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LM1973M/NOPB PDF预览

LM1973M/NOPB

更新时间: 2024-09-28 16:16:15
品牌 Logo 应用领域
美国国家半导体 - NSC 光电二极管商用集成电路
页数 文件大小 规格书
12页 341K
描述
IC SPECIALTY CONSUMER CIRCUIT, PDSO20, 0.300 INCH, PLASTIC, SOP-20, Consumer IC:Other

LM1973M/NOPB 技术参数

是否Rohs认证: 符合生命周期:Transferred
包装说明:SOP, SOP20,.4Reach Compliance Code:unknown
风险等级:5.05商用集成电路类型:CONSUMER CIRCUIT
JESD-30 代码:R-PDSO-G20JESD-609代码:e3
长度:12.8 mm湿度敏感等级:3
端子数量:20最高工作温度:70 °C
最低工作温度:封装主体材料:PLASTIC/EPOXY
封装代码:SOP封装等效代码:SOP20,.4
封装形状:RECTANGULAR封装形式:SMALL OUTLINE
峰值回流温度(摄氏度):260电源:+-6 V
认证状态:Not Qualified座面最大高度:2.65 mm
子类别:Audio Control ICs最大压摆率:5 mA
表面贴装:YES技术:CMOS
温度等级:COMMERCIAL端子面层:Matte Tin (Sn)
端子形式:GULL WING端子节距:1.27 mm
端子位置:DUAL处于峰值回流温度下的最长时间:NOT SPECIFIED
宽度:7.5 mmBase Number Matches:1

LM1973M/NOPB 数据手册

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December 1994  
LM1973  
µPot 3-Channel 76dB Audio Attenuator with Mute  
General Description  
Key Specifications  
n Total Harmonic Distortion + Noise:  
n Frequency response:  
n Attenuation range (excluding mute):  
n Differential attenuation:  
0.003% (max)  
100 kHz (−3dB) (min)  
76dB (typ)  
The LM1973 is a digitally controlled 3-channel 76dB audio  
attenuator fabricated on a CMOS process. Each channel  
has attenuation steps of 0.5dB from 0dB–15.5dB, 1.0dB  
steps from 16dB–47dB, and 2.0dB steps from 48dB– 76dB,  
with a mute function attenuating 104dB. Its logarithmic at-  
tenuation curve can be customized through software to fit  
the desired application.  
0.25dB (max)  
110dB (min)  
110dB (typ)  
n Signal-to-noise ratio (ref. 4 Vrms):  
n Channel separation:  
The performance of a µPot is demonstrated through its  
Features  
excellent Signal-to-Noise Ratio, extremely low (THD+N),  
and high channel separation. Each µPot contains a mute  
function that disconnects the input signal from the output,  
providing a minimum attenuation of 96dB. Transitions be-  
tween any attenuation settings are pop free.  
n 3-wire serial interface  
n Daisy-chain capability  
n 104dB mute attenuation  
n Pop and click free attenuation changes  
The LM1973’s 3-wire serial digital interface is TTL and  
CMOS compatible; receiving data that selects a channel and  
the desired attenuation level. The Data-Out pin of the  
LM1973 allows multiple µPots to be daisy-chained together,  
reducing the number of enable and data lines to be routed  
for a given application.  
Applications  
n Automated studio mixing consoles  
n Music reproduction systems  
n Sound reinforcement systems  
n Electronic music (MIDI)  
n Personal computer audio control  
Typical Application  
Connection Diagram  
Dual-In-Line Plastic or  
Surface Mount Package  
01195801  
FIGURE 1. Typical Audio Attenuator  
Application Circuit  
01195802  
Top View  
Order Number LM1973M or LM1973N  
See NS Package Number M20B or N20A  
µPot and Overture are trademarks of National Semiconductor Corporation.  
© 2004 National Semiconductor Corporation  
DS011958  
www.national.com  

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