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TA2170FTG Folha de dados(PDF) 5 Page - Toshiba Semiconductor

Nome de Peças TA2170FTG
Descrição Electrónicos  Low Current Consumption Headphone Amplifier (Built-in input selector)
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Fabricante Electrônico  TOSHIBA [Toshiba Semiconductor]
Página de início  http://www.semicon.toshiba.co.jp/eng
Logo TOSHIBA - Toshiba Semiconductor

TA2170FTG Folha de dados(HTML) 5 Page - Toshiba Semiconductor

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TA2170FTG
2006-04-19
5
Application Notes
1.
Mute switch and voltage gain
This IC is designed so that a volume feeling may not change with a single output and many outputs.
When the input signal to buffer amplifier is same and a linear domain, the relation between mute switches
and voltage gain are as follows.
Test condition: VCC = 3 V, f = 1 kHz, Vin = −20dBV, theoretical value
(1)
1 input mode
Attenuation to an input signal (dB)
MUTE SW
BUF1
BUF2
BUF3
Total gain
(dB)
MUTE1
MUTE1A
MUTE2
MUTE3
Ach
Bch
Ach
Bch
Ach
Bch
Ach
Bch
Input signal is applied to BUF 1.
OFF
OFF
ON
ON
0
0
0
0
OFF
OFF
OFF
ON
−6
−6
−6
−6
OFF
OFF
ON
OFF
−6
−6
−6
−6
OFF
OFF
OFF
OFF
−9.5
−9.5
−9.5
−9.5
OFF
ON
ON
ON
0
0
OFF
ON
OFF
ON
−6
−6
OFF
ON
ON
OFF
−6
−6
OFF
ON
OFF
OFF
−9.5
−9.5
Input signal is applied to BUF 2
ON
ON/OFF
OFF
ON
0
0
0
0
ON
ON/OFF
OFF
OFF
−6
−6
−6
−6
OFF
OFF
OFF
ON
−6
−6
−6
−6
OFF
ON
OFF
ON
0
−6
0
−6
OFF
OFF
OFF
OFF
−9.5
−9.5
−9.5
−9.5
OFF
ON
OFF
OFF
−6
−9.5
−6
−9.5
Input signal is applied to BUF 3.
ON
ON/OFF
ON
OFF
0
0
0
0
ON
ON/OFF
OFF
OFF
−6
−6
−6
−6
OFF
OFF
ON
OFF
−6
−6
−6
−6
OFF
ON
ON
OFF
0
−6
0
−6
OFF
OFF
OFF
OFF
−9.5
−9.5
−9.5
−9.5
OFF
ON
OFF
OFF
−6
−9.5
−6
−9.5


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