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LM49101TM

更新时间： 2024-02-10 17:48:24
品牌 Logo 应用领域
美国国家半导体 - NSC 开关放大器
页数 文件大小 规格书
30页 808K
描述
Mono Class AB Audio Subsystem with a True Ground Headphone Amplifier and Earpiece Switch

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中文翻译

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LM49101TM 技术参数

是否无铅：不含铅是否Rohs认证：符合
生命周期：Active包装说明：VFBGA, BGA25,5X5,16
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.33.00.01Factory Lead Time：16 weeks
风险等级：5.18Is Samacsys：N
信道分离：72 dB商用集成电路类型：VOLUME CONTROL CIRCUIT
JESD-30 代码：S-XBGA-B25JESD-609代码：e1
湿度敏感等级：1信道数量：2
功能数量：3端子数量：25
最高工作温度：85 °C最低工作温度：-40 °C
封装主体材料：UNSPECIFIED封装代码：VFBGA
封装等效代码：BGA25,5X5,16封装形状：SQUARE
封装形式：GRID ARRAY, VERY THIN PROFILE, FINE PITCH峰值回流温度（摄氏度）：260
电源：1.8/5,3.3/5,2.75 V认证状态：Not Qualified
子类别：Audio/Video Amplifiers最大压摆率：8.35 mA
最大供电电压 (Vsup)：5.5 V最小供电电压 (Vsup)：2.7 V
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：0.4 mm端子位置：BOTTOM
处于峰值回流温度下的最长时间：NOT SPECIFIEDBase Number Matches：1

LM49101TM 数据手册

 浏览型号LM49101TM的Datasheet PDF文件第2页浏览型号LM49101TM的Datasheet PDF文件第3页浏览型号LM49101TM的Datasheet PDF文件第4页浏览型号LM49101TM的Datasheet PDF文件第5页浏览型号LM49101TM的Datasheet PDF文件第6页浏览型号LM49101TM的Datasheet PDF文件第7页 
March 23, 2009  
LM49101  
Mono Class AB Audio Subsystem with a True Ground  
Headphone Amplifier and Earpiece Switch  
■ꢀOutput Power  
General Description  
The LM49101 is a fully integrated audio subsystem with a  
mono power amplifier capable of delivering 540mW of con-  
tinuous average power into an 8Ω BTL speaker load with 1%  
THD+N using a 3.3V supply. The LM49101 includes a sepa-  
rate stereo headphone amplifier that can deliver 44mW per  
channel into 32Ω loads using a 2.75V supply.  
The LM49101 has four input channels. A pair of single-ended  
inputs and a fully differential input channel with volume control  
and amplification stages. Additionally, a bypass differential  
input is available that connects directly to the mono speaker  
outputs through an analog switch without any amplification or  
volume control stages. The LM49101 features a 32–step dig-  
ital volume control on the input stage and an 8–step digital  
volume control on the headphone output stage.  
ꢀꢀVDDLS = 3.3V, VDDHP = 2.75V  
ꢀꢀ1% THD+N  
RL = 8Ω speaker  
540W (typ)  
40mW (typ)  
RL = 32Ω headphone  
■ꢀPSRR:  
ꢀꢀVDD = 3.3V, 217Hz ripple, Mono In  
■ꢀShutdown power supply current  
90dB (typ)  
0.01μA (typ)  
Features  
Differential mono input and stereo single-ended input  
Separate earpiece (receiver) differential input  
Analog switch for a separate earpiece path  
32-step digital volume control (-80 to +18dB)  
Three independent volume channels (Left, Right, Mono)  
Separate headphone volume control  
■
■
■
■
■
■
■
■
The digital volume control and output modes, programmed  
through a two-wire I2C compatible interface, allows flexibility  
in routing and mixing audio channels.  
The LM49101 is designed for cellular phones, PDAs, and  
other portable handheld applications. The high level of inte-  
gration minimizes external components. The True Ground  
headphone amplifier eliminates the physically large DC block-  
ing output capacitors reducing required board space and  
reducing cost.  
Flexible output for speaker and headphone output  
True Ground headphone amplifier eliminates large DC  
blocking capacitors reducing PCB space and cost.  
Hardware reset function  
■
■
■
■
■
■
■
RF immunity topology  
Key Specifications  
“Click and Pop” suppression circuitry  
Thermal shutdown protection  
Micro-power shutdown  
■ꢀSupply Voltage (VDDLS)  
■ꢀSupply Voltage (VDDHP)  
■ꢀI2C Supply Voltage  
■ꢀOutput power  
2.7V ≤VDDLS ≤5.5V  
1.8V ≤VDDHP ≤2.9V  
1.7V ≤I2CVDD ≤5.5V  
I2C control interface  
Available in space-saving microSMD package  
Applications  
ꢀꢀVDDLS = 5V, VDDHP = 2.75V  
ꢀꢀ 1% THD+N  
Portable electronic devices  
■
■
Mobile Phones  
RL = 8Ω speaker  
1.3W (typ)  
PDAs  
■
RL = 32Ω headphone  
45mW (typ)  
Boomer® is a registered trademark of National Semiconductor Corporation.  
© 2009 National Semiconductor Corporation  
300862  
www.national.com  
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