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BD3812F-E2 数据表(PDF) 5 Page - Rohm |
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BD3812F-E2 数据表(HTML) 5 Page - Rohm |
5 / 10 page 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 |
类似说明 - BD3812F-E2 |
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