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参数资料
| 型号： | LM4840MT/NOPB |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 音频控制 |
| 英文描述： | 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO28 |
| 封装： | TSSOP-28 |
| 文件页数： | 14/22页 |
| 文件大小： | 829K |
| 代理商： | LM4840MT/NOPB |
National P/N LM4840 - Stereo 2W Audio Power Amplifiers with Digital Volume Control and Input Mux
The LM4840 is a monolithic integrated circuit that provides digital volume control and stereo bridged audio
power amplifiers capable of producing 2W into 4
with less than 1.0% THD or 2.2W into 3
with less than
1.0% THD.
Boomer audio integrated circuits were designed specifically to provide high quality audio while requiring a
minimum amount of external components. The LM4840 incorporates a digital volume control, stereo bridged
audio power amplifiers, an input mux, and a last volume level memory function to save the volume setting
during shutdown. These features make it optimally suited for multimedia monitors, portable radios, desktop,
and portable computer applications.
The LM4840 features an externally controlled, low-power consumption shutdown mode, and both a power
amplifier and headphone mute for maximum system flexibility and performance.
Features
q
PC98 and PC99 Compliant
q
Digital Volume Control Interface
q
System Beep Detect
q
Stereo switchable bridged/single-ended power amplifiers
q
"Click and pop" suppression circuitry
q
Thermal shutdown protection circuitry
q
Input Mux
q
Capless headphone drivers
q
Last volume memory from shutdown
Key Specification
PO at 1% THD+N
into 3
(LM4840LQ, LM4840MH) 2.2W (typ)
into 4
(LM4840LQ, LM4840MH) 2.0W (typ)
into 8
(LM4840) 1.1W (typ)
Single-ended mode - THD+N at 85mW into 32
1.0% (typ)
Shutdown current 0.2A (typ)
Applications
q
Portable and Desktop Computers
q
Multimedia Monitors
q
Portable Radios, PDAs, and Portable TVs
[Information as of 5-Aug-2002]
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LM4841 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Stereo 2W Amplifiers with DC Volume Control, Transient Free Outputs, and Cap-less Headphone Drive |
| LM48410 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Low EMI, Filterless, 2.3W Stereo Class D Audio Power Amplifier with National 3D Enhancement |
| LM48410SQ | 制造商:Texas Instruments 功能描述:Audio Amp Speaker 2-CH Stereo 2.3W Class-D 24-Pin LLP EP T/R 制造商:Texas Instruments 功能描述:AMP, POWER, CLASS D, 2.3W, LLP-24 |
| LM48410SQ/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 |
| LM48410SQBD | 功能描述:音频 IC 开发工具 LM48410 EVAL BOARD RoHS:否 制造商:Texas Instruments 产品:Evaluation Kits 类型:Audio Amplifiers 工具用于评估:TAS5614L 工作电源电压:12 V to 38 V |
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