TDA7407 STMicroelectronics, TDA7407 Datasheet - Page 23

• Manufacturer Part Number: TDA7407
• Description: IC PROCESSOR CAR SIGNAL 44TQFP
• Manufacturer: STMicroelectronics
• Type: Car Signal Processorr

Specifications of TDA7407

• Applications: Automotive Audio
• Mounting Type: Surface Mount
• Package / Case: 44-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 497-3979

TDA7407
5.1.8
5.1.9
5.1.10
5.1.11
5.1.12
5.1.13
5.1.14
5.1.15
5.1.16
5.1.17
5.1.18
5.1.19
Attenuation (80Hz)
Figure 9
Center frequency (60, 70, 80, 100Hz)
Figure 10
Quality factors (1, 1.25, 1.5, 2)
Figure 11
DC mode
In this mode the DC gain is increased by 5.1dB. In addition the programmed center
frequency and quality factor is decreased by 25%, which can be used to reach alternative
center frequencies or quality factors. (see
MID
There are 3 parameters programmable in the mid stage (see figures13,
Attenuation (1kHz)
Figure 13
Center frequency (500, 1k, 1.5k, 2k Hz)
Figure 14
Quality factor (2 at 1kHz)
Figure 15
Treble
There are two parameters programmable in the treble stage (see figures 16, and17):
Attenuation (17.5kHz)
Figure 16
17.5KHz.
Center frequency (10, 12.5, 15, 17.5kHz)
Figure 17
AC coupling
In some applications additional signal manipulations are desired, for example surround
sound or more band equalizing. For this purpose AC Coupling is placed before the speaker
attenuators, which can be activated or internally shorted by Bit7 in the Bass/Treble
configuration byte. In short condition the input signal of the speaker attenuator is available at
shows the attenuation as a function of frequency at a center frequency of 80Hz.
shows the four possible center frequencies 60,70,80 and 100Hz.
shows the four possible quality factors 1, 1.25, 1.5 and 2.
shows the attenuation as a function of frequency at a center frequency of 1kHz.
shows the four possible center frequencies 500Hz, 1kHz, 1.5kHz and 2kHz.
shows the two possible quality factors 1 and 2 at a center frequency of 1kHz.
shows the attenuation as a function of frequency at a center frequency of
shows the four possible Center Frequency (10, 12.5, 15 and 17.5kHz).
Figure
12)
14
Multipath detector
and 15)
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