LM4830M datasheet(11/14 Pages) NSC

Teilenummer	LM4830M

Bauteilbeschribung	Two-Way Audio Amplification System with Volume Control

PDF	14 Pages

Scroll/Zoom	100%

Hersteller	NSC [National Semiconductor (TI)]

Direct Link	http://www.national.com

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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.

LM4830M Datenblatt(PDF) 11 Page - National Semiconductor (TI)