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User manual for MERUS™ evaluation boards
EVAL_AUDIO_MA12070_B and EVAL_AUDIO_MA12070P_B
Overview
1
Overview
This is an evaluation and demonstration board for MERUS™ audio MA12070 and MA12070P amplifiers.
It 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.
The 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
−
Crosstalk
•
Efficiency, full-scale, 8 Ω
•
Note:
Idle consumption is the sum of output stage current and 5 V supply and 3.3 V supply current. As all
the supplies are tied to 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
S)
2
20 dB/Configurable 26 dB
PVDD
26 V
Less than 100 µV
(AW)
rms
Less than 150 µV
(AW)
rms
More than 100 dB
More than 95 dB
Less than 16 mA*
Less than 19 mA*
Less than -85 dB
91 percent
3 of 23
V 1.0
2023-03-02
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