E-TDA7406 STMicroelectronics, E-TDA7406 Datasheet - Page 25

• Manufacturer Part Number: E-TDA7406
• Description: Audio DSPs CAR RADIO SIGNAL
• Manufacturer: STMicroelectronics

Specifications of E-TDA7406

• Operating Temperature Range: - 40 C to + 85 C
• Mounting Style: SMD/SMT
• Package / Case: TQFP-44
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

TDA7406
4.9
Figure 15. Spectrum analyzer block diagram
Figure 16. Timing spectrum analyzer
AC-coupling
In some applications additional signal manipulations are desired. For this purpose an AC-
coupling is placed before the speaker-attenuators, which can be activated or internally
shorted by I²C-Bus. In short condition the input-signal of the speaker-attenuator is available
at the AC-outputs. The input-impedance of this AC-inputs is 50kΩ. In addition there are Mix
inputs available. With this inputs it is possible to mix an external signal to every speaker with
a mixing ratio of 50% (see
The source of front and rear speaker can be set independently. As source is possible to
choose:
If the Mix
the internal subwoofer filter.
–
–
–
–
In
internal dc coupling (not recommended)
external ac coupling using AC
external ac coupling using Mix
mixing of AC
pins of the rear speaker are not used this inputs can be used as mixing inputs for
In
and Mix
Figure
In
17).
pins (mixing ratio: 50%)
In
In
pins
pins
Description of the audioprocessor part
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In