TDA7416 Datasheet, PDF (14/27 Pages) STMicroelectronics – CARRADIO SIGNAL PROCESSOR

TDA7416
1.6.5 DC-mode of equalizer band 1 (62/100 Hz)
In this mode, the DC-gain 4dB when set to 15dB boost.
Figure 11. EQ band1, normal- and DC-mode @ boost = 15 dB, f_Center = 62 Hz
16
dB
14
12
10
8
6
4
2
0
-1
1
10
100
1K
Note: The center frequency, Q, DC-mode and boost/cut can be set fully independently for each filter.
Hz 10K
1.7 Subwoofer Application
Figure 12. Subwoofer Application with Lowpass @ 80/120/160Hz and HighPass @ 90/135/180Hz
0.0
-10.0
-20.0
dB
-30.0
-40.0
-50.0
10.0
100.0
1.0K
Hz
10.0K
Both filters, the lowpass- as well as the highpass-filter, have butterworth characteristic so that their cut-off
frequen-cies are not equal but shifted by the factor 1.125 to get a flat frequency response.
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