TDA7405 STMicroelectronics, TDA7405 Datasheet - Page 14

• 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: -

TDA7405
5.6 SoftStep-Volume
When the volume-level is changed audible clicks could appear at the output. The root cause of those clicks
could either be a DC-Offset before the volume-stage or the sudden change of the envelope of the audiosignal.
With the SoftStep-feature both kinds of clicks could be reduced to a minimum and are no more audible. The
blend-time from one step to the next is programmable in four steps.
Figure 10. SoftStep-Timing
Note: For steps more than 0.5dB the SoftStep mode should be deactivated because it could generate a hard 1dB step during the blend-time
5.7 Bass
There are four parameters programmable in the bass stage:
5.7.1 Attenuation
Figure 11 shows the attenuation as a function of frequency at a center frequency of 80Hz.
Figure 11. Bass Control @ fC = 80Hz, Q = 1
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dB
-10.0
-15.0
15.0
10.0
-5.0
5.0
0.0
10.0
-0.5dB
0.5dB
-1dB
1dB
100.0
SS Time
Hz
1.0K
10.0K