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LM4941SD

更新时间： 2024-11-25 04:20:07
品牌 Logo 应用领域
美国国家半导体 - NSC 放大器射频功率放大器
页数 文件大小 规格书
16页 380K
描述
1.25 Watt Fully Differential Audio Power Amplifier With RF Suppression and Shutdown

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中文翻译

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LM4941SD 技术参数

是否Rohs认证： 不符合生命周期：Transferred
包装说明：LLP-8Reach Compliance Code：not_compliant
ECCN代码：EAR99HTS代码：8542.33.00.01
风险等级：5.29标称带宽：20 kHz
商用集成电路类型：AUDIO AMPLIFIERJESD-30 代码：R-XDSO-N8
JESD-609代码：e0长度：3 mm
湿度敏感等级：1信道数量：1
功能数量：1端子数量：8
最高工作温度：85 °C最低工作温度：-40 °C
标称输出功率：1.54 W封装主体材料：UNSPECIFIED
封装代码：VSON封装等效代码：SOLCC8,.11,20
封装形状：RECTANGULAR封装形式：SMALL OUTLINE, VERY THIN PROFILE
电源：3/5 V认证状态：Not Qualified
座面最大高度：0.8 mm子类别：Audio/Video Amplifiers
最大压摆率：2.3 mA最大供电电压 (Vsup)：5.5 V
最小供电电压 (Vsup)：2.4 V表面贴装：YES
温度等级：INDUSTRIAL端子面层：Tin/Lead (Sn85Pb15)
端子形式：NO LEAD端子节距：0.5 mm
端子位置：DUAL宽度：2.5 mm

LM4941SD 数据手册

 浏览型号LM4941SD的Datasheet PDF文件第2页浏览型号LM4941SD的Datasheet PDF文件第3页浏览型号LM4941SD的Datasheet PDF文件第4页浏览型号LM4941SD的Datasheet PDF文件第5页浏览型号LM4941SD的Datasheet PDF文件第6页浏览型号LM4941SD的Datasheet PDF文件第7页 
March 2007  
LM4941ꢀ  
1.25 Watt Fully Differential Audio Power Amplifier With RF  
Suppression and Shutdown  
General Description  
Key Specifications  
The LM4941 is a fully differential audio power amplifier pri-  
marily designed for demanding applications in mobile phones  
and other portable communication device applications. It is  
capable of delivering 1.25 watts of continuous average power  
to a 8Ω load with less than 1% distortion (THD+N) from a  
5VDC power supply. The LM4941 does not require output  
coupling capacitors or bootstrap capacitors, and therefore is  
ideally suited for mobile phone and other small form factor  
applications where minimal PCB space is a primary require-  
ment.  
■ꢀImproved PSRR at 217Hz  
■ꢀPower Output, VDD = 5.0V,  
ꢀRL = 8Ω, 1% THD+N  
95dB (typ)  
1.25W (typ)  
■ꢀPower Output, VDD = 3.0V,  
ꢀRL = 8Ω, 1% THD+N  
430mW (typ)  
0.1µA (typ)  
■ꢀShutdown Current  
Features  
The LM4941 also features proprietary internal circuitry that  
suppresses the coupling of RF signals into the chip. This is  
important because certain types of RF signals (such as GSM)  
can couple into audio amplifiers in such a way that part of the  
signal is heard through the speaker. The RF suppression cir-  
cuitry in the LM4941 makes it well-suited for portable appli-  
cations in which strong RF signals generated by an antenna  
from or a cellular phone or other portable electronic device  
may couple audibly into the amplifier.  
Improved RF suppression, by up to 20dB over previous  
designs in selected applications  
■
Fully differential amplification  
■
■
■
■
■
Available in space-saving micro SMD package  
Ultra low current shutdown mode  
Can drive capacitive loads up to 100pF  
Improved pop & click circuitry eliminates noises during  
turn-on and turn-off transitions  
Other features include a low-power consumption shutdown  
mode, internal thermal shutdown protection, and advanced  
pop & click circuitry.  
2.4 - 5.5V operation  
■
■
No output coupling capacitors, snubber networks or  
bootstrap capacitors required  
Applications  
Mobile phones  
■
■
■
PDAs  
Portable electronic devices  
Typical Application  
20170366  
FIGURE 1. Typical Audio Amplifier Application Circuit  
Boomer® is a registered trademark of National Semiconductor Corporation.  
© 2007 National Semiconductor Corporation  
201703  
www.national.com  
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