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LM4832M 参数 Datasheet PDF下载

LM4832M图片预览
型号: LM4832M
PDF下载: 下载PDF文件 查看货源
内容描述: 数字控制音调和音量电路与立体声音频功率放大器,麦克风前置放大器级和全国3D音效 [Digitally Controlled Tone and Volume Circuit with Stereo Audio Power Amplifier, Microphone Preamp Stage and National 3D Sound]
分类和应用: 放大器功率放大器
文件页数/大小: 22 页 / 691 K
品牌: NSC [ National Semiconductor ]
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February 1998  
LM4832  
Digitally Controlled Tone and Volume Circuit with Stereo  
Audio Power Amplifier, Microphone Preamp Stage and  
National 3D Sound  
General Description  
Key Specifications  
The LM4832 is a monolithic integrated circuit that provides  
volume and tone (bass and treble) controls as well as a ste-  
reo audio power amplifier capable of producing 250 mW  
(typ) into 8or 90 mW (typ) into 32with less than 1.0%  
THD. In addition, a two input microphone preamp stage, with  
volume control, capable of driving a 1 kload is imple-  
mented on chip.  
n Output Power at 10% into:  
8Ω  
32Ω  
350 mW(typ)  
100 mW(typ)  
n THD + N at 75 mW into  
32at 1 kHz  
0.5%(max)  
7 µV(typ)  
n Microphone Input Referred  
The LM4832 also features National’s 3D Sound circuitry  
which can be externally adjusted via a simple RC network.  
For maximum system flexibility, the LM4832 has an exter-  
nally controlled, low-power consumption shutdown mode,  
and an independent mute for power and microphone ampli-  
fiers .  
Boomer® audio integrated circuits were designed specifically  
to provide high quality audio while requiring few external  
components. Since the LM4832 incorporates tone and vol-  
ume controls, a stereo audio power amplifier and a micro-  
phone preamp stage, it is optimally suited to multimedia  
monitors and desktop computer applications.  
Noise  
n Supply Current  
13 mA(typ)  
4 µA(max)  
n Shutdown Current  
Features  
n Independent Left and Right Output Volume Controls  
n Treble and Bass Control  
n National 3D Sound  
n I2C Compatible Interface  
n Two Microphone Inputs with Selector  
n Software Controlled Shutdown Function  
Applications  
n Multimedia Monitors  
n Portable and Desktop Computers  
Block Diagram  
Connection Diagram  
DS100014-2  
Top View  
Order Number LM4832N, LM4832M  
See NS Package Number N28B for DIP  
DS100014-1  
FIGURE 1. LM4832 Block Diagram  
See NS Package Number M28B for SOIC  
Boomer® is a registered trademark of National Semiconductor Corporation.  
© 1998 National Semiconductor Corporation  
DS100014  
www.national.com