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LM1971 Product Folder

Digitally Controlled 62 dB Audio Attenuator with/Mute

Generic P/N 1971

Parametric Table

Temperature Min (deg C)	-40
Temperature Max (deg C)	85
Supply Min (Volt)	4.50

Supply Max (Volt)	15
Equivalent Input Noise (uV/root(Hz))	4
THD (%)	.08

Datasheet

Title	Size in Kbytes	Date	View Online	Download	Receive via Email
LM1971 Overture Audio Attenuator Series Digitally Controlled 62 dB Audio Attenuator with Mute	293 Kbytes	30-Sep-02	View Online	Download	Receive via Email
LM1971 Overture Audio Attenuator Series Digitally Controlled 62 dB Audio Attenuator with Mute (JAPANESE)	390 Kbytes

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Package Availability, Models, Samples & Pricing

Part Number

Package

Status

Models

Samples &
Electronic
Orders

Budgetary Pricing

Std
Pack
Size

Package
Marking

Type

Pins

MSL/Lead-Free Availability

Lead
Time

Qty

SPICE

IBIS

Qty

$US each

LM1971M

SOIC NARROW

Status

Full production

N/A

1K+

$1.25

rail
of
95

NSXYTT
LM19
71M

4-8 weeks

7500

LM1971MX

SOIC NARROW

Status

Full production

N/A

1K+

$1.25

reel
of
2500

NSXYTT
LM19
71M

4-8 weeks

7500

LM1971N

MDIP

Status

Full production

N/A

1K+

$1.25

rail
of
40

NSUZXYTT
LM1971N

4-8 weeks

7500

LM1971 MDC

Unpackaged Die

Full production

N/A

tray
of
N/A

N/A

LM1971 MWC

Wafer

Full production

N/A

wafer jar
of
N/A

N/A

Obsolete Parts

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
LM1971-NRE	NONE	NONE	06/07/2000

The LM1971 is a digitally controlled single channel audio attenuator fabricated on a CMOS process. Attenuation is variable in 1 dB steps from 0 dB to -62 dB. A mute function disconnects the input from the output, providing over 100 dB of attenuation.

The performance of the device is exhibited by its ability to change attenuation levels without audible clicks or pops. In addition, the LM1971 features a low Total Harmonic Distortion (THD) of 0.0008%, and a Dynamic Range of 115 dB, making it suitable for digital audio needs. The LM1971 is available in both 8-pin plastic DIP or SO packages.

The LM1971 is controlled by a TTL/CMOS compatible 3-wire serial digital interface. The active low LOAD line enables the data input registers while the CLOCK line provides system timing. Its DATA pin receives serial data on the rising edge of each CLOCK pulse, allowing the desired attenuation setting to be selected.

Features

3-wire serial interface
Mute function
Click and pop free attenuation changes
8-pin plastic DIP and SO packages available

Key Specification

Total harmonic distortion	0.0008% (typ)
Frequency response	> 200 kHz (-3 dB) (typ)
Attenuation range (excluding mute)	62 dB (typ)
Dynamic range	115 dB (typ)
Mute attenuation	102 dB (typ)

Applications

Communication systems
Cellular Phones and Pagers
Personal computer audio control
Electronic music (MIDI)
Sound reinforcement systems
Audio mixing automation

Reliability Metrics

Part Number	Process	Sample Size (EFR)	Device Hours	Long Term Failure Rates (FITS)	MTTF
LM1971 MDC	P2CMOS	33300	1250000	3	353423344
LM1971 MWC	P2CMOS	33300	1250000	3	353423344
LM1971M	P2CMOS	33300	1250000	3	353423344
LM1971MX	P2CMOS	33300	1250000	3	353423344
LM1971N	P2CMOS	33300	1250000	3	353423344

For more information on Reliablitity Metrics, please click here.

[Information as of 15-Jan-2004]

LM1971 Product Folder