Texas Instruments DRV601EVM - DRV601 Evaluation Module DRV601EVM DRV601EVM データシート
製品コード
DRV601EVM
www.ti.com
6.5
FFT Spectrum With –60 dBFS Tone
0
22k
2k
4k
6k
8k
10k
12k
14k
16k
18k
20k
f - Frequency - Hz
-150
0
-140
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
Amplitude-dB
6.6
Idle Noise FFT Spectrum
0
90k
10k
20k
30k
40k
50k
60k
70k
80k
f - Frequency - Hz
-150
0
-140
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
Amplitude-dB
DRV601EVM Performance
Reference voltage is 2 Vrms. FFT size 16k.
Figure 14. FFT Spectrum With –60-dBFS Tone
This spectrum corresponds to a dynamic range of 104-dB A-weighted. SNR measures to 104 dB
A-weighted, <12
A-weighted, <12
µ
Vrms. This noise floor is dominated by the feedback resistor network impedance level.
This can be improved by lowering the impedance level, a 10x lower impedance level lowers the noise floor
to 110 dB, <6
to 110 dB, <6
µ
Vrms.
Reference voltage is 2 Vrms. FFT size 16k.
Figure 15. Idle Noise FFT Spectrum (BTL)
SLOU215 – January 2008
DRV601EVM
13