Datasheet > LM4982TL

LM4982TL

更新时间： 2024-01-31 15:09:34

品牌	Logo	应用领域
美国国家半导体 - NSC		放大器
页数	文件大小	规格书
21页	1569K
描述
Ground-Referenced, Ultra Low Noise, 80mW Stereo Headphone Amplifier with IntelliSense and I2C Volume

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LM4982TL 技术参数

是否Rohs认证：	符合	生命周期：	Obsolete
包装说明：	FBGA, BGA16,4X4,20	Reach Compliance Code：	compliant
ECCN代码：	EAR99	HTS代码：	8542.33.00.01
风险等级：	5.73	商用集成电路类型：	VOLUME CONTROL CIRCUIT
JESD-30 代码：	S-PBGA-B16	JESD-609代码：	e1
湿度敏感等级：	1	功能数量：	2
端子数量：	16	最高工作温度：	85 °C
最低工作温度：	-40 °C	封装主体材料：	PLASTIC/EPOXY
封装代码：	FBGA	封装等效代码：	BGA16,4X4,20
封装形状：	SQUARE	封装形式：	GRID ARRAY, FINE PITCH
峰值回流温度（摄氏度）：	260	电源：	3 V
认证状态：	Not Qualified	子类别：	Audio/Video Amplifiers
最大压摆率：	11.5 mA	表面贴装：	YES
温度等级：	INDUSTRIAL	端子面层：	Tin/Silver/Copper (Sn/Ag/Cu)
端子形式：	BALL	端子节距：	0.5 mm
端子位置：	BOTTOM	处于峰值回流温度下的最长时间：	NOT SPECIFIED
Base Number Matches：	1

LM4982TL 数据手册

February 2006

LM4982

Ground-Referenced, Ultra Low Noise, 80mW Stereo

Headphone Amplifier with IntelliSense and I2C Volume

Control

General Description

Key Specifications

The LM4982 is a ground referenced, variable gain audio

power amplifier capable of delivering 80mW of continuous

average power into a 16Ω single-ended load with less than

1% THD+N from a 3V power supply. The I²C volume control

allows +18 to -76 dB gain settings.

Improved PSRR at 217Hz

Stereo Output Power at V_DD= 3V,

R_L= 32Ω, THD+N = 1%

Shutdown current

66dB

51mW (typ)

0.1µA (typ)

The LM4982 utilizes advanced charge pump technology to

generate the LM4982’s negative supply voltage. This elimi-

nates the need for output-coupling capacitors typically used

with single-ended loads.

Features

n Ground referenced outputs

n I²C Volume and mode controls

IntelliSense is a new circuit technology that allows the

LM4982 to detect whether a mono or stereo headphone plug

has been inserted into the output jack.

n Available in space-saving micro SMD package

n Ultra low current shutdown mode

n Advanced pop & click circuitry eliminates noises during

turn-on and turn-off transitions

n 1.6 – 4.0V operation

n No output coupling capacitors, snubber networks,

bootstrap capacitors or gain-setting resistors required

n Mono/Stereo headphone detect

Boomer audio power amplifiers were designed specifically to

provide high quality output power with a minimal amount of

external components. The LM4982 does not require output

coupling capacitors or bootstrap capacitors, and therefore is

ideally suited for mobile phone and other low voltage appli-

cations where minimal power consumption is a primary re-

quirement.

The LM4982 incorporates selectable low-power consump-

tion shutdown and channel select modes.

Applications

n Notebook PCs

n Desktop PCs

n Mobile Phones

n PDAs

The LM4982 contains advanced pop & click circuitry that

eliminates noises which would otherwise occur during

turn-on and turn-off transitions.

n Portable electronic devices

n MP3 Players

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

DS201614

www.national.com

12 3 4 5 6 7...21

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与LM4982TL相关器件

型号	品牌	描述	获取价格	数据表
LM4982TLX/NOPB	TI	AUDIO AMPLIFIER	获取价格
LM4985	NSC	Stereo 135mW Low Noise Headphone Amplifier with Selectable Capacitively Coupled or Output	获取价格
LM4985TM	NSC	Stereo 135mW Low Noise Headphone Amplifier with Selectable Capacitively Coupled or Output	获取价格
LM4985TMX	NSC	暂无描述	获取价格
LM4990	NSC	2 Watt Audio Power Amplifier with Selectable Shutdown Logic Level	获取价格
LM4990	TI	2 Watt Audio Power Amplifier with Selectable Shutdown Logic Level	获取价格

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