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參數(shù)資料
| 型號(hào)： | LM1971N/NOPB |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDIP8 |
| 封裝： | 0.300 INCH, PLASTIC, DIP-8 |
| 文件頁數(shù)： | 1/11頁 |
| 文件大?。?/td> | 293K |
| 代理商： | LM1971N/NOPB |
LM1971Overture Audio Attenuator Series
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 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.
01235301
FIGURE 1. Typical Audio Attenuator Application Circuit
September 2002
LM1971
Overture
Audio
Attenuator
Series
Digitally
Controlled
62
dB
Audio
Attenuator
with
Mute
2002 National Semiconductor Corporation
DS012353
www.national.com
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)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(fēng)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(shù)量: 最大頻率: 阻抗: 最大 VSWR: 位數(shù): 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(fēng)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(shù)量: 最大頻率: 阻抗: 最大 VSWR: 位數(shù): 最大工作溫度: 最小工作溫度: |
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