HOME HOME SELECT DESIGN BUY EXPLORE About Us Support My Profile Search

 Products > Audio Products > Other Audio > Controls > LM1973

LM1973  Product Folder

Micro-Pot 3-Channel 76 dB Audio Attenuator with Mute
Generic P/N 1973
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
Receive via Email
LM1973 µPot3-Channel 76dB Audio Attenuator with Mute 305 Kbytes 24-Jun-99 View Online Download Receive via Email
LM1973 µPot3-Channel 76dB Audio Attenuator with Mute (JAPANESE)
 671 Kbytes   View Online Download Receive via Email

If you have trouble printing or viewing PDF file(s), see Printing Problems.

Package Availability, Models, Samples & Pricing

Part NumberPackageStatusModelsSamples &
Electronic
Orders		Budgetary PricingStd
Pack
Size		Package
Marking
TypePinsMSL/Lead-Free AvailabilityLead
Time		QtySPICEIBISQty$US each
LM1973MSOIC WIDE20StatusFull productionN/AN/A24 Hour Samples
Buy Now 		1K+$2.28rail
of
36		NSUZXYTT
LM1973M
10-12 weeks6000
LM1973MXSOIC WIDE20StatusFull productionN/AN/A 1K+$2.28reel
of
1000		NSUZXYTT
LM1973M
10-12 weeks20000
LM1973NMDIP20StatusFull productionN/AN/A24 Hour Samples
Buy Now 		1K+$2.28rail
of
18		NSUZXYYTT
LM1973N
10-12 weeks6000

General Description

The LM1973 is a digitally controlled 3-channel 76dB audio attenuator fabricated on a CMOS process. Each channel has attenuation steps of 0.5dB from 0dB-15.5dB, 1.0dB steps from 16dB-47dB, and 2.0dB steps from 48dB- 76dB, 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 LM1973'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 LM1973 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):

76dB (typ)

Differential attenuation:

±0.25dB (max)

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

110dB (min)

Channel separation:

110dB (typ)

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
LM1973MP2CMOS0333000012500003353423344
LM1973MXP2CMOS0333000012500003353423344
LM1973NP2CMOS0333000012500003353423344

For more information on Reliablitity Metrics, please click here.


[Information as of 15-Jan-2004]

Website Guide • About "Cookies" • National is QS 9000 Certified • Privacy/Security Statement • Contact Us/Feedback
Site Terms & Conditions of Use • Copyright 2003© National Semiconductor Corporation