Texas Instruments DRV602EVM2, Руководство пользователя, Страница: 9 / 18

6.2 THD+N vs Frequency
10
1
0.1
0.01
0.001
0.0001
THD+N(%)
20 100 500 1 k 5 k 10 k 20 k
Frequency (Hz)
2 V
RMS
0.2 V
RMS
Load: 2.5 k W
6.3 FFT Spectrum with –60dBFS Tone
0
20
40
60
80
100
120
140
160
-
-
-
-
-
-
-
-
dB(dB)
0 5 10 15 20 25
Frequency (kHz)
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DRV602EVM2 Performance
Figure 6 illustrates characteristic performance for THD+N versus frequency.
Figure 6. THD+N versus Frequency
For the FFT plot shown in Figure 7 , the reference voltage is 2 V
RMS
and the FFT size is 16 k.
Figure 7. FFT Spectrum with –60-dBFS Tone
SLOU248A – December 2008 – Revised January 2009 DRV602EVM2 9
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