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参数资料
| 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： | 13/13页 |
| 文件大小： | 290K |
| 代理商： | LM1971MWC |
Application Information (Continued)
MUTE FUNCTION
A major feature of the LM1971 is its ability to mute the input
signal to an attenuation level of 102 dB. This is accom-
plished internally by physically disconnecting the output from
the input while also grounding the output pin through ap-
proximately 2 k
.
The mute function is obtained during power-up of the device
or by sending any binary data of 0011 1111 and above seri-
ally to the device. The device may be placed into mute at any
time during operation, allowing the designer to make the
mute command accessible to the end-user.
DC INPUTS
Although the Pot was designed to be used as an attenuator
for signals within the audio spectrum, it is also capable of
tracking and attenuating an input DC voltage. The device will
track voltages to either supply rail.
One point to remember about DC tracking is that with a
buffer at the output of the Pot, the resolution of DC tracking
will depend upon the gain configuration of that output buffer
and its supply voltage. Also, the output buffer’s supply volt-
age does not have to be the same as the Pot’s supply volt-
age. Giving the buffer some gain can provide more resolu-
tion when tracking small DC voltages.
www.national.com
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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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