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LM4550BVH/NOPB

更新时间： 2024-09-28 13:09:23
品牌 Logo 应用领域
美国国家半导体 - NSC 解码器编解码器放大器
页数 文件大小 规格书
25页 503K
描述
IC SPECIALTY CONSUMER CIRCUIT, PQFP48, 7 X 7 MM, 1.40 MM HEIGHT, ROHS COMPLIANT, LQFP-48, Consumer IC:Other

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LM4550BVH/NOPB 技术参数

是否Rohs认证：符合生命周期：Transferred
包装说明：LFQFP, QFP48,.35SQ,20Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5Is Samacsys：N
其他特性：ALSO REQUIRES 3V TO 5.5V SUPPLY商用集成电路类型：CONSUMER CIRCUIT
JESD-30 代码：S-PQFP-G48JESD-609代码：e3
长度：7 mm湿度敏感等级：3
功能数量：1端子数量：48
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：LFQFP
封装等效代码：QFP48,.35SQ,20封装形状：SQUARE
封装形式：FLATPACK, LOW PROFILE, FINE PITCH峰值回流温度（摄氏度）：260
电源：3.3/5,5 V认证状态：Not Qualified
座面最大高度：1.4 mm子类别：Other Consumer ICs
最大供电电压 (Vsup)：5.5 V最小供电电压 (Vsup)：4.2 V
表面贴装：YES温度等级：INDUSTRIAL
端子面层：Matte Tin (Sn)端子形式：GULL WING
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：40宽度：7 mm
Base Number Matches：1

LM4550BVH/NOPB 数据手册

 浏览型号LM4550BVH/NOPB的Datasheet PDF文件第2页浏览型号LM4550BVH/NOPB的Datasheet PDF文件第3页浏览型号LM4550BVH/NOPB的Datasheet PDF文件第4页浏览型号LM4550BVH/NOPB的Datasheet PDF文件第5页浏览型号LM4550BVH/NOPB的Datasheet PDF文件第6页浏览型号LM4550BVH/NOPB的Datasheet PDF文件第7页 
December 2002  
LM4550  
AC ’97 Rev 2.1 Multi-Channel Audio Codec with Stereo  
Headphone Amplifier, Sample Rate Conversion and  
National 3D Sound  
General Description  
Key Specifications  
n Analog Mixer Dynamic Range  
n D/A Dynamic Range  
n A/D Dynamic Range  
n Headphone Amp THD+N at 50 mW  
into 32Ω  
97dB (typ)  
89dB (typ)  
90dB (typ)  
0.02% (typ)  
The LM4550 is an audio codec for PC systems which is fully  
PC99 compliant and performs the analog intensive functions  
of the AC97 Rev2.1 architecture. Using 18-bit Sigma-Delta  
A/D’s and D/A’s, the LM4550 provides 90 dB of Dynamic  
Range.  
The LM4550 was designed specifically to provide a high  
quality audio path and provide all analog functionality in a PC  
audio system. It features full duplex stereo A/D’s and D/A’s  
and an analog mixer with 4 stereo and 3 mono inputs, each  
of which has separate gain, attenuation and mute control.  
The LM4550 provides a stereo headphone amplifier with an  
independent gain control and also supports National’s 3D  
Sound stereo enhancement and variable sample rate con-  
version. The sample rate for the A/D and D/A can be pro-  
grammed separately with a resolution of 1 Hz to convert any  
rate between 4 kHz–48 kHz.  
Features  
n AC’97 Rev 2.1 compliant  
n Several LM4550s can be combined together for up to 6  
channel operation  
n Unique National chaining function allows multiple codecs  
to be connected serially and use only a single controller  
SDATA_IN pin  
n High quality Sample Rate Conversion (SRC) from 4 kHz  
to 48 kHz in 1 Hz increments.  
n Stereo headphone amp with separate gain control  
n National’s 3D Sound circuitry  
n External Amplifier Power Down (EAPD) control from  
codec  
n PC-Beep passthrough to Line Out while reset is held  
active low  
n Digital 3.3V and 5V compliant  
The LM4550 features the ability to connect several codecs  
together in a system to provide up to six channels for sur-  
round sound applications. Multiple codec systems can be  
built using the standard AC-Link format of one serial data  
stream per codec, or using a unique National Semiconductor  
feature for chaining codecs together. This chain feature re-  
quires only a single data stream to the controller.  
The AC97 architecture separates the analog and digital func-  
tions of the PC audio system allowing both for system design  
flexibility and increased performance.  
Applications  
n Desktop PC audio systems on PCI cards, AMR cards, or  
with motherboard chips sets featuring AC-Link  
n Portable PC systems as on MDC cards, or with a  
chipset or accelerator featuring AC-Link  
n 2, 4, or 6 channel systems  
© 2002 National Semiconductor Corporation  
DS100972  
www.national.com  
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LM4550BVH/NOPB 替代型号

型号 品牌 替代类型 描述 数据表
LM4550BVHX/NOPB TI

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