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LM1972M/NOPB .

Audio Control, Attenuator, 4.5V to 12V, Serial, SOIC, 20 Pins, 0 °C

TEXAS INSTRUMENTS LM1972M/NOPB .

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Manufacturer Part No:
LM1972M/NOPB .
Order Code:
2323777

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Product Overview

The LM1972M/NOPB is a Micro-Pot 2-channel Audio Attenuator with mute fabricated on a CMOS process. Each channel has attenuation steps of 0.5dB from 0dB to 47.5dB, 1dB steps from 48dB to 78dB, with a mute function attenuating 104dB. Its logarithmic attenuation curve can be customized through software to fit the desired application. The performance of a µPot is demonstrated through its excellent Signal-to-Noise Ratio, extremely low (THD+N) and high channel separation. Each µPot contains a mute function that disconnects the input signal from the output, providing a minimum attenuation of 96dB. Transitions between any attenuation settings are pop free. 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 attenuator allows multiple µPots to be daisy-chained together, reducing the number of enable and data lines to be routed for a given application.
  • 3-wire serial interface
  • Daisy-chain capability
  • 104dB Mute attenuation
  • Pop and click-free attenuation changes
  • Green product and no Sb/Br

Applications

Audio, Consumer Electronics

Warnings

This device has limited built-in ESD protection, leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.

Product Information

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:
Attenuator

:
4.5V to 12V

:
Serial

:
SOIC

:
20Pins

:
0°C

:
70°C

:
-

:
-

:
MSL 3 - 168 hours
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