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LM1972  Product Folder

Micro-Pot 2-Channel 78 dB Audio Attenuator with Mute
Generic P/N 1972
General
Description		 Features Datasheet Package
& Models		 Samples
& Pricing		 Reliability
Metrics

Parametric Table Parametric Table
Temperature Min (deg C) 0000000000.0000 
Temperature Max (deg C) 70 
Supply Min (Volt) 4.50 
Supply Max (Volt) 15 
Equivalent Input Noise (uV/root(Hz)) 13 
THD (%) .08 

Datasheet

TitleSize in KbytesDate
View Online
Download
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LM1972 µPot 2-Channel 78dB Audio Attenuator with Mute 301 Kbytes 28-Jun-99 View Online Download Receive via Email
LM1972 µPot 2-Channel 78dB Audio Attenuator with Mute (JAPANESE)
 654 Kbytes   View Online Download Receive via Email

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Package Availability, Models, Samples & Pricing

Part NumberPackageStatusModelsSamples &
Electronic
Orders		Budgetary PricingStd
Pack
Size		Package
Marking
TypePinsMSL/Lead-Free AvailabilityLead
Time		QtySPICEIBISQty$US each
LM1972MSOIC WIDE20StatusFull productionN/AN/A24 Hour Samples
Buy Now 		1K+$2.20rail
of
36		NSUZXYTT
LM1972M
4-8 weeks10000
LM1972MXSOIC WIDE20StatusFull productionN/AN/A 1K+$2.20reel
of
1000		NSUZXYTT
LM1972M
4-8 weeks5000
LM1972NMDIP20StatusFull productionN/AN/A24 Hour Samples
Buy Now 		1K+$2.45rail
of
18		NSUZXYYTT
LM1972N
4-8 weeks6000
LM1972 MDCUnpackaged DieFull productionN/AN/ASamples  gel pak
of
N/A		-
N/A0
LM1972 MWCWaferFull productionN/AN/A   wafer jar
of
N/A		-
N/A0

General Description

The LM1972 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 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 LM1972 allows multiple µPots to be daisy-chained together, reducing the number of enable and data lines to be routed for a given application.

Features

  • 3-wire serial interface
  • Daisy-chain capability
  • 104dB mute attenuation
  • Pop and click free attenuation changes

Key Specification

Total Harmonic Distortion + Noise:

0.003% (max)

Frequency response:

100 kHz (-3dB) (min)

Attenuation range (excluding mute):

78dB (typ)

Differential attenuation:

±0.25dB (max)

Signal-to-noise ratio (ref. 4 Vrms):

110dB (min)

Channel separation:

100dB (min)

Applications

  • Automated studio mixing consoles
  • Music reproduction systems
  • Sound reinforcement systems
  • Electronic music (MIDI)
  • Personal computer audio control

Reliability Metrics

Part Number Process Early Failure Rate - Rejects Sample Size (EFR) PPM * Rel. Rejects Device Hours Long Term Failure Rates (FITS) MTTF
LM1972 MDCP2CMOS0333000012500003353423344
LM1972 MWCP2CMOS0333000012500003353423344
LM1972MP2CMOS0333000012500003353423344
LM1972MXP2CMOS0333000012500003353423344
LM1972NP2CMOS0333000012500003353423344

For more information on Reliablitity Metrics, please click here.


[Information as of 15-Jan-2004]

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