LM1971中文资料具有静音功能的数字控制 62dB 音频衰减器数据手册TI规格书

描述 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 Distortion (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 PDIP or SOIC 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.

特性 Features

• 3-Wire Serial Interface
• Click and Pop Free Attenuation Changes
• Total Harmonic Distortion 0.0008 % (Typ)
• Attenuation Range (Excluding Mute) 62 dB (Typ)
• Mute Attenuation 102 dB (Typ)