參數(shù)資料
型號： TA2170FTG
廠商： Toshiba Corporation
英文描述： Low Current Consumption Headphone Amplifier (Built-in input selector)
中文描述： 低電流消耗耳機放大器（內(nèi)置輸入選擇器）
文件頁數(shù)： 5/12頁
文件大小： 233K
代理商： TA2170FTG
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: V
CC
=
3 V, f
=
1 kHz, V
in
=
20dBV, theoretical value
(1)
1 input mode
Attenuation to an input signal (dB)
BUF1
BUF2
Ach
Bch
Ach
MUTE SW
BUF3
Total gain
(dB)
Ach
MUTE1
MUTE1A
MUTE2
MUTE3
Bch
Ach
Bch
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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