TDA7411 ST Microelectronics, TDA7411 Datasheet - Page 15

• Manufacturer Part Number: TDA7411
• Description: ADVANCED CAR SIGNAL PROCESSOR
• Manufacturer: ST Microelectronics

Center Frequency
Figure 12 shows the four possible center frequencies 10k, 12.5k, 15k and 17.5kHz.
Figure 12. Treble Center Frequencies @ Gain = 14dB
Speaker Coupling
In some applications additional signal manipulations are desired, for example surround-sound or more-
band-equalizing. For this purpose an AC-Coupling with four different AC-Coupling inputs is placed before
the speaker-attenuators.
The input-impedance of the AC-Inputs is always 50k
grammable input impedance. For ACin3 exists an internal mixing stage and an internal mono low pass
filter, which is available as input only for the speaker FreeL/R.
There are two possibilities for internal DC Coupling:
The I
– main channel after the bass filter
– main channel after the middle filter (same as at ACout pin)
2
C bus programming tables shows the possible speaker sources.
15. 0
12. 5
10. 0
7. 5
5. 0
2. 5
0. 0
10. 0
100. 0
with exception of AC input ACin1, which has pro-
1. 0K
10. 0K
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