参数资料
型号: TDA7404D
厂商: STMICROELECTRONICS
元件分类: 音频控制
英文描述: 1 CHANNEL(S), TONE CONTROL CIRCUIT, PDSO28
封装: SOP-28
文件页数: 14/35页
文件大小: 633K
代理商: TDA7404D
TDA7404
Description of functionality
4.9
External AC - coupling
TDA7404 has external AC coupling terminals which can be selected one of two positions
behind the mixing stage or bass filter.
Figure 16.
External AC coupling
The external AC coupling is selected in position of four switches controlled by the lower 2bit
in the Others selection (seeTable 6).
4.10
Speaker attenuator
Due to practical aspects the steps in the speaker-attenuator are not linear over the full
range. At attenuations more than 24 dB the steps increase from 1.5 dB to 10 dB (please see
data byte specification).
4.11
Subwoofer attenuator
The Subwoofer output is a single ended stereo output. The attenuator is exactly the same
like the other speakers.
Table 6.
Others selection
D1
D0
Switch position
X
0
SW3 = ON, SW4 = ON (selected internal pass), SW1 = b, SW2 = open
0
1
SW3 = OFF, SW4 = ON, SW1 = a, SW2 = a
1
SW3 = ON, SW4 = OFF, SW1 = b, SW2 = b
b
a
b
a
SW2
SW1
SOUND
EF FECTS
Volu m e & Filter
ACC select or
Input
Speaker
ACOUT
ACIN
Mixing
St age
SW3
SW4
相关PDF资料
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TDA7405TR SPECIALTY CONSUMER CIRCUIT, PQFP44
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