參數(shù)資料
型號(hào)： TA2170FLG
元件分類： 音頻／視頻放大
英文描述： 0.02 W, 2 CHANNEL, AUDIO AMPLIFIER, PQCC24
封裝： 5 X 5 MM, 0.50 MM PITCH, PLASTIC, QON-24
文件頁(yè)數(shù)： 9/13頁(yè)
文件大小： 231K
代理商： TA2170FLG
TA2170FLG
2006-04-19
5
Application Notes
1.
Mute switch and voltage gain
This IC is designed to ensure there is no perceptible change in volume whether a single output or several
outputs are used.
When the input signal to the three buffer amplifiers is the same and in a linear domain, the relation
between the mute switches and voltage gain is as follows:
Test condition: VCC = 3 V, f = 1 kHz, Vin = 20 dBV, 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
ON
0
0
OFF
ON
6
6
OFF
ON
OFF
6
6
OFF
9.5
9.5
OFF
ON
0
0
OFF
ON
OFF
ON
6
6
OFF
ON
OFF
6
6
OFF
ON
OFF
9.5
9.5
Input signal is applied to BUF 2
ON
ON/OFF
OFF
ON
0
0
ON
ON/OFF
OFF
6
6
OFF
ON
6
6
OFF
ON
OFF
ON
0
6
0
6
OFF
9.5
9.5
OFF
ON
OFF
6
9.5
6
9.5
Input signal is applied to BUF 3.
ON
ON/OFF
ON
OFF
0
ON
ON/OFF
OFF
6
OFF
ON
OFF
6
OFF
ON
OFF
0
6
0
6
OFF
9.5
OFF
ON
OFF
6
9.5
6
9.5
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