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参数资料
| 型号： | LM4894MDC |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 1 W, 1 CHANNEL, AUDIO AMPLIFIER, UUC |
| 封装： | DIE |
| 文件页数： | 13/21页 |
| 文件大小： | 781K |
| 代理商： | LM4894MDC |
National P/N LM4894 - 1 Watt Fully Differential Audio Power Amplifier With Shutdown Select
LM4894 MDC
Full production
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LM4894 MWC
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General Description
The LM4894 is a fully differential audio power amplifier primarily designed for demanding applications in
mobile phones and other portable communication device applications. It is capable of delivering 1 watt of
continuous average power to an 8
BTL load with less than 1% distortion (THD+N) from a 5VDC power
supply.
Boomer audio power amplifiers were designed specifically to provide high quality output power with a
minimal amount of external components. The LM4894 does not require output coupling capacitors or
bootstrap capacitors, and therefore is ideally suited for mobile phone and other low voltage applications
where minimal power consumption is a primary requirement.
The LM4894 features a low-power consumption shutdown mode. To facilitate this, Shutdown may be enabled
by either logic high or low depending on mode selection. Driving the shutdown mode pin either high or low
enables the shutdown select pin to be driven in a likewise manner to enable Shutdown. Additionally, the
LM4894 features an internal thermal shutdown protection mechanism.
The LM4894 contains advanced pop & click circuitry which eliminates noises which would otherwise occur
during turn-on and turn-off transitions.
The LM4894 is unity-gain stable and can be configured by external gain-setting resistors.
Features
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Fully differential amplification
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Available in space-saving packages micro SMD, MSOP, and LLP
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Ultra low current shutdown mode
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Can drive capacitive loads up to 500 pF
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Improved pop & click circuitry eliminates noises during turn-on and turn-off transitions
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2.2 - 5.5V operation
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No output coupling capacitors, snubber networks or bootstrap capacitors required
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Unity-gain stable
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External gain configuration capability
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Shutdown high or low selectivity
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High CMRR
Key Specification
Improved PSRR at 217Hz
80dB(typ)
Power Output at 5.0V & 1% THD
1.0W(typ)
Power Output at 3.3V & 1% THD 400mW(typ)
Shutdown Current
0.1A(typ)
Applications
file:///H|/imaging/BITTING/cpl/20020808_1/08062002_10/NATL/08062002_HTML/LM4894.html (2 of 3) [09-Aug-2002 2:51:00 PM]
相关PDF资料 |
PDF描述 |
|---|---|
| LM4894MWC | 1 W, 1 CHANNEL, AUDIO AMPLIFIER, UUC |
| LM4895MDC | 0.35 W, 1 CHANNEL, AUDIO AMPLIFIER, UUC |
| LM4895MWC | 0.35 W, 1 CHANNEL, AUDIO AMPLIFIER, UUC |
| LM4895MM/NOPB | 0.35 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO10 |
| LM4895LD/NOPB | 1.4 W, 1 CHANNEL, AUDIO AMPLIFIER, DSO10 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LM4894MM | 制造商:Texas Instruments 功能描述: |
| LM4894MM/NOPB | 功能描述:IC AMP AUDIO PWR 1.4W AB 10MSOP RoHS:是 类别:集成电路 (IC) >> 线性 - 音頻放大器 系列:Boomer® 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:DirectDrive® 类型:H 类 输出类型:耳机，2-通道（立体声） 在某负载时最大输出功率 x 通道数量:35mW x 2 @ 16 欧姆 电源电压:1.62 V ~ 1.98 V 特点:I²C，麦克风，静音，短路保护，音量控制 安装类型:表面贴装 供应商设备封装:25-WLP（2.09x2.09） 封装/外壳:25-WFBGA，WLCSP 包装:带卷 (TR) |
| LM4894MMX | 功能描述:音频放大器 RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| LM4894MMX/NOPB | 功能描述:音频放大器 RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| LM4895 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:1 Watt Fully Differential Audio Power Amplifier With Shutdown Select and Fixed 6dB Gain |
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