E-TDA7416 STMicroelectronics, E-TDA7416 Datasheet - Page 16

• Manufacturer Part Number: E-TDA7416
• Description: IC SIGNAL PROCESSOR 44-TQFP
• Manufacturer: STMicroelectronics
• Type: Car Signal Processorr

Specifications of E-TDA7416

• Applications: Radio
• Mounting Type: Surface Mount
• Package / Case: 44-TQFP
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Package Type: TQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

TDA7416
1.9 AC-coupling
In some applications additional signal manipulations are desired. For this purpose an AC-coupling is
placed before the speaker(fader)-attenuators, which can be activated or internally shorted by I
short condition the input-signal of the speaker-attenuator is available at the AC-outputs. The input-imped-
ance of this AC-inputs is 50k . 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 figure 14).
The source of front and rear speaker can be set independently.
As source is choosable :
Figure 15. AC/DC-coupling
1.10 Front Speaker-Attenuator and Mixing
A Mixing-stage is placed after front speaker-attenuator and can be set independently to mixing-mode.
Having a full volume for the Mix-signal the stage offers a wide flexibility to adapt the mixing levels.
Figure 16. Output Selector
1.11 Audioprocessor Testing
During the Testmode, which can be activated by setting bit I
processor testing byte, several internal signals are available at the Mix pin. During this mode the input
resistance of 100kOhm is disconnected from the pin. The internal signals available are shown in the Data-
byte specification.
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From M I Xin
Rear selector
left channel
right channel
Front
Highpass
fr
Lowpass
fr
- internal dc coupling (not recommended)
- external ac coupling using ACin pins
Volume
+15/-79dB
1dB step
Volume
+15/-79dB
1dB step
flat
fla t
ACoutL
SWout
Highpass2
Vref
SWin
Vref
ACinL
2
of the subaddress byte and D
1
Front Fader
Rear Fader
Subwoofe r Fader
0
OutF
of the audio-
2
C-Bus. In