J2.
3) Set the gain jumper. Place one shunt on jumper J7
for desired gain (can use 21dB for PVDD = 14V).
4) Enable the IC jumper. Place the shunt on jumper J6
across pins VDD and EN.
5)
Connect the speaker. Connect the speaker leads
across the FOUTP and FOUTN binding posts.
6) Connect PVDD. With the DC supply not powered,
connect the 3V to 14V power supply across the
PVDD and GND binding posts.
USB Audio Playback Test:
1) Enable the PVDD supply voltage (3V to 14V, 3A).
2) Open the Windows’
Sound
dialog and select the
Playback
tab. A
Speakers
item such as
Figure 2
should be listed as an available playback device.
3) Verify that the
Speakers
item is set as the default
device. Once this is done, the AUDINT3 board out-
puts PCM data to the DIN pin on the DEV board.
4) Adjust the audio source volume to a low level.
5) Enable the audio source and verify that audio is
heard through the connected speaker. Adjust the
audio source volume as needed.
6)
Quick Start for USB Audio Playback is now complete.
7) For details on how to connect in a standalone mode
to audio test equipment, such as Audio Precision,
see the
Detailed Description of Hardware
section.
iTunes is a registered trademark of Apple Inc.
Windows is a registered trademark and registered service mark of Microsoft Corporation.
Windows Media is a registered trademark and registered service mark of Microsoft Corporation.
Figure 2. Playback Device
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