NS LM1972M

音量控制汽车音频，消费类音频2SPI4.5V ~ 12V

Overview

The LM1972M is a digitally controlled 2-channel 78dB audio attenuator fabricated on a CMOS process. Each channel has attenuation steps of 0.5dB from 0dB–47.5dB, 1.0dB steps from 48dB–78dB, with a mute function attenuating 104dB. Its logarithmic attenuation curve can be customized through software to fit the desired application.

The LM1972's 3-wire serial digital interface is TTL and CMOS compatible; receiving data that selects a channel and the desired attenuation level. The Data-Out pin of the LM1972M allows multiple μPots to be daisy-chained together, reducing the number of enable and data lines to be routed for a given application.

Features

Bulk Package
With 20-SOIC (0.295, 7.50mm Width) channels
operate temperature at the range of 0°C~70°C TA

Surface Mount Mounting Type

Applications

There are a lot of Rochester Electronics, LLC
LM1972M Audio Special Purpose applications.

• Car or Mobile Audio System
• Digital Television
• Musical Instruments
• Recording Systems
• High-End Audio/Sound Card for PC
• Replacement of DIR1703
• Other Applications Requiring S/PDIF Receiver
• Audio Differential Line Drivers
• Audio Mix Consoles
• Distribution Amplifiers