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6.8
Frequency Response
-120
0
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
Amplitude-dB
20
20k
50
100
200
500
1k
2k
5k
10k
f - Frequency - Hz
0 dB
Left
Right
to
Right to Left
-20
2
-18
-16
-14
-12
-10
-8
-6
-4
-2
-0
20
80k
50
100
200
500
1k
2k
5k
10k
20k
50k
f - Frequency - Hz
Amplitude-dB
600
load
W
DRV601EVM Performance
Measurement bandwidth filter is set to 500 kHz.
Figure 17. Channel Separation, 10x Lower Feedback Impedance
With a 10x lower impedance in the feedback network, the channel separation improved significantly and is
now >100 dB at 1 kHz. The lower impedance network also improved the noise floor, and now the dynamic
range is >110-dB , equal to <6-
µ
Vrms noise.
The parts used are: R11=R12=1k5, R16=R17=3k0, R14=R15=4k7, C17=C18=3n3, C19=C20=330 pF,
C15=C16=10
µ
F ac-coupling.
Measurement bandwidth filter is set to 500 kHz.
Figure 18. Frequency Response
SLOU215 – January 2008
DRV601EVM
15
