TDA7417 STMicroelectronics, TDA7417 Datasheet - Page 13

• Manufacturer Part Number: TDA7417
• Description: IC PROCESSOR CAR SIGNAL 32-TQFP
• Manufacturer: STMicroelectronics
• Type: Audio Processorr

Specifications of TDA7417

• Applications: Radio
• Mounting Type: Surface Mount
• Package / Case: 32-TQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

TDA7417
4
4.1
4.2
Description of the audioprocessor
Input stages
In the basic configuration, one stereo quasi-differential, one selectable full-differential and
two single ended stereo inputs are available. As
Quasi-differential stereo Input (QD)
The QD input is implemented as a buffered quasi-differential stereo stage with 100kΩ input-
impedance at each input. The attenuation is fixed to -3.5dB in order to adapt the incoming
signal level.
Single-ended stereo input (SE1, SE2)
The input-impedance at each input is 100kΩ and the attenuation is fixed to -3.5dB for
incoming signals.
Full differential stereo Input (FD)
The FD input is implemented as a selectable full-differential stereo stage with 50k input-
impedance at each input or high impedance status. The attenuation is fixed to -3.5dB in
order to adapt the incoming signal level.The high impedance status is 100kΩ
Figure 3.
AutoZero
The AutoZero allows a reduction of the number of pins as well as external components by
canceling any offset generated by or before the In-Gain-stage (Please notice that externally
generated offsets, e.g. generated through the leakage current of the coupling capacitors,
are not canceled).
The auto-zeroing is started every time the input source is changed and needs max. 0.32ms
for the alignment. To avoid audible clicks the Audio processor is muted before the loudness
stage during this time.
Quasi-differential
Full-differential
Input stage
SEL1/SER1
SEL2/SER2
Mute
Figure 3
Description of the audioprocessor
shown.
InGain
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