TEXAS INSTRUMENTS  LM1972M/NOPB  Audio Control, Attenuator, 4.5V to 12V, 3 Wire, Serial, SOIC, 20 Pins, 0 °C


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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


Audio; Consumer Electronics
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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Product Information

  • Audio Control Type Attenuator
  • Supply Voltage Range 4.5V to 12V
  • Control Interface 3 Wire, Serial
  • Audio IC Case Style SOIC
  • No. of Pins 20Pins
  • Operating Temperature Min 0°C
  • Operating Temperature Max 70°C
  • Packaging Each
  • Output Power 150 mW
  • MSL MSL 3 - 168 hours
  • Control / Process Application Automated Studio Mixing Consoles, Music Reproduction Systems, Electronic Music(MIDI)
  • SVHC No SVHC (15-Jun-2015)


Availability:  32

Available until stock is exhausted

  • 32 in stock for same day shipping

Price for: Each

Minimum order quantity: 1

Order multiple quantity: 1

Price: $5.63 $5.63



Quantity List Price
1 - 9 $5.63
10 - 24 $4.98
25 - 49 $4.65
50 - 99 $4.40
100 - 249 $4.08
250 - 499 $3.87
500 - 999 $3.48
1000+ $2.62

Legislation and Environmental

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IC,Tone/Volume/Balance Control,CMOS,SOP,20PIN,PLASTIC

Availability:​ 0

Price for: Each (Supplied on Full Reel)

1000+ $2.18

    More stock available week commencing 8/8/16

Not Normally Stocked

Non-Cancelable / Non Returnable

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