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| 型号： | LM1971MWC |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, UUC |
| 封装： | WAFER |
| 文件页数： | 5/13页 |
| 文件大小： | 290K |
| 代理商： | LM1971MWC |
National P/N LM1971 - Digitally Controlled 62 dB Audio Attenuator with/Mute
General Description
The LM1971 is a digitally controlled single channel audio attenuator fabricated on a CMOS process.
Attenuation is variable in 1 dB steps from 0 dB to -62 dB. A mute function disconnects the input from the
output, providing over 100 dB of attenuation.
The performance of the device is exhibited by its ability to change attenuation levels without audible clicks or
pops. In addition, the LM1971 features a low Total Harmonic Distortion (THD) of 0.0008%, and a Dynamic
Range of 115 dB, making it suitable for digital audio needs. The LM1971 is available in both 8-pin plastic DIP
or SO packages.
The LM1971 is controlled by a TTL/CMOS compatible 3-wire serial digital interface. The active low LOAD line
enables the data input registers while the CLOCK line provides system timing. Its DATA pin receives serial
data on the rising edge of each CLOCK pulse, allowing the desired attenuation setting to be selected.
Features
q
3-wire serial interface
q
Mute function
q
Click and pop free attenuation changes
q
8-pin plastic DIP and SO packages available
Key Specification
Total harmonic distortion
0.0008% (typ)
Frequency response
> 200 kHz (-3 dB) (typ)
Attenuation range (excluding mute)
62 dB (typ)
Dynamic range
115 dB (typ)
Mute attenuation
102 dB (typ)
Applications
q
Communication systems
q
Cellular Phones and Pagers
q
Personal computer audio control
q
Electronic music (MIDI)
q
Sound reinforcement systems
q
Audio mixing automation
[Information as of 5-Aug-2002]
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LM1971MX | 功能描述:衰减器 -IC RoHS:否 制造商:Skyworks Solutions, Inc. 最大衰减:18 dB 容差: 阻抗: 功率额定值:30 dBm 安装风格:SMD/SMT 工作温度范围:- 40 C to + 85 C |
| LM1971MX/NOPB | 功能描述:衰减器 -IC RoHS:否 制造商:Skyworks Solutions, Inc. 最大衰减:18 dB 容差: 阻抗: 功率额定值:30 dBm 安装风格:SMD/SMT 工作温度范围:- 40 C to + 85 C |
| LM1971N | 制造商:NSC 制造商全称:National Semiconductor 功能描述:LM1971 Overture⑩ Audio Attenuator Series Digitally Controlled 62 dB Audio Attenuator with/Mute |
| LM1971N/NOPB | 功能描述:IC ATTENUATOR AUDIO W/MUTE 8-DIP RoHS:是 类别:集成电路 (IC) >> 线性 - 音频处理 系列:Overture™ 其它有关文件:STA321 View All Specifications 标准包装:1 系列:Sound Terminal™ 类型:音频处理器 应用:数字音频 安装类型:表面贴装 封装/外壳:64-LQFP 裸露焊盘 供应商设备封装:64-LQFP EP（10x10） 包装:Digi-Reel® 其它名称:497-11050-6 |
| LM1972 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Pot 2-Channel 78dB Audio Attenuator with Mute |
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