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TDA7406 데이터시트(PDF) 17 Page - STMicroelectronics

부품명 TDA7406
상세설명  Car radio signal processor
PDF  64 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
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TDA7406 데이터시트(HTML) 17 Page - STMicroelectronics

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TDA7406
Description of the audioprocessor part
17/64
Figure 3.
Input-stages
4.2
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 DATA-BYTE 0 is selected and needs max. 0.3ms
for the alignment. To avoid audible clicks the Audioprocessor have to be muted by soft mute
or hard mute during this time.
4.2.1
AutoZero for Stereodecoder-Selection
A special procedure is recommended for selecting the stereodecoder at the input-selector to
guarantee an optimum offset-cancellation:
(Step 0: SoftMute or Mute the signal-path)
Step 1: Temporary deselect the stereodecoder at the input-selector
Step 2: Configure the stereodecoder via IIC-Bus
Step 3: Wait 1ms
Step 4: Select the stereodecoder



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