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TDA7342 データシート(PDF) 9 Page - STMicroelectronics

部品番号 TDA7342
部品情報  DIGITALLY CONTROLLED AUDIO PROCESSOR
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メーカー  STMICROELECTRONICS [STMicroelectronics]
ホームページ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TDA7342 データシート(HTML) 9 Page - STMicroelectronics

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DATA BYTE SPECIFICATION
X = not relevant; set to ”1” during testing
MSB
LSB
FUNCTION
D7
D6
D5
D4
D3
D2
D1
D0
0
1
0
0
0
IN 3 (differential input)
0
1
001
IN 2
0
1
010
IN 1
0
1
0
1
1
AM mono
0
1
1
0
0
not used
0
1
1
0
1
not used
0
1
1
1
0
not allowed
0
1
1
1
1
not allowed
0
1
0
0
11.25dB gain
0
1
0
1
7.5dB gain
0
1
1
0
3.75dB gain
0
1
1
1
0dB gain
0
0dB differential input gain ( IN3 )
1
-6dB differential input gain ( IN3 )
For example to select the IN 2 input with a gain of 7.5dB the Data Byte is: X X 1010 0 1
Input Selector
MSB
LSB
FUNCTION
D7
D6
D5
D4
D3
D2
D1
D0
X
X
X
000
00
0dB
X
X
X
0
0
0
0
1
-1.25dB
X
X
X
0
0
0
1
0
-2.5dB
X
X
X
0
0
0
1
1
-3.75dB
X
X
X
0
0
1
0
0
-5dB
X
X
X
0
0
1
0
1
-6.25dB
X
X
X
0
0
1
1
0
-7.5dB
X
X
X
0
0
1
1
1
-8.75dB
X
X
X
0
1
0
0
0
-10dB
X
X
X
0
1
0
0
1
-11.25dB
X
X
X
0
1
0
1
0
-12.5dB
X
X
X
0
1
0
1
1
-13.75dB
X
X
X
0
1
1
0
0
-15dB
X
X
X
0
1
1
0
1
-16.25dB
X
X
X
0
1
1
1
0
-17.5dB
X
X
X
0
1
1
1
1
-18.75dB
X
X
X
1
D3
D2
D1
D0
Loudness OFF (1)
For example to select -17.5dB attenuation, loudness OFF, the Data Byte is: X X X1 1 1 1 0
NOTE 1:
If the loudness is switched OFF, the loudness stage is acting like a volume attenuator with flat fre quency response. D0 to D3 determine the
attenuation level.
Loudness
TDA7342
9/14


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