Measurement Results; Frequency Sweep - Infineon MERUS MA120 Series User Manual

User manual for MA120xxx reference boards

Measurement results

3 Measurement results
This section shows the measurement results from tests performed on a reference board, which demonstrate
high audio and efficiency performance and good thermal characteristics.
Measurements include:


Frequency sweep

 Output power sweep

Output spectrum
 Power consumption and efficiency
 EMI
All measurement results were obtained using the following settings:

Device: MA12070
 Two-channel BTL configuration
 Load: 4 Ω + 22 μH series inductance

PVDD: 18 V
 Gain setting: 20 dB

PMP: default PMP0
 Measurements carried out with APx 515 + AUX-0025 input filter
 APx uses AES17 brick-wall filter (20 kHz)
3.1 Frequency sweep
Frequency sweeps were carried out with both channels at 1 W output power. To improve the gain drop at 20 Hz,
use larger input capacitors.
40
35
30
25
20
15
10
5
0
10
Figure 7 Gain vs. frequency
Application Note
Channel 1
Channel 2
100
Frequency [Hz]
13 of 28
1000 10000
V 1.0
2019-04-28