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BD3812F-E2 数据表(PDF) 5 Page - Rohm

部件名 BD3812F-E2
功能描述  2ch Electronic Volume
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制造商  ROHM [Rohm]
网页  http://www.rohm.com
标志 ROHM - Rohm

BD3812F-E2 数据表(HTML) 5 Page - Rohm

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Technical Note
5/9
www.rohm.com
2010.06 - Rev.A
© 2010 ROHM Co., Ltd. All rights reserved.
BD3812F
4) SEL terminal setting
By determining the SEL terminal voltage, select address can be fixed.
An example of the SEL terminal voltage setting method is shown below.
Setting
P1
Condition
P2
Condition
Setting of
SEL(12pin) Terminal
SEL(12pin)
Terminal Voltage(V)
Select Address
D2
D1
Setting 1
VEE
VEE
0
0
Setting 2
VCC
VEE
VCC/3+2×VEE/3
0
1
Setting 3
VCC
VEE
VCC/3
1
0
Setting 4
VCC
VCC
1
1
SEL terminal voltage is DGND standard.
When to use several chips of BD3812F
Select address can be changed by setting SEL terminal (12pin), therefore, up to 4 chips can be used on a same bus line.
When to use one chip or two chips of this IC, use the setting 1 and the setting 4. In this case, the terminal voltage of 12pin
may be VCC or VEE, therefore external resistor of 12pin is unnecessary.
When to use BD3812F and BD3811K1 at the same time
By using BD3812F and BD3811K1 at the same time, independent control of 8ch volume can be made. And control is
available on a same bus line. In this case, be sure to set the SEL terminal setting to “setting 4”.
P2
20k
P1
10k
VEE
VCC
12
P1
VCC
12
P1
VEE
12
P2
10k
P1
20k
VEE
VCC
12


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