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LM4830M Datasheet(PDF) 11 Page - National Semiconductor (TI) |
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LM4830M Datasheet(HTML) 11 Page - National Semiconductor (TI) |
11 / 14 page Application Information (Continued) This feature is especially useful when the IC is used in por- table battery operated systems where energy conservation is imperative. In many applications, a microcontroller or microprocessor output interfaces to the LM4830 shutdown pin, providing a quick, smooth transition into shutdown. Another solution is to use a single-pole, single-throw switch in conjunction with an external pull-up resistor. When the switch is closed, the shut- down pin is connected to ground and enables the amplifier. If the switch is open, the external pull-up resistor disables the LM4830 by bringing the shutdown pin up to V DD. This scheme guarantees that the shutdown pin will not float, pre- venting unwanted state changes. Additionally, when the IC comes out of shutdown the IC’s volume attenuation setting will remain unchanged. www.national.com 11 |
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