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LM48824TM PDF预览

LM48824TM

更新时间: 2024-11-04 05:42:23
品牌 Logo 应用领域
美国国家半导体 - NSC 音频控制集成电路消费电路商用集成电路放大器
页数 文件大小 规格书
28页 1115K
描述
Class G Headphone Amplifier with I2C Volume Control

LM48824TM 技术参数

是否Rohs认证: 不符合生命周期:Transferred
包装说明:VFBGA, BGA16,4X4,16Reach Compliance Code:compliant
ECCN代码:EAR99HTS代码:8542.33.00.01
风险等级:5.4商用集成电路类型:VOLUME CONTROL CIRCUIT
JESD-30 代码:S-PBGA-B16长度:1.69 mm
湿度敏感等级:1信道数量:2
功能数量:1端子数量:16
最高工作温度:85 °C最低工作温度:-40 °C
标称输出功率:0.037 W封装主体材料:PLASTIC/EPOXY
封装代码:VFBGA封装等效代码:BGA16,4X4,16
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):225电源:3.6 V
认证状态:Not Qualified座面最大高度:0.6 mm
子类别:Audio/Video Amplifiers最大压摆率:1.3 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 SPECIFIED
宽度:1.69 mmBase Number Matches:1

LM48824TM 数据手册

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August 31, 2009  
LM48824  
Class G Headphone Amplifier with I2C Volume Control  
General Description  
Key Specifications  
The LM48824 is a Class G, ground-referenced stereo head-  
phone amplifier designed for portable devices. The LM48824  
features National’s ground-referenced architecture, which  
eliminates the large DC blocking capacitors required by tra-  
ditional headphone amplifiers, saving board space and mini-  
mizing system cost.  
Quiescent Power Supply Current at 3.6V  
Output Power/channel at VDD = 3.6V  
RL = 16Ω, THD+N 1%  
0.9mA (typ)  
37mW (typ)  
Output Power/channel at VDD = 3.6V  
RL = 32Ω, THD+N 1%  
The LM48824 takes advantage of National’s patent-pending  
Class G architecture offering power savings compared to a  
traditional Class AB headphone amplifier. Additionally, output  
noise is improved by common-mode sensing that corrects for  
any differences between the amplifier ground and the poten-  
tial at the headphone return terminal, minimizing noise creat-  
ed by any ground mismatches.  
29mW (typ)  
100dB (typ)  
PSRR at 217Hz  
Shutdown current  
2.5μA (typ)  
Features  
Class G Power Savings  
A high output impedance mode allows the LM48824's outputs  
to be driven by an external source without degrading the sig-  
nal. Other features include flexible power supply require-  
ments, differential inputs for improved noise rejection, a low  
power (2.5μA) shutdown mode, and a 32-step I2C volume  
control with mute function.  
Ground Referenced Headphone Outputs – Eliminates  
Output Coupling Capacitors  
Common-Mode Sense  
I2C Volume and Mode Control  
High Output Impedance in Shutdown  
Differential Inputs  
The LM48824's superior click and pop suppression eliminates  
audible transients on power-up/down and during shutdown.  
The LM48824 is available in an ultra-small 16-bump, 0.4mm  
pitch micro SMD package (1.69mm x 1.69mm)  
Advanced Click-and-Pop Suppression  
Low Supply Current  
Low THD mode option  
Applications  
Mobile Phones, PDAs, MP3 Players  
Portable Electronic Devices, Notebook PCs  
Simplified Block Diagram  
30089221  
Boomer® is a registered trademark of National Semiconductor Corporation.  
© 2009 National Semiconductor Corporation  
300892  
www.national.com  

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