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User manual for MA evaluation boards
MA2304DNS/MA2304PNS
Overview
1
Overview
The demonstration board EVAL_AUDIO_MA2304xNS is an evaluation and demonstration board for MERUS™
audio's MA2304DNS and MA2304PNS amplifiers.
It contains digital input/output (I/O) and a variety of output and setup/selection features. It also contains one
onboard buck power supply generator (1.8 V/3.3 V selectable) so only one external power supply (PVDD) is
necessary.
The board can be used for evaluating or demonstrating key features/advantages of the MERUS™ technology:
Energy efficiency
•
− Power losses at typical audio listening levels
− Idle power loss
Adaptive power management system
•
No output filter components
•
− Solution cost and size reduction
Audio performance
•
− THD performance and audio quality
1.1
Board features and audio performance
Number of audio channels
•
Audio input format
•
Typical supply voltage
•
Output noise level
•
Dynamic range
•
Idle consumption at PVDD = 18 V
•
Efficiency
•
− 1 W, 8 Ω
− Full-scale, 8 Ω
Note:
Idle consumption is the sum of output stage (PVDD) current, VDD, and VDD_IO supply current. As all
the supplies are tied to PVDD, the efficiency of the buck-converter should be taken into account
when measuring idle current consumption directly from PVDD. Features on the EVK make it
possible to break the input and output of the buck converters for these purposes (see
Please refer to the MA2304xNS device datasheet for exact current figures.
1.2
EVK device type
The type of device – MA2304DNS/MA2304PNS – is printed on the top of the EVK, and is also stated on the serial
number label on the bottom side of the EVK PCB.
User Manual
2 (BTL) or 1 (PBTL)
Digital (I
S, LJF, RJF or TDM)
2
18 V (PVDD)
52 µV
(high audio performance mode)
RMS
106 dB (high audio performance mode)
61 mW (low power consumption mode)
More than 79 percent
More than 90 percent
3
Table
3).
V 1.0
2022-08-26
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