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User manual for MERUS™ evaluation boards
EVAL_AUDIO_MA12070_B and EVAL_AUDIO_MA12070P_B
Operating the demonstration board
3
Operating the demonstration board
3.1
Recommended operating conditions
Table 4
Recommended operating conditions
PVDD (MA12070/MA12070P)
Output peak current (MA12070/MA12070P)
3.2
Toggle switches
The board has two toggle switches. The toggle switches have the following functions:
Table 5
Switch function
Switch 1
Switch 2
3.3
Speaker load
The demonstration board is configured as a filterless amplifier. This means that no LC filter is placed between
the amplifier outputs and the load. In normal use the amplifier relies on the inherent inductance of the
loudspeaker and therefore no extra inductance is needed.
Inductors for use in series with power resistors are included with the demonstration board. These can be used
when making any measurements without a real loudspeaker as the load, and having no external low-pass filter
(LPF) in front of the audio analyzer input section.
Please note that many audio measurement analyzers do not perform correctly when connected directly to a
filterless amplifier output.
3.4
GUI
The demonstration board is used with graphical user interface (GUI) PC software to control the MA12070/P
device. The GUI software is included with the demonstration board and runs on Windows PCs.
Unzip the file package on your PC in your preferred location. See the next section for the correct start-up
sequence including starting the GUI.
User Manual
Minimum
Nominal
5.5
Function
Shutdown/Enable (default set to "shutdown")
Mute/Play (default set to "mute")
9 of 23
Maximum
Unit
26
V
8.0
A
2023-03-02
V 1.0
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