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MAX98365 Evaluation Systems
Evaluates: MAX98365A/MAX98365B/
MAX98365C/MAX98365D
DAI Header
The DAI header J2 provides access to MAX98365’s PCM
bus (BCLK, LRCLK, and DIN). This DAI header facilitates
evaluation with audio equipment I/O. See
Table 7
for
the pinout of the DAI header.
Figure 4
shows a close-up
image of the MAX98365 DAI interface header (J2) to be
used if connecting external DAI inputs, such as those pro-
vided by Audio Precision or other audio test equipment.
Speaker Output
The MAX98365 audio output is routed to the FOUTP and
FOUTN connections on the DEV board. The DEV board
is, by default, assembled to allow the MAX98365 output
to connect directly to a speaker load without the need for
filtering.
EMI Filter
When long speaker cables are used with the MAX98365
output (exceeding ≈12in (30 cm)), a ferrite bead plus
capacitor filter can be installed to prevent excessive EMI
radiation. Although it is best to choose filter components
based on EMI test results, the combination of 100pF
capacitors (C8, C9) and ferrite beads (L1, L2) generally
work well. Before adding the filters to the design, first
remove the small PCB traces shorting the pads of L1 and
L2 (see the
MAX98365 DEV Board PCB Schematic
and
the
MAX98365 DEV Board PCB Layout
diagrams).
Table 6. TDM Mode Channel Selection
Table 7. DAI Header (J2)
Figure 4. MAX98365 DAI Interface Headers (PCM)
TDM
CHANNEL
J4 SHUNT
POSITION
DAI CONFIGURATION
0
1-5
A
1
1-3
A
2
Open
A
3
1-3
B
4
1-5
B
5
1-5
C
6
Open
C
7
1-3
C
SIGNAL
PIN
PIN
SIGNAL
GND
1
2
BCLK
GND
3
4
LRCLK
GND
5
6
DIN
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