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MAX98365 Evaluation Systems
Evaluates: MAX98365A/MAX98365B/
MAX98365C/MAX98365D
Audio Interface Board III
Maxim’s Audio Interface Board III (AUDINT3) facilitates the
evaluation of the DEV board by providing a set of features
that can be used to exercise the capabilities of the DEV
board without the need for additional audio equipment. The
main components of the AUDINT3 board are its LDO supply
voltages and its USB-to-PCM interface. The supply voltages
allow the DEV board to be evaluated with minimal amount
of external supplies. The USB-to-PCM converter allows any
computer to be used as an audio source for the DEV board’s
digital audio PCM interface.
The MAX98365 DEV board connects to the AUDINT3
board through connector J1. The physical connections made
between the DEV board and AUDINT3 board are listed in
Table 8
.
USB Audio Input
To use the USB streaming feature of the AUDINT3 board,
ensure that the AUDINT3 board is connected to the DEV
board, then connect the USB cable from your computer to
the USB connector J2 on the AUDINT3 board. Configure
the desired audio signal inputs using the Audio Controls
panel of the AUDINT3 interface software (
Figure 5
). As
described earlier, a computer can be used to supply
audio inputs over USB interface in several selectable
formats, found under the DAI mode drop-down menu.
The AUDINT3 board can also generate test signal tones
of various type, frequency, and amplitude as shown in
Figure 6
.
Table 8. AUDINT3 Connector (J1)
SIGNAL
PIN
SIGNAL
PIN
SIGNAL
PIN
—
1
MCLK
2
GND
3
BCLK2
4
BCLK1
5
GPIO1
6
LRCLK2
7
LRCLK1
8
GPIO2
9
DAC2
10
DAC1
11
GPIO3
12
ADC2
13
ADC1
14
GPIO4
15
—
16
ID
17
3.3V
18
AVDD
19
DVDD
20
GND
21
HPVD
22
VDDIO
23
GND
24
GND
25
SDA
26
5V
27
—
28
SCL
29
5V
30
GND
31
IRQ
32
RST
33
—
34
—
35
—
36
GND
37
—
38
—
39
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