TDA7405 STMicroelectronics, TDA7405 Datasheet - Page 13

• Manufacturer Part Number: TDA7405
• Description: IC PROCESSOR EQUALIZER 44-TQFP
• Manufacturer: STMicroelectronics
• Type: Car Signal Processorr

Specifications of TDA7405

• Mounting Type: Surface Mount
• Package / Case: 44-TQFP, 44-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Applications: -

5.4.3 Loudness Order
Different shapes of 1st and 2nd-Order Loudness
Figure 8. 1st and 2nd Order Loudness @ Attn. = 15dB, fP=400Hz
5.4.4 Flat Mode
In flat mode the loudness stage works as a 0dB to -19dB attenuator.
5.5 SoftMute
The digitally controlled SoftMute stage allows muting/demuting the signal with a I2C-bus programmable slope.
The mute process can either be activated by the SoftMute pin or by the I2C-bus. This slope is realized in a spe-
cial S-shaped curve to mute slow in the critical regions (see Figure 9). For timing purposes the Bit of the I2C-
bus output register is set to 1 from the start of muting until the end of de-muting.
Figure 9. Softmute-Timing
Note: Please notice that a started Mute-action is always terminated and could not be interrupted by a change of the mute -signal.
dB
-10.0
-15.0
-20.0
-5.0
0.0
10.0
100.0
Hz
1.0K
10.0K
TDA7405
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