LM4834-MS National Semiconductor, LM4834-MS Datasheet

LM4834-MS

Manufacturer Part Number

LM4834-MS

Description

Manufacturer

National Semiconductor

Datasheet

1.LM4834-MS.pdf (14 pages)

Specifications of LM4834-MS

Case

SOP

Date_code

02+

Current page: 1 of 14
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LM4834

1.75W Audio Power Amplifier with DC Volume Control

and Microphone Preamp

General Description

The LM4834 is a monolithic integrated circuit that provides

DC volume control, and a bridged audio power amplifier

capable of producing 1.75W into 4Ω with less than 1.0%

(THD). In addition, the headphone/lineout amplifier is ca-

pable of driving 70 mW into 32Ω with less than 0.1%(THD).

The LM4834 incorporates a volume control and an input

microphone preamp stage capable of driving a 1 kΩ load

impedance.

Boomer

to provide high quality audio while requiring a minimum

amount of external components in surface mount packaging.

The LM4834 incorporates a DC volume control, a bridged

audio power amplifier and a microphone preamp stage,

making it optimally suited for multimedia monitors and desk-

top computer applications.

The LM4834 features an externally controlled, low-power

consumption shutdown mode, and both a power amplifier

and headphone mute for maximum system flexibility and

performance.

Block Diagram

Boomer

is a registered trademark of NationalSemiconductor Corporation.

audio integrated circuits were designed specifically

FIGURE 1. LM4834 Block Diagram

DS100015

10001501

Key Specifications

n THD at 1.1W continuous average output power into 8Ω

n Output Power into 4Ω at 1.0% THD+N

n THD at 70mW continuous average output power into

n Shutdown Current

n Supply Current

Features

n PC98 Compliant

n “Click and Pop” suppression circuitry

n Stereo line level outputs with mono input capability for

n Microphone preamp with buffered power supply

n DC Volume Control Interface

n Thermal shutdown protection circuitry

Applications

n Multimedia Monitors

n Desktop and Portable Computers

Connection Diagram

at 1kHz

32Ω at 1kHz

system beeps

See NS Package Number MSA028CB for SSOP

Order Number LM4834MS

SSOP Package

Top View

10001502

www.national.com

17.5mA (typ)

August 2000

1.0µA (max)

1.75W (typ)

0.5% (max)

0.1% (typ)

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