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參數資料
| 型號： | LM1971MWC |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, UUC |
| 封裝： | WAFER |
| 文件頁數： | 1/13頁 |
| 文件大小： | 290K |
| 代理商： | LM1971MWC |
LM1971
Overture Audio Attenuator Series
Digitally Controlled 62 dB Audio Attenuator with/Mute
General Description
The LM1971 is a digitally controlled single channel audio at-
tenuator fabricated on a CMOS process. Attenuation is vari-
able in 1 dB steps from 0 dB to 62 dB. A mute function dis-
connects 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 Distor-
tion (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.
Key Specifications
n Total harmonic distortion
0.0008% (typ)
n Frequency response
> 200 kHz (3 dB) (typ)
n Attenuation range (excluding mute)
62 dB (typ)
n Dynamic range
115 dB (typ)
n Mute attenuation
102 dB (typ)
Features
n 3-wire serial interface
n Mute function
n Click and pop free attenuation changes
n 8-pin plastic DIP and SO packages available
Applications
n Communication systems
n Cellular Phones and Pagers
n Personal computer audio control
n Electronic music (MIDI)
n Sound reinforcement systems
n Audio mixing automation
Typical Application
Overture is a trademark of National Semiconductor Corporation.
DS012353-1
FIGURE 1. Typical Audio Attenuator Application Circuit
May 1999
LM1971
Overture
Audio
Attenuator
Series
Digitally
Controlled
62
dB
Audio
Attenuator
with
Mute
1999 National Semiconductor Corporation
DS012353
www.national.com
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| LM1972MNOPB | SPECIALTY CONSUMER CIRCUIT, PDSO20 |
| LM1972NNOPB | SPECIALTY CONSUMER CIRCUIT, PDIP20 |
| LM1972N/NOPB | SPECIALTY CONSUMER CIRCUIT, PDIP20 |
| LM1973N/NOPB | SPECIALTY CONSUMER CIRCUIT, PDIP20 |
| LM2005T | 11 W, 2 CHANNEL, AUDIO AMPLIFIER, PSFM11 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LM1971MX | 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 |
| LM1971MX/NOPB | 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 |
| LM1971N | 制造商:NSC 制造商全稱: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 類別:集成電路 (IC) >> 線性 - 音頻處理 系列:Overture™ 其它有關文件:STA321 View All Specifications 標準包裝:1 系列:Sound Terminal™ 類型:音頻處理器 應用:數字音頻 安裝類型:表面貼裝 封裝/外殼:64-LQFP 裸露焊盤 供應商設備封裝:64-LQFP EP（10x10） 包裝:Digi-Reel® 其它名稱:497-11050-6 |
| LM1972 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Pot 2-Channel 78dB Audio Attenuator with Mute |
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