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LM1972 Datasheet PDF

Part Series:LM1972 Series
Category:Semiconductors & Actives
Description:TEXAS INSTRUMENTS LM1972M/NOPB Audio Control, Attenuator, 4.5V to 12V, Serial, SOIC, 20Pins, 0 °C
Document:LM1972M/NOPB Datasheet PDF (37 Pages)

LM1972 Datasheet PDF Semiconductors & Actives

20 Pages
National Semiconductor
IC AUDIO ATTENUATOR 2CH 20-DIP

LM1972M/NOPB - TI Specifications

TYPE
DESCRIPTION
Mounting Style
Surface Mount
Number of Pins
20 Pin
Supply Voltage (DC)
12.0 V
Case/Package
SOIC-20
Supply Current
4 mA
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LM1972M/NOPB - TI Function 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
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.
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