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Quick start guide for MERUS™ evaluation boards
EVAL_AUDIO_MA12070_B and EVAL_AUDIO_MA12070P_B
Board overview
1
Board overview
The EVAL_AUDIO_MA12070x_B is an evaluation and demonstration board for MERUS™ audio MA12070 and
MA12070P amplifiers.
This evaluation board contains a variety of digital/analog input, output and setup/selection features. It also
contains two onboard power supply generators (5 V and 3.3 V buck-converted) so only one external power
supply (PVDD) is necessary.
This board can be used for evaluating or demonstrating key features/advantages of the MERUS™ technology:
Energy efficiency
•
Power losses at normal user operating conditions (listening levels)
−
Idle power loss
−
Adaptive power management system
•
No output filter components
•
Solution cost and size reduction
−
Audio performance total harmonic distortion (THD) performance and audio quality
•
1.1
Board features and audio performance
Number of audio channels
•
Audio input format
•
MA12070
−
MA12070P
−
Amplifier gain
•
Supply voltage
•
Max. PVDD for MA12070/MA12070P
−
Output noise level
•
MA12070
−
MA12070P
−
Dynamic range
•
MA12070
−
MA12070P
−
Idle consumption at PVDD = 18 V
•
MA12070
−
MA12070P
−
Cross-talk
•
Efficiency, full-scale, 8 Ω
•
Idle consumption is the sum of output stage current and 5 V and 3.3 V supply current. As all the supplies are tied to
1
PVDD, the efficiency of the buck-converted 5 V and 3.3 V should be considered when measuring idle current
consumption directly from PVDD. Features on the EVK make it possible to break the 5 V and 3.3 V supply lines after
the buck converters (see Table 1). Please refer to the MA12070/P device datasheet for exact current figures.
User manual
2 x BTL, 1 x BTL + 2 x SE, 4 x SE
Analog
Digital (I
2
S)
20 dB/Configurable 26 dB
PVDD
26 V
Less than 100 µVrms (AW)
Less than 150 µVrms (AW)
More than 100 dB
More than 95 dB
Less than 16 mA
1
Less than 19 mA
1
Less than -85 dB
91 percent
5
V 1.0
2023-06-07
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