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參數資料
| 型號： | LM1971 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | LM1971 Overture⑩ Audio Attenuator Series Digitally Controlled 62 dB Audio Attenuator with/Mute |
| 中文描述： | LM1971音頻序曲⑩衰減器系列數控六十二分貝音頻衰減器與/靜音 |
| 文件頁數： | 1/11頁 |
| 文件大?。?/td> | 248K |
| 代理商： | LM1971 |
LM1971Overture
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 DATApin 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
n
Frequency response
n
Attenuation range (excluding mute)
n
Dynamic range
n
Mute attenuation
0.0008% (typ)
>
200 kHz (3 dB) (typ)
62 dB (typ)
115 dB (typ)
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
L
1999 National Semiconductor Corporation
DS012353
www.national.com
相關PDF資料 |
PDF描述 |
|---|---|
| LM1971M | LM1971 Overture⑩ Audio Attenuator Series Digitally Controlled 62 dB Audio Attenuator with/Mute |
| LM1971N | LM1971 Overture⑩ Audio Attenuator Series Digitally Controlled 62 dB Audio Attenuator with/Mute |
| LM1972 | Pot 2-Channel 78dB Audio Attenuator with Mute |
| LM1972MX | Tone/Volume/Balance Control |
| LM1972M | Pot 2-Channel 78dB Audio Attenuator with Mute |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LM1971M | 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 |
| LM1971M | 制造商:Texas Instruments 功能描述:AUDIO ATTENUATOR 62DB 1971 SOIC8 |
| LM1971M/NOPB | 功能描述:有源衰減器 DIG CONTROLLED 62 DB AUDIO ATTENUATOR 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: |
| LM1971M/NOPB | 制造商:Texas Instruments 功能描述:IC, AUDIO ATTENTUATOR, SOIC-8 |
| 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 |
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