LM4832N datasheet(1/22 Pages) NSC

tên linh kiện	LM4832N

Giải thích chi tiết về linh kiện	Digitally Controlled Tone and Volume Circuit with Stereo Audio Power Amplifier, Microphone Preamp Stage and National 3D Sound

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LM4832

Digitally Controlled Tone and Volume Circuit with Stereo

Audio Power Amplifier, Microphone Preamp Stage and

National 3D Sound

General Description

The LM4832 is a monolithic integrated circuit that provides

volume and tone (bass and treble) controls as well as a ste-

reo audio power amplifier capable of producing 250 mW

(typ) into 8

Ω or 90 mW (typ) into 32Ω with less than 1.0%

THD. In addition, a two input microphone preamp stage, with

volume control, capable of drivinga1k

Ω load is imple-

mented on chip.

The LM4832 also features National’s 3D Sound circuitry

which can be externally adjusted via a simple RC network.

For maximum system flexibility, the LM4832 has an exter-

nally controlled, low-power consumption shutdown mode,

and an independent mute for power and microphone ampli-

fiers .

Boomer® audio integrated circuits were designed specifically

to provide high quality audio while requiring few external

components. Since the LM4832 incorporates tone and vol-

ume controls, a stereo audio power amplifier and a micro-

phone preamp stage, it is optimally suited to multimedia

monitors and desktop computer applications.

Key Specifications

n

Output Power at 10% into:

8

Ω

32

Ω

350 mW(typ)

100 mW(typ)

n

THD+Nat75mW into

32

Ω at 1 kHz

0.5%(max)

n

Microphone Input Referred

Noise

7 µV(typ)

n

Supply Current

13 mA(typ)

n

Shutdown Current

4 µA(max)

Features

n

Independent Left and Right Output Volume Controls

n

Treble and Bass Control

n

National 3D Sound

n

I

2C Compatible Interface

n

Two Microphone Inputs with Selector

n

Software Controlled Shutdown Function

Applications

n

Multimedia Monitors

n

Portable and Desktop Computers

Block Diagram

Connection Diagram

Boomer® is a registered trademark of National Semiconductor Corporation.

DS100014-1

FIGURE 1. LM4832 Block Diagram

DS100014-2

Top View

Order Number LM4832N, LM4832M

See NS Package Number N28B for DIP

See NS Package Number M28B for SOIC

February 1998

DS100014

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Số phần tương tự - LM4832N

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Mô tả tương tự - LM4832N

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