參數(shù)資料
型號(hào): LM1971MDC
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類(lèi): 消費(fèi)家電
英文描述: SPECIALTY CONSUMER CIRCUIT, UUC
封裝: DIE
文件頁(yè)數(shù): 1/13頁(yè)
文件大?。?/td> 290K
代理商: LM1971MDC
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
相關(guān)PDF資料
PDF描述
LM1971MWC SPECIALTY CONSUMER CIRCUIT, UUC
LM1972MNOPB SPECIALTY CONSUMER CIRCUIT, PDSO20
LM1972NNOPB SPECIALTY CONSUMER CIRCUIT, PDIP20
LM1972N/NOPB SPECIALTY CONSUMER CIRCUIT, PDIP20
LM1973N/NOPB SPECIALTY CONSUMER CIRCUIT, PDIP20
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