Datasheet > LM4912MM

LM4912MM

更新时间： 2024-01-06 18:24:08

品牌	Logo	应用领域
美国国家半导体 - NSC		商用集成电路放大器光电二极管
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描述
Stereo 40mW Low Noise Headphone Amplifier

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LM4912MM 数据手册

June 2003

LM4912

Stereo 40mW Low Noise Headphone Amplifier

General Description

Key Specifications

n PSRR at 217 Hz and 1kHz

65dB (typ)

The LM4912 is an stereo audio power amplifier capable of

delivering 40mW per channel of continuous average power

into a 16Ω load or 25mW per channel into a 32Ω load at 1%

THD form a 3V power supply.

n Output Power at 1kHz with V_DD= 2.4V, 1% THD+N into

a 16Ω load 25mW (typ)

n Output Power at 1kHz with V_DD= 3V, 1% THD+N into a

16Ω load

n Shutdown Current

n Output Voltage change on release from Shutdown

V_DD= 2.4V, R_L= 16Ω

n Output Noise, 20Hz to 20kHz, A-weighted

40mW (typ)

1.0µA (max)

Boomer audio power amplifiers were designed specifically to

provide high quality output power with a minimal amount of

external components. Since the LM4912 does not require

bootstrap capacitors or snubber networks, it is optimally

suited for low-power portable systems.

1mV (max)

10µV (typ)

The LM4912 features a low-power consumption shutdown

mode and a power mute mode that allows for faster turn on

time with less than 1mV voltage change at outputs on re-

lease. Additionally, the LM4912 features an internal thermal

shutdown protection mechanism.

Features

n External gain-setting capability

n Available in space-saving MSOP package

n Ultra low current shutdown mode

The LM4912 is unity gain stable and may be configured with

external gain-setting resistors.

n Mute mode allows fast turn-on (10ms) with less than

1mV change on outputs

n 2.0V - 5.5V operation

n Ultra low noise

n Operation at low supply voltages

Applications

n Portable CD players

n PDAs

n Portable electronics devices

Typical Application

20048180

FIGURE 1. Typical Capacitive Coupled Output Configuration Circuit

Boomer^®is a registered trademark of National Semiconductor Corporation.

DS200481

www.national.com

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与LM4912MM相关器件

型号	品牌	获取价格	描述	数据表
LM4912MM/NOPB	TI	获取价格	0.145W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO10, MSOP-10
LM4912MM/NOPB	ROCHESTER	获取价格	0.145W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO10, MSOP-10
LM4912MMX/NOPB	TI	获取价格	IC,HEADPHONE DRIVER,TSSOP,10PIN,PLASTIC
LM4913	NSC	获取价格	2W Monaural, 90mW Stereo Headphone Audio Amplifier
LM4913MH	NSC	获取价格	2W Monaural, 90mW Stereo Headphone Audio Amplifier
LM4913MHX/NOPB	TI	获取价格	IC,HEADPHONE DRIVER,TSSOP,10PIN,PLASTIC
LM4913MM	NSC	获取价格	2W Monaural, 90mW Stereo Headphone Audio Amplifier
LM4914	NSC	获取价格	1W Monaural, 85mW Stereo Headphone Audio Amplifier
LM4914MH	NSC	获取价格	1W Monaural, 85mW Stereo Headphone Audio Amplifier
LM4914MHX/NOPB	NSC	获取价格	IC,HEADPHONE DRIVER,TSSOP,10PIN,PLASTIC