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LM4546VHX PDF预览

LM4546VHX

更新时间: 2024-11-11 15:46:03
品牌 Logo 应用领域
德州仪器 - TI 商用集成电路
页数 文件大小 规格书
20页 356K
描述
SPECIALTY CONSUMER CIRCUIT, PQFP48, TQFP-48

LM4546VHX 技术参数

是否Rohs认证: 不符合生命周期:Obsolete
包装说明:LFQFP, QFP48,.35SQ,20Reach Compliance Code:compliant
HTS代码:8542.39.00.01风险等级:5.67
其他特性:IT ALSO REQUIRES 3V TO 5.5V DIGITAL SUPPLY商用集成电路类型:CONSUMER CIRCUIT
JESD-30 代码:S-PQFP-G48JESD-609代码:e0
长度:7 mm湿度敏感等级:2A
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):235
电源:5 V认证状态:Not Qualified
座面最大高度:1.6 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:Tin/Lead (Sn85Pb15)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:NOT SPECIFIED宽度:7 mm
Base Number Matches:1

LM4546VHX 数据手册

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September 2000  
LM4546  
AC ’97 Rev 2 Codec with Sample Rate Conversion and  
National 3D Sound  
General Description  
Key Specifications  
The LM4546 is an audio codec for PC systems which is fully  
PC98 compliant and performs the analog intensive functions  
of the AC97 Rev 2 architecture. Using 18-bit Sigma-Delta  
A/D’s and D/A’s, the LM4546 provides 90dB of Dynamic  
Range.  
h
h
h
Analog Mixer Dynamic Range  
D/A Dynamic Range  
97dB (typ)  
89dB (typ)  
90dB (typ)  
A/D Dynamic Range  
The LM4546 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 2 stereo and 3 mono inputs, each  
of which has separate gain, attenuation and mute control.  
The LM4546 also provides National’s 3D Sound stereo en-  
hancement.  
Features  
n AC’97 Rev 2 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 Advanced power management support  
n Digital 3V and 5V compliant  
The LM4546 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 flex-  
ibility and increased performance.  
Applications  
n Desktop PC Audio Systems  
n Portable PC Systems  
n Mobile PC Systems  
Block Diagram  
DS100985-1  
FIGURE 1. LM4546 Block Diagram  
© 2000 National Semiconductor Corporation  
DS100985  
www.national.com  

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