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LM49450SQX/NOPB

更新时间： 2024-01-25 20:06:11
品牌 Logo 应用领域
德州仪器 - TI 放大器商用集成电路
页数 文件大小 规格书
42页 1037K
描述
Boomer I2S Input, 2.5W/Channel, Low EMI, Stereo, Class D Audio Sub-System with Ground Referenced Headphone Amplifier, 3D Enhancement, and Headphone Sense

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LM49450SQX/NOPB 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：HVQCCN, LCC28,.2SQ,20
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01Factory Lead Time：8 weeks
风险等级：5.48商用集成电路类型：AUDIO AMPLIFIER
JESD-30 代码：S-PQCC-N32JESD-609代码：e3
长度：5 mm湿度敏感等级：1
功能数量：2端子数量：28
最高工作温度：85 °C最低工作温度：-40 °C
封装主体材料：PLASTIC/EPOXY封装代码：HVQCCN
封装等效代码：LCC28,.2SQ,20封装形状：SQUARE
封装形式：CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE峰值回流温度（摄氏度）：260
电源：3.6/5 V认证状态：Not Qualified
筛选级别：AEC-Q100座面最大高度：0.8 mm
子类别：Audio/Video Amplifiers最大供电电压 (Vsup)：5.5 V
表面贴装：YES温度等级：INDUSTRIAL
端子面层：Matte Tin (Sn)端子形式：NO LEAD
端子节距：0.5 mm端子位置：QUAD
处于峰值回流温度下的最长时间：NOT SPECIFIED宽度：5 mm
Base Number Matches：1

LM49450SQX/NOPB 数据手册

 浏览型号LM49450SQX/NOPB的Datasheet PDF文件第1页浏览型号LM49450SQX/NOPB的Datasheet PDF文件第3页浏览型号LM49450SQX/NOPB的Datasheet PDF文件第4页浏览型号LM49450SQX/NOPB的Datasheet PDF文件第5页浏览型号LM49450SQX/NOPB的Datasheet PDF文件第6页浏览型号LM49450SQX/NOPB的Datasheet PDF文件第7页 
LM49450  
SNAS440D –FEBRUARY 2008–REVISED MAY 2013  
www.ti.com  
DESCRIPTION (CONTINUED)  
The filterless Class D amplifiers deliver 1.25W/channel into an 8Ω load with <1% THD+N with a 5V supply. The  
LM49450 offers two logic selectable modulation schemes, fixed frequency mode, and an EMI reducing spread  
spectrum mode. The 36mW/channel headphone drivers feature TI’s ground referenced architecture that creates  
a ground-referenced output from a single supply, eliminating the need for bulky and expensive DC-blocking  
capacitors, saving space and minimizing system cost. A headphone sense input (HPS) automatically detects the  
presence of a headphone, and configures the device accordingly.  
The LM49450 stereo, 24-bit DAC supports a wide range of sample rates (including 192kHz, 96kHz, 48kHz, and  
44.1kHz). The digital audio signal path features better than 100dB SNR, and low 0.05% THD+N when measured  
at the headphone outputs. The flexible 3-wire I2S interface supports left or right justified audio data.  
The LM49450 features separate 32-step volume control for the headphones and speaker outputs. 3D  
enhancement, mode selection, shutdown control, and volume are controlled through an I2C compatible interface.  
Output short circuit and thermal overload protection prevent the device from being damaged during fault  
conditions. Superior click and pop suppression eliminates audible transients on power-up/down and during  
shutdown. The LM49450 is available in a space saving 32-pin WQFN package.  
Typical Application  
V
DD  
2.7V to 5.5V  
DV  
DD  
IOV  
DD  
1.8V to 4.5V  
2.7V to 4.5V  
C
S
C
S
V
DD  
LSV  
DD  
LSV  
DD  
IOV  
DD  
DV  
DD  
LLS+  
LLS-  
MCLK  
I2S_CLK  
I2S_SDI  
I2S_WS  
CLASS D  
L
2
24-BIT  
32-STEP  
VOLUME  
CONTROL  
LSGND  
3D  
I S  
STEREO  
DAC  
PROCESSOR  
INTERFACE  
R
RLS+  
RLS-  
INL  
CLASS D  
INR  
BYPASS  
C
REF  
BYPASS  
HPV  
DD  
C
REF  
HPV  
DD  
C
S
OSCILLATOR  
HPL  
CLASS  
AB  
SDA  
SCL  
2
I2C  
BUS  
I C  
HPR  
CLASS  
AB  
INTERFACE  
CHARGE PUMP  
HPGND  
HPS  
GND  
DGND  
C1N  
C1P CPGND  
CPV  
DD  
HPV  
SS  
CPV  
DD  
C
2
C
1
C
S
Figure 1. Typical Audio Amplifier Application Circuit  
2
Submit Documentation Feedback  
Copyright © 2008–2013, Texas Instruments Incorporated  
Product Folder Links: LM49450  
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