LM1971是TI公司的一款无产品，LM1971是具有静音功能的数字控制 62 dB 音频衰减器，本页介绍了LM1971的产品说明、应用、特性等，并给出了与LM1971相关的TI元器件型号供参考。
LM1971 - 具有静音功能的数字控制 62 dB 音频衰减器 - 无 - 音量控制 - TI公司（Texas Instruments，德州仪器）
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.
- 3-Wire Serial Interface
- Mute Function
- Click and Pop Free Attenuation Changes
- 8-Pin Plastic PDIP and SOIC Packages Available
Key Specifications
- Total Harmonic Distortion 0.0008 % (Typ)
- Frequency Response > 200 kHz (−3 dB) (Typ)
- Attenuation Range (Excluding Mute) 62 dB (Typ)
- Dynamic Range 115 dB (Typ)
- Mute Attenuation 102 dB (Typ)
