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LM4548AVHX PDF预览

LM4548AVHX

更新时间： 2024-02-08 00:05:57
品牌 Logo 应用领域
美国国家半导体 - NSC 商用集成电路
页数 文件大小 规格书
19页 337K
描述
IC,SOUNDCARD CIRCUITS,CMOS,QFP,48PIN,PLASTIC

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中文翻译

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LM4548AVHX 技术参数

是否Rohs认证： 不符合生命周期：Obsolete
包装说明：QFP, QFP48,.35SQ,20Reach Compliance Code：compliant
风险等级：5.92商用集成电路类型：CONSUMER CIRCUIT
JESD-30 代码：S-PQFP-G48JESD-609代码：e0
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：QFP封装等效代码：QFP48,.35SQ,20
封装形状：SQUARE封装形式：FLATPACK
电源：5 V认证状态：Not Qualified
子类别：Other Consumer ICs表面贴装：YES
技术：CMOS温度等级：INDUSTRIAL
端子面层：Tin/Lead (Sn85Pb15)端子形式：GULL WING
端子节距：0.5 mm端子位置：QUAD
Base Number Matches：1

LM4548AVHX 数据手册

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November 2002  
LM4548A  
AC ’97 Rev 2 Codec with Sample Rate Conversion and  
National 3D Sound  
General Description  
Key Specifications  
n Analog Mixer Dynamic Range  
n D/A Dynamic Range  
97dB (typ)  
89dB (typ)  
90dB (typ)  
The LM4548A is an audio codec for PC systems which is  
fully PC98 compliant and performs the analog intensive  
functions of the AC97 Rev2 architecture. Using 18-bit  
Sigma-Delta A/D’s and D/A’s, the LM4548A provides 90dB of  
Dynamic Range.  
n A/D Dynamic Range  
Features  
The LM4548A 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 LM4548A also provides the additional True Line-Level  
output and National’s 3D Sound stereo enhancement.  
n AC’97 Rev2 compliant  
n National’s 3D Sound circuitry  
n High quality Sample Rate Conversion (SRC) from 4kHz  
to 48kHz in 1Hz increments.  
n Multiple Codec Support  
n True Line Level Output with volume control in addition to  
standard Line Out  
n Advanced power management support  
n Digital 3V and 5V compliant  
The LM4548A supports variable sample rate conversion as  
defined in the AC97 Rev2 specification. The sample rate for  
the A/D and D/A can be programmed separately to convert  
any rate between 4kHz - 48kHz with a resolution of 1Hz. The  
AC97 architecture separates the analog and digital functions  
of the PC audio system allowing both for system design  
flexibility and increased performance.  
Applications  
n Desktop PC Audio Systems  
n Portable PC Systems  
n Mobile PC Systems  
Block Diagram  
20030001  
FIGURE 1. LM4548A Block Diagram  
© 2002 National Semiconductor Corporation  
DS200300  
www.national.com  
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