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參數資料
| 型號： | LM1971-NRE |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDIP8 |
| 封裝： | 0.300 INCH, PLASTIC, DIP-8 |
| 文件頁數： | 11/11頁 |
| 文件大小： | 248K |
| 代理商： | LM1971-NRE |
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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相關代理商/技術參數 |
參數描述 |
|---|---|
| LM1972 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Pot 2-Channel 78dB Audio Attenuator with Mute |
| LM1972M | 功能描述:衰減器 -IC RoHS:否 制造商:Skyworks Solutions, Inc. 最大衰減:18 dB 容差: 阻抗: 功率額定值:30 dBm 安裝風格:SMD/SMT 工作溫度范圍:- 40 C to + 85 C |
| LM1972M/NOPB | 功能描述:有源衰減器 RoHS:否 制造商:TriQuint Semiconductor 通道數量: 最大頻率: 阻抗: 最大 VSWR: 位數: 最大工作溫度: 最小工作溫度: |
| LM1972MX | 功能描述:衰減器 -IC RoHS:否 制造商:Skyworks Solutions, Inc. 最大衰減:18 dB 容差: 阻抗: 功率額定值:30 dBm 安裝風格:SMD/SMT 工作溫度范圍:- 40 C to + 85 C |
| LM1972MX/NOPB | 功能描述:有源衰減器 RoHS:否 制造商:TriQuint Semiconductor 通道數量: 最大頻率: 阻抗: 最大 VSWR: 位數: 最大工作溫度: 最小工作溫度: |
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